2013 Issue 5

2013-5

Inż. Ap. Chem. (Chemical Engineering and Equipment) 2013, 52, issue 5

Table of Contents

Get TOC

→Full texts available
    on  our Polish pages

Page

ABSTRACTS

 

 

 

Scientific papers:

 

A. BORZĘCKA, A. MUSIALIK-PIOTROWSKA: Activity of LaMnO3 perovskite monolithic catalyst in the oxidation of selected volatile organic compounds
Inż. Ap. Chem. 2013, 52, 5, 399-400
Monolithic perovskite catalyst LaMnO3 was manufactured and tested for activity in the oxidation of selected volatile organic compounds. Tests were conducted in a quartz cross-flow reactor for the space velocity equal to 10 000 h-1 and the concentration of each oxidized compound – 1 g/m3. Prepared catalyst showed high activity in the oxidation of oxy-derivatives – ethanol and acetone, and aliphatic hydrocarbon – n-heptane, lower in the oxidation of ethyl acetate. The lowest activity of catalyst was found for aromatic hydrocarbons oxidation – toluene and xylenes.
Keywords: catalytic oxidation, VOCs, perovskite

399

———————————————————————————————

 

A. BRANDT, S. WITCZAK, M. PIETRZAK: Two-phase water – oil liquid flow hydrodynamics in a vertical pipe
Inż. Ap. Chem. 2013, 52, 5, 401-402
The conducted research allowed one to determine characteristic values for flowing liquid films. That made it possible to calculate the average thicknesses of occurring liquid films, determine phases void fractions and each liquid phases dominance in the flow and showed that the applied method of measuring the conductivity of liquid – liquid system can constitute an important tool to identify the structures in two-phase liquid flow.
Keywords: two-phase flow, gravitational liquid flow, liquid film thickness

401

———————————————————————————————

 

L. BRONIARZ-PRESS, M. OCHOWIAK, S. WŁODARCZAK, M. MARKUSZEWSKA: Analysis of liquid discharge coefficient in pressure-swirl atomizers with different outlet shapes
Inż. Ap. Chem. 2013, 52, 5, 403-404
Experimental studies dealing with the effect of outlet shape on discharge coefficient and relation of discharge coefficient vs. Reynolds number are presented in the paper. The largest values of discharge coefficient were obtained for a profiled outlet of the atomizer. It was shown that the orifice length to diameter ratio did not affect the value of discharge coefficient.
Keywords: pressure-swirl atomizer, discharge coefficient, atomizer construction, atomization

403

———————————————————————————————

 

L. BRONIARZ-PRESS, K. STACHURSKA, M. STACHURSKA: Mixing power in a mixer equipped with two impellers mounted on the common shaft
Inż. Ap. Chem. 2013, 52, 5, 405-407
Research results dealing with the effect of distance between two impellers mounted on the common shaft on mixing power in water − oil 20-30 and water − oil 20-70 systems, and the minimal agitator speed needed for emulsification are presented in the paper. It is shown that the minimal agitator speed depends on the distance between two impellers and a type of agitators. It was stated that mixing power depends on a type of agitators used. Mixing power achieved the biggest value for the system of 2RT impellers.
Keywords: emulsification, mixing, mineral oil

405

———————————————————————————————

 

B. BUCZEK, U. KANIK: Apparatus for carbonization and activation of carbonaceous raw materials – carbonization in CO2 atmosphere
Inż. Ap. Chem. 2013, 52, 5, 408-409
The apparatus for the production of carbonaceous adsorbents from different precursors, especially natural raw materials are presented in the paper. The construction and operation conditions of apparatus were described and the results of iodine (LJ) and methylene (LM) numbers’ determination were presented. To evaluate the porosity of obtained carbonizates the mercury porosimetry method was used. The results of investigations and tests showed that carbonization products can be used in the production of meso- and macroporous carbonaceous adsorbents.
Keywords: lab-reactor, carbonization, activation, carbonaceous raw materials

408

———————————————————————————————

 

R. DYGA, S. WITCZAK, G. FILIPCZAK: Simulation of fluid flow through FEC metal foam using the periodic geometrical model of foam
Inż. Ap. Chem. 2013, 52, 5, 410-411
The paper presents the results of computer simulation of water flow through FeCrAlY alloy foam (FEC). Simulations were carried out in the flow area limited to a representative elementary volume of foam (REV). It was found that even at the significant simplification of foam structure geometry the hydrodynamic phenomena in cellular foam were properly reflected. Pressure drop values determined by numerical calculations differ from the measured ones only by a few percent. The velocity distribution and a course of its pathway achieved in simulation allow one to specify the conditions for changing flow nature from laminar to turbulent.
Keywords: FEC metal foam, cell geometric model, periodic structure, REV

