Zeszyt / Issue (20) 2016

Impact of the heat capacity of adsorbed phase on process performance in the capture of CO2 from flue gas using pressure swing adsorption

Authors: Marek Tańczyk, Manfred Jaschik, Krzysztof Warmuziński

Keywords: carbon dioxide abatement, flue gas, pressure swing adsorption, specific heat of adsorbed phase, critical temperature

Abstract: The present study aims at demonstrating how important it is to include the substantial increase in CO2 heat capacity around the critical temperature in the modelling of relevant PSA separations. It is shown that this parameter may considerably alter simulation results, especially in the cases when the adsorbed phase concentration is high, regeneration pressure is moderate and CO2 content in the enriched stream is large.

Theory of multicomponent diffusion in fluid systems

Authors: Andrzej Burghardt

Keywords: mechanical theory of multicomponent diffusion, generalized Maxwell-Stefan equation, generalized Fick-Onsager equation, nonequilibrium thermodynamics, statistical mechanics

Abstract: The aim of the study is to present in detail the constitutive equations of multicomponent diffusion de-rived on the basis of the mechanical theory of multicomponent diffusion. Various formulations of the diffu-sion driving force have been compared (generalized Maxwell-Stefan, generalized Fick-Onsager equations). Other theories of the multicomponent diffusion (nonequilibrium thermodynamics, statistical mechanics) have been also discussed.

VOC combustion on ceramic foam supported catalyst

Authors: Anna Gancarczyk, Marzena Iwaniszyn, Łukasz Mokrzycki, Wojciech Rojek, Dorota Duraczyńska, Tadeusz Machej, Jolanta Kowalska, Mieczysław Jaroszyński, Andrzej Kołodziej

Keywords: catalytic combustion, ceramic foam, solid foam morphology, reaction kinetics

Abstract: Open cellularceramic foam with the Mn-Cu catalyst layered was investigated in the toluene combustion process. Foam morphology was studied using computed microtomography. The results proved satisfactory functioning of the foam supported catalyst, better than the monolith supported one, probably due to more intense mass transfer of the foam-based reactor.

Purification of air from a two-component mixture of volatile organic compounds in a trickle-bed bioreactor

Authors: Rafał Sarzyński, Grażyna Bartelmus, Agnieszka Gąszczak

Keywords: trickle-bed bioreactor, styrene, p-xylene

Abstract: The efficiency of the process of air purification from the mixture of two volatile organic compounds (styrene and p-xylene) was experimentally tested. The experiment was carried out for 248 days in a pilot installation of a trickle-bed bioreactor, operating at co-current gas and liquid flow, changing in a wide range the concentrations of both organic substances in the air supplied to the bioreactor. Satisfactory efficiency of the process was obtained for the tested range of changes of the operational parameters: styrene conversion changed within the range of 80-95%, and the difficult to biodegradation p-xylene in the range of 40-55%.

Rating of utilization option of energy from coal mines ventilation air methane combustion for desalination plants

Authors: Krzysztof Gosiewski

Keywords: methane combustion, water desalination, ventilation air, energy recovery

Abstract: Combustion of lean methane contained in the hard coal mines ventilation air raises a problem of rational use of the obtained energy. An analysis of energy demand for various desalination methods was done. The paper presents a study of possibilities to utilize energy of the ventilation air methane for desalination of mine sewage in the cogeneration system, which fully exploits the produced heat and electrical energy.

The study on the separation of methane – nitrogen mixtures in commercial membrane modules

Authors: Krzysztof Warmuziński, Manfred Jaschik, Marek Tańczyk, Artur Wojdyła, Aleksandra Janusz-Cygan, Elżbieta Sołtys

Keywords: membrane separation, commercial membrane modules, ventilation air methane

Abstract: The basic aim of this study was to analyze the possibility of using commercial membrane modules to the removal of CH4 from ventilation air methane (VAM). Experimental investigations concerning the per-meation of pure gases (CH4, N2) and mixture of these gases, in three membrane modules, ware carried out. An important conclusion is that the UBE modules may successfully be used in the enrichment of dilute mixtures of methane and nitrogen.

Monolithic carbon dioxide hybrid adsorbents

Authors: Agnieszka Ciemięga