410

———————————————————————————————

 

M. DYLĄG, J. ROSIŃSKI: Application of momentum method for the rapid estimation of self-adjusting size distribution of flocs
Inż. Ap. Chem. 2013, 52, 5, 412-414
Results of comparative calculations dealing with the application of momentum method are presented in the paper. Hereby two different size distributions models based on the normal distribution and the Gaudin-Melloy distribution are used for the reconstruction of particle size distribution.
Keywords: floc size distribution, reconstruction of particle size distribution, normal distribution, Gaudin-Melloy distribution>

412

———————————————————————————————

 

G. DZIDO, A.B. JARZĘBSKI, M. KORPYŚ, P. MARKOWSKI: Fabrication of Ag and Cu nanoparticles in electromagnetic microwave field
Inż. Ap. Chem. 2013, 52, 5, 415-416
The paper presents investigation results dealing with the fabrication of silver and copper nanoparticles in the microwave assisted flow process. The synthesis were carried out with application of ethylene glycol as reducer, AgNO3 , AgOAc and Cu(OAc)2 as precursors of nanoparticles and polyvinylpirrolidone K-30 as stabilizer of colloids. It was found a crucial influence of process temperature and precursor type on a final size of prepared nanoparticles.
Keywords: nanoparticles, flow process, microwave field

415

———————————————————————————————

 

K. FRANK, U. TAUT, S. WITCZAK: Analysis of the plate heat exchangers’ application in the adiabatic air cooling system
Inż. Ap. Chem. 2013, 52, 5, 417-418
Analysis of possible use of plate heat exchangers in the industrial air evaporative cooling system is presented in the paper. The selected elements of numerical algorithm calculations with the results for conducted experimental research conditions are given. The comparison between experimental and calculated results was made showing a high accuracy. Exploitation conditions of the installation are discussed and possibility of its optimization is indicated.
Keywords: evaporative cooling, plate heat exchangers, process modeling

417

———————————————————————————————

 

U. GABRIEL-PÓŁROLNICZAK, D. SZANIAWSKA, K. ĆWIRKO: Investigation on separation properties of ceramic membranes in the ultrafiltration process of model myoglobin solutions
Inż. Ap. Chem. 2013, 52, 5, 419-420                     Get the full text (in English)

Results of ultrafiltration process of myoglobin model solutions are presented in the paper. The effect of TMP and pH on the efficiency and selectivity of the membrane was tested. Ultrafiltration tests were conducted using the flat ceramic TiO 2 /ZrO 2 membranes of 50 kDa cut-off under the following conditions: temperature 20 oC, CFV 60 dm3
/h, TMP 0.05÷0.2 MPa, pH 3.3÷8.9,
protein concentration 0.005%. Experiments were conducted in the field of polar molecular modeling in order to determine the size, shape and electrostatic properties of the analyzed protein.
Keywords: ultrafiltration, ceramic membranes, proteins, molecular modeling

419

———————————————————————————————

 

M. GRYTA: Concentration of 1,3-propanediol solutions by membrane distillation
Inż. Ap. Chem. 2013, 52, 5, 421-422
Membrane distillation process was utilized for the concentration of 1,3-propanediol solutions resulting in the retention of alcohol in retentate by more than 99.6%. Long-term studies of the concentration carried out for over 600 h had demonstrated a good resistance to wettability of used polypropylene Accurel PP membranes.
Keywords: membrane distillation, 1,3-propanediol, glycerol, solution concentration

421

———————————————————————————————

 

M. GRYTA, W. TOMCZAK, J. BASTRZYK: Separation of glycerol solutions from bacterial fermentation in ultrafiltration-nanofiltration processes
Inż. Ap. Chem. 2013, 52, 5, 423-424
The separation of fermentation broths by ultrafiltration and nanofiltration integrated processes was investigated. The glycerol fermentation was carried out using Lactobacillus casei bacteria. During the UF process the solutions were clarified obtaining turbidity of 0.1 NTU. The NF process allowed one to remove a majority of salts present in broth. The application of NF270 and NF90 membranes enabled one to obtain a partial separation of organic compounds formed during the fermentation process.
Keywords: ultrafiltration, nanofiltration, glycerol, fermentation

423

———————————————————————————————

 

K. JABŁCZYŃSKA, T.R. SOSNOWSKI: Stability of liposomal drug carriers during atomization in selected medical nebulizers
Inż. Ap. Chem. 2013, 52, 5, 425-426
Influence of atomization method on the stability of liposomes being a novel carrier of inhalation medicines was studied. Measuring the droplet size and concentration of encapsulated tracer allowed one to demonstrate that pneumatic nebulization is destructive for liposomes due to high hydrodynamic stresses associated with liquid atomization. The VM nebulizer was shown to be less damaging for liposomes. The results allow for more rational selection of the atomizing device for delivery of atomized liposomes by inhalation.
Keywords: atomization, liposomes, encapsulation, inhalers

425

———————————————————————————————

 

A. JACKIEWICZ, L. GRADOŃ, J. MICHALSKI, D. WITKOWSKI: Unsteady filtration in multilayer fibrous structures
Inż. Ap. Chem. 2013, 52, 5, 427-428
The aim of this study was to design a multilayer filter structure, improving the economics of aerosols’ separation processes. Three individual various fibrous layers (one of them was a nanolayer) arranged in different configurations were investigated during purification of gas from solid particles. Analysis of changes in their morphology during various stages of the filtration process was used in the selection of optimal filter structure.
Keywords: aerosol, fibrous filter, unsteady filtration, melt-blown, nanofibres

427

———————————————————————————————

 

K. KAMIŃSKI, M. KRAWCZYK, J. PETERA: Extraction in the presence of electric field in the ionic liquid – organic mixture system running in a multi-nozzle contactor
Inż. Ap. Chem. 2013, 52, 5, 429-430
A multi-nozzle contactor for extraction in the presence of electric field is described. The contactor was tested against the ethanol extraction from a mixture with n-heptane. Ionic liquid [bmim][MeSO4 ] was used as the extraction solvent dispersed electrically. The diameter distribution of generated ionic liquid droplets was measured using the PDA laser system. It was proved that the increasing voltage between the electrodes results in finer droplets distribution and hence in better interfacial area development.
Keywords: extraction under electric field, liquid – liquid extraction, ionic liquids

429

———————————————————————————————

 

M. KARAŚ, D. ZAJĄC, R. ULBRICH: Research into heat transfer coefficient distribution on tubes’ surface and structures’ heterogeneity in vertical two-phase cross-flow over tube bundles using DPIV and electrochemical methods
Inż. Ap. Chem. 2013, 52, 5, 431-432                     Get the full text (in English)

Two-phase vertical flow over a tube bundle was examined. To calculate the heat transfer coefficient on tubes’ surface, the electrochemical technique based on heat and mass transfer analogy was used. The Digital Particle Image Velocimetry (DPIV) technique was applied to create velocity fields around tubes. The results obtained using both methods were compared in order to get an overview of velocity distribution around the tube and its influence on heat transfer intensity on its surface.
Keywords: heat exchange, DPIV, electrochemical method, two-phase flow

431

———————————————————————————————

 

B. KAWALEC-PIETRENKO, P. RYBARCZYK: Possibilities of ion separation kinetics control during simultaneous flotation of several metal ions
Inż. Ap. Chem. 2013, 52, 5, 433-434
Influence of the initial solution pH, collector concentration and air velocity on the course of Al(III), Cu(II) and Zn(II) ion and precipitate flotation was investigated. The highest values of flotation rate constants for aluminum, copper and zinc were observed for the precipitate flotation when a value of the initial solution pH was about 8. It was concluded that flotation rate constants for investigated metals were proportional to air velocity in the power of about 0.8.
Keywords: ion flotation, precipitate flotation, rate constant, metal ions

433

———————————————————————————————

 

J. KLOC, J. KARCZ: Physical properties of biomass used in power engineering industry
Inż. Ap. Chem. 2013, 52, 5, 435-436
Experimental analysis of physical properties of two types of biomass, obtained from waste materials of timber industry (X) and waste materials of
agriculture production was carried out. The calorific value and humidity of biomass were estimated. Effect of biomass humidity on its calorific value was evaluated for both types of biomass.
Keywords: biomass, calorific value, humidity, power engineering industry

435

———————————————————————————————

 

K. KOPEĆ, A. KOŁTUNIEWICZ, K. DĄBKOWSKA: Separation of lysozyme from a hen egg white using ion-exchange membrane chromatography
Inż. Ap. Chem. 2013, 52, 5, 437-438
The membrane chromatography is a separation technique which may be applied in the industrial separation of proteins. Results of lysozyme separation from a hen egg white using ion-exchange membrane adsorbers are presented in the paper. Three variants of stream recirculation were examined and products were tested by electrophoresis. The 87.5% recovery of lysozyme was obtained showing a high purity of final product.
Keywords: membrane chromatography, lysozyme, separation

437

———————————————————————————————

 

S.J. KOWALSKI, J.M. ŁECHTAŃSKA, D. MIERZWA: Qualitative aspect of cheery fruit subjected to hybrid drying
Inż. Ap. Chem. 2013, 52, 5, 439-440
Kinetics and qualitative aspect of cherry fruit subjected to hybrid drying is considered. Various combinations of convective, microwave and infrared drying methods were applied. The drying test were carried out with the application of different combinations of microwave power 100 W and infrared radiation 240 W with convective drying at air flow velocity 1.7 m/s and air temperature 343 K. The purpose of these studies was to find the most efficient drying method from a point of view of drying kinetics and quality of dried cheery fruit (colour and water activity).
Keywords: cheery, hybrid drying, drying kinetics, water activity

439

———————————————————————————————

 

K. KRAMEK-ROMANOWSKA, K. JABŁCZYŃSKA, T.R. SOSNOWSKI: Changes in dynamic surface activity of the lung surfactant induced by inhaled liposomal drug carriers
Inż. Ap. Chem. 2013, 52, 5, 441-442
Influence of liposomes made of lecithin or lecithin/cholesterol on the dynamic surface tension of model lung surfactant (Survanta) was investigated with the MBP (Maximum Bubble Pressure) method. Liposomes increase surfactant activity, especially in physiological temperature, due to liposome rearrangement and liberation of free lipids which are co-adsorbed at the interface. The results explain mechanisms of interactions between inhaled liposomal drug carriers and the lung surface.
Keywords: liposomes, adsorption, surface tension, inhalation, lung surfactant

441

———————————————————————————————

 

M. LECH, A. TRUSEK-HOŁOWNIA: Biodegradation of industrial whey using B. licheniformis strain
Inż. Ap. Chem. 2013, 52, 5, 443-444
Results of whey biodegradation using bacteria strain of B. licheniformis are presented in the paper. The growth kinetics of this strain was developed. The rate of lactose transformation to low lactose concentration is dependent on its content and it could be described as a first-order reaction. During biodegradation a decrease in proteins concentration was observed. In this case, the rate of biodegradation was much slower than that for lactose.
Keywords: cheese whey, biodegradation, B. licheniformis

443

———————————————————————————————

 

M. MASIUKIEWICZ, R. ULBRICH: Selected stereological parameters for the identification of two-phase gas − liquid mixture flow structures
Inż. Ap. Chem. 2013, 52, 5, 445-446
The paper illustrates the method of multi-phase mixture structure identification based on image analysis with stereological methods. The study was conducted in a rectangular slot channel and in minichannels for vertical cocurrent flow of air − water mixture. The quantitative and qualitative assessment of flow structure was calculated on basis of five specific stereological parameters. These information enable the control of device in which the flow occurs.
Keywords: stereological analysis, two-phase flow pattern, pattern recognition

445

———————————————————————————————

 

G. MUSIELAK, A. KLOZIŃSKI: Effect of drying techniques on polyamide properties
Inż. Ap. Chem. 2013, 52, 5, 447-448
Impact of drying time and technique used on processing, mechanical and rheological properties of polyamides was analyzed in the paper. Commercial polyamide Tarnamid T-27 and Tarnamid T-27 GF30 containing 30% (by weight) glass fibers were dried in a fluid bed dryer and a chamber dryer with forced air circulation. Polymer rheological characteristics (raw granulate) were measured using a plastometer and rotary rheometer. Evaluation of mechanical properties of sample paddles (product) produced in the injection molding process was made. The Young modulus, strength and elongation of samples at breakage were determined in the static tensile and bending tests using a universal testing machine. The impact of drying on the toughness and hardness of polyamide was also evaluated.
Keywords: drying, polyamide, mechanical properties, rheological properties

447

———————————————————————————————

 

S. NYKIEL, P. WESOŁOWSKI, K. ALEJSKI: Analysis of a central vortex formation in a mixer with the rotor-stator system used as a stirer
Inż. Ap. Chem. 2013, 52, 5, 449-452
Creation of a central vortex around the high speed shaft in rotor-stator type system, working as mechanical stirrer in the axis of tank without baffles was studied. Influence of rotor speed and the distance between agitator and tank bottom on the depth of a central vortex in three mixers with various geometric ratios D/d (tank diameter to impeller diameter) was analyzed. Tested medium was distilled water (t = 20 oC) filling each of the examined tanks to the level H = 2D. The relative depth of central vortex increased significantly with the increase of both the rotor speed and the relative distance between agitator and tank bottom.
Keywords: mixer, rotor-stator, vortex formation

449

———————————————————————————————

 

M. ODZIOMEK, T.R. SOSNOWSKI, L. GRADOŃ: Functional particles’ carrier for pulmonary drug delivery – preparation, properties, efficacy
Inż. Ap. Chem. 2013, 52, 5, 453-454
Effectiveness of inhalation therapy may be improved by the application of functional carriers which contain viscosity reducers (mucolytics). Influence of specially designed functional carrier powders on the viscosity and transport rate in the reconstructed bronchial mucus were investigated. The obtained results indicate the simultaneous reduction of mucus viscosity and improvement of mass transfer therefore showing the usefulness of proposed concept of functional carriers in pulmonary drug delivery.
Key words: aerosol therapy, mucus, functional carriers, mucus viscosity, mass transport

453

———————————————————————————————

 

K. OLEJNICZAK, P. WESOŁOWSKI: Research into the impact of simultaneous change of stirrer blades and shaft inclination angles on the process of floating particles suspension production
Inż. Ap. Chem. 2013, 52, 5, 455-456
Influence of simultaneous change of blades and agitator shaft inclination angle on the floating particles suspension production was studied. During the experimental tests polyethylene granulate was dispersed in water in a mixer without baffles. A turbine agitator with six blades was used in experiments. The results were plotted as classical mixing power characteristics. A significant influence of blades inclination angle and no effect of shaft inclination on the process were found.
Keywords: mixing, mixing power, blades and shaft inclination angle, floating particles suspension

455

———————————————————————————————

 

S. PATER, J. MAGIERA, A. GŁUSZEK, K. NEUPAUER: Heat pump usage in the installation with renewable energy sources for passive cooling
Inż. Ap. Chem. 2013, 52, 5, 457-458
Investigation results dealing with the heat pump operation with a vertical ground heat exchanger in passive cooling mode of selected rooms in a residential-commercial building in 2012 summer season are presented in the paper. The seasonal, and for each day, daily value of heat pump cooling capacity coefficient was specified. Effect of brine temperature, heat pump operation time and amount of heat received in a cooler on vertical probe cooling power is discussed.
Keywords: passive cooling, heat pump, vertical ground heat exchanger

457

———————————————————————————————

 

P. PIANKO-OPRYCH: Criteria for numerical modeling of low-temperature non-thermal plasma
Inż. Ap. Chem. 2013, 52, 5, 459-461
Critical parameters necessary to properly define a computational problem involving a low-temperature non-thermal plasma reactor of DBD type are discussed in the paper. A choice of these parameters is a complex issue due
to nonlinear nature of the phenomena which take place during the electrical
discharge. The codes of computational fluid dynamics are helpful in this issue. They enable the quantitative description of non-linear relationships between the time-dependent parameters.
Keywords: low-temperature non-thermal plasma, numerical modeling, CFD

459

———————————————————————————————

 

P. PIANKO-OPRYCH, E. KASILOVA, Z. JAWORSKI: Modelling of processes in a microtubular Solid Oxide Fuel Cell
Inż. Ap. Chem. 2013, 52, 5, 462-464                     Get the full text (in English)

Paper presents the first stage of developed modeling strategy, including the use of two-dimensional numerical model of the solid microtubular oxide fuel cell. Codes used in computational fluid dynamics (CFD) allowed a quantitative description of the non-linear relationship between parameters: temperature, pressure, substrate and product streams.
Keywords: solid microtubular oxide fuel cell, numerical modeling, CFD

462

———————————————————————————————

 

M. PIETRZAK, S. WITCZAK: Liquid − gas three-phase mixture flow in pipe bends
Inż. Ap. Chem. 2013, 52, 5, 465-466
The course and test results of determined flow patterns and void fractions of
ir – oil – water three-phase flow in pipe bends are presented in the paper. As a result of these studies, types of flow patterns formed in pipe tested, flow map and void fractions of phases were determined. The relationship for calculation of void fractions in the gas – liquid – liquid flow in pipe bends is proposed.
Keywords: gas – liquid – liquid flow, pipe bends, flow patterns, flow maps,
void fraction

465

———————————————————————————————

 

M. PILAREK, J. ZYGMUNTOWICZ, K. DĄBKOWSKA, W. MONIUK: Enzymatic method for oxygen solubility determination in liquid perfluorochemicals
Inż. Ap. Chem. 2013, 52, 5, 467-468
An enzymatic method for the determination of O2 solubility in perfluorodecalin (PFD) and based on the system of two reactions catalysed by oxidoreductases was elaborated. The proposed method enables one to determine the O2  concentration in PFD microliter-scale samples. Volumetric mass transfer coefficients in gas and liquid phases for the PFD-oxygen/air two-phase system were calculated.
Keywords: liquid perfluorochemical, perfluorodecalin, oxygen solubility, enzymatic method, glucose oxidase

467

———————————————————————————————

 

A. POŁUBOK, H. KACZMAREK: Spectra visualization of azobenzene and its derivatives
Inż. Ap. Chem. 2013, 52, 5, 469-470
Visualization of azobenzene spectra and its derivatives using numerical simulation on the NOVA supercomputer was carried out. Data obtained, such as calculating energy of individual excited states, energy stimulation and oscillator strength enabled one to find a position and intensity of bands in UV-Vis spectra. The IR spectra were determined on basis of harmonic vibration frequency. The obtained spectra corresponded quite well with literature data thus offering alternative for the application of traditional methods.
Keywords: azobenzene, UV-Vis spectra, IR spectra

469

———————————————————————————————

 

W. SAWIŃSKI, J. FEDER-KUBIS, W. LUDWIG: Extraction of copper ions in a ceramic membrane contactor
Inż. Ap. Chem. 2013, 52, 5, 471-472
Experimental studies on removal of copper(II) from aqueous solutions using a ceramic membrane contactor with 4,13-diaza-18-crown-6 ether as carrier dissolved in 1-decyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide [C10MIM][NTF2 ] were carried out. The influence of temperature gradient and external phase pH on mass-transfer rate of Cu2+ was experimentally investigated. It was found that the addition of 50% (v/v) of tributyl phosphate (TBP) to [C10MIM][NTF2 ] insignificantly decreased the distribution ratio.
Keywords: ionic liquid, crown ether, copper extraction, ceramic membrane

471

———————————————————————————————

 

P. SOBIESZUK: Modeling and experimental investigations of mass transfer for Taylor flow in gas − liquid systems in a microreactor
Inż. Ap. Chem. 2013, 52, 5, 473-474
A comparison of experimental results with theoretical data of volumetric liquid-side mass transfer coefficients in gas − liquid Taylor flow in a microchannel is presented in the paper. The experimental values of k L a were obtained based on Danckwerts’ method. Theoretical data were calculated using Ansys Fluent 14.0 software. Theoretical and experimental values of kL a are quite closed. The obtained theoretical results are also confirmed by literature data dealing with Taylor flow modeling.
Keywords: microreactor, Taylor flow, mass transfer, CFD

473

———————————————————————————————

 

R. SZAFRAN: Manufacture of microsystems by direct laser engraving DLP
Inż. Ap. Chem. 2013, 52, 5, 475-476
Results of experimental investigations of the application of direct laser prototyping method (DLP) in the process of manufacturing lab-on-a-chip systems are presented in the paper. The effects of laser beam power, speed of laser head and engraving resolution on the quality of resulting structures were analyzed. Thanks to the use of DLP technique, it is possible to shorten the manufacturing time of microsystems from dozens of hours to a few minutes and to reduce costs of system design and fabrication.
Keywords: laser engraving, DLP, microsystems, microengineering, lab-on-a-chip, LOC

475

———————————————————————————————

 

R. SZAFRAN: Method of designing lab-on-a-chip microsystems for testing the flow in tumor capillaries
Inż. Ap. Chem. 2013, 52, 5, 477-478
The paper presents a new method for the designing of lab-on-a-chip (LOC) microdevices for biotechnology and medicine applications. It makes possible to reproduce the vascular structure, regardless of the organ, tumor or even the body. Methods for designing and fabrication of microsystems for microflow investigations in the network of capillary vessels of cancer tumor were developed. The complete methodology for fabrication and joining of the system is presented.
Keywords: angiogenesis, microflow, microsystems, lab-on-a-chip, LOC

477

———————————————————————————————

 

D. SZANIAWSKA, K. ĆWIRKO, U. GABRIEL-PÓŁROLNICZAK, M. SZMUKAŁA: Ultrafiltration of waste brine generated in fish processing industry
Inż. Ap. Chem. 2013, 52, 5, 479-480                     Get the full text (in English)

Research results dealing with the ultrafiltration process of waste brine from fish processing plants with the use of 300 and 150 kDa ceramic membranes are presented. Ultrafiltration tests were carried out for pH in the range of 5.0÷6.7, TMP of 0.1÷0.2 MPa and CFV of 60 dm3/h. The influence of ultrafiltration time, transmembrane pressure and cut-off on the separation process performance and effectiveness of total protein and fat rejections was
analyzed and the main mass-transport resistances, caused by membrane active layer, R M and fouling, R F were identified.
Keywords: ultrafiltration, ceramic membranes, brine from fish processing, membrane fouling

479

———————————————————————————————

 

E. SZTUK , Ł. ŻYWCZYK , A. MOSKAL, L. GRADOŃ: Numerical model of deep-bed water filtration
Inż. Ap. Chem. 2013, 52, 5, 481-482
A 2D network model was used to design the optimal structure of fibrous filter. It enables the efficient capture of particles, creates the lowest pressure drop and guarantees a long time usage. The individual layers were joined at three different configurations. A case of non-woven uniform monolayer with average performance was also examined. The deposition efficiency for particles diameter between 1÷10 μm was calculated. Results clearly indicate that combining layers with different porosities and especially their layering sequence has a major effect on deposition ratios inside the filter structure.
Keywords: deep-bed filtration, network model

481

———————————————————————————————

 

M. SZUKIEWICZ: Analysis of solutions for diffusion and reaction problem in a catalyst particle with a dead zone and multiple steady states
Inż. Ap. Chem. 2013, 52, 5, 483-484
Models of diffusion and reaction process in a pellet with the slab geometry valid for case with or without a dead zone are introduced. Published earlier and newly developed analytical solutions of the considered problem are analyzed and discussed for a full range of model parameter changes, taking into account a dead zone and multiple steady-states regions. A complete and coherent description of catalyst pellet behavior is presented.
Keywords: heterogenic catalysis, diffusion with reaction, dead zone, multiple steady-states

483

———————————————————————————————

 

M. SZWAST: Development of a new immobilized liquid membrane for separation of gaseous components
Inż. Ap. Chem. 2013, 52, 5, 485-486
In this paper the authors’ own SLM membrane is presented. For the purpose of this work a new immobilized membrane was prepared using a microporous polypropylene membrane and silicone oil. A new method for obtaining such membrane modules was developed. Tests were conducted using such gases as O2 , N2 and CO2 . The obtained results indicate that this type of membrane is characterized by large permeability factors but also by quite small separation factors.
Keywords: membranes, SLM, gas separation

485

———————————————————————————————

 

B. TABIŚ, W. STRYJEWSKI: Conditions for employing fluidized-bed bioreactors in aerobic processes
Inż. Ap. Chem. 2013, 52, 5, 487-489
Conditions for the application of two- and three-phase fluidized bed bioreactors in aerobic processes are presented in the paper. A method for the determination of recirculation ratio boundary values, substrate conversion degree and mean residence time of liquid in the installation is proposed. The presented method has a general nature and may be used for any aerobic process.
Keywords: bioreactor, fluidization, aerobic process, minimum recirculation

487

———————————————————————————————

 

M. TARADAICHENKO, F. GLADKII: Application of electromagnetic treatment in degumming process of sunflower oil with high phosphorus content
Inż. Ap. Chem. 2013, 52, 5, 490-491
The improvement of sunflower oils degumming process was analyzed in the paper. The electromagnetic field treatment was applied for degumming of sunflower oil with high phosphorus content. The new method of degumming compared with the standard water degumming reveals the following advantages: reduction of process duration time and improvement of final product quality.
Keywords: degumming, lecithin, sunflower oil, electromagnetic field

490

———————————————————————————————

 

M. TRZASKOWSKI, B. BUTRUK, T. CIACH: Modifications of polymer surface with the use of phospholipids
Inż. Ap. Chem. 2013, 52, 5, 492-493
The aim of this work was to create a clot-resisting coating on a surface of polymer used in the construction of artificial cardiovascular implants. This was achieved by an innovative use of phosphatidylcholine − a substance which naturally occurs in human body and forms a main component of cell membranes. The fabricated coating was proved to possess good antithrombogenic properties and thus can be possibly used in construction of cardiovascular implants.
Keywords: phosphatidylcholine, polyurethane, artificial cardiovascular implant, artificial cell membrane

492

———————————————————————————————

 

P. WACŁAWCZYK, J. HAPANOWICZ, R. ULBRICH: Experimental investigations of one- and two-phase pressure drop during flow in minichannels
Inż. Ap. Chem. 2013, 52, 5, 494-495
Results of experimental investigations of two-phase air − water mixture flow in horizontal quadratic minichannels with the hydraulic diameter from 2 to 6 mm are presented in the paper. The measured values were compared with calculated ones using the Lockhart-Martinelli and Chisholm methods. Accuracy of calculations with the standard deviation about 40% is close that obtained in conventional channels.
Keywords: two-phase flow, minichannels, pressure drop

494

———————————————————————————————

 

E. WOLAK: Chemical modification of activated carbons for energy storage systems
Inż. Ap. Chem. 2013, 52, 5, 496-497
Investigations dealing with active carbons obtained from vegetable precursors (activated carbon dust from charcoal activated by water vapour, activated carbon from peach stones obtained by their carbonization and activation using carbon dioxide, and finally commercial activated carbon produced from coconut shells activated by water vapour) additionally modified by KOH were carried out. As a result of this activation the sorptive material with significantly developed micro- and mesoporous structure and modified surface was obtained. The activation resulted in significant improvement of methanol sorption properties. The obtained carbon adsorbent can be advantageously used for heat storage purposes.
Keywords: activated carbon, chemical activation, energy storage system

496

———————————————————————————————

 

G. WOŁKOWYCKI: Experimental determination of the effectiveness of fixed matrix regenerator with innovative geometry
Inż. Ap. Chem. 2013, 52, 5, 498-500
A system with fixed matrix regenerator with an innovative packing shape used for waste heat recovery and working integrally with an open hearth glass furnace is presented in the paper. Based on the experimental data, it was shown how to determine the experimental effectiveness of regenerators for a real working object. Experimental results dealing with the effectiveness of regenerators tested and performed for the heating and cooling periods with the corresponding measured uncertainties are presented.
Keywords: effectiveness of fixed matrix regenerator, experimental effectiveness of regenerator

498

———————————————————————————————

 

R. WÓJTOWICZ, J. TALAGA, M. DYLĄG, J. KAMIEŃSKI, J. ROSIŃSKI, W. SZATKO: Numerical simulations and experimental investigations of liquid flow in a tubular reactor with a different width of baffles
Inż. Ap. Chem. 2013, 52, 5, 501-503
The goal of this work was the identification of liquid flow in a tubular reactor with a different width of baffles on basis of CFD simulations and Laser Doppler Anemometry (LDA) measurements. The results obtained can be used in practice during designing and optimisation of tubular reactors applied in coagulation and flocculation of colloids and solid particles of arduous settling suspensions in environmental protection and water treatment processes.
Keywords: mixing, tubular reactor, turbulent flow, turbulence parameters, CFD simulations, LDA measurements

501

———————————————————————————————

 

P. ZIĘTEK, B. BUTRUK, T. CIACH: Novel materials for cardiosurgery obtained via tissue engineering
Inż. Ap. Chem. 2013, 52, 5, 504-505
The aim of this work was to fabricate a novel material based on polyurethane coated with human endothelial cells. To promote endothelial cells adhesion, the surface of polyurethane was grafted with collagen in a 3-step chemical procedure. The procedure can be characterized as promising and simple. Endothelial cells anchored and proliferated on obtained materials confirmed the effectiveness of the proposed method of collagen grafting.
Keywords: biomaterials, polyurethane, endothelial cells

504

———————————————————————————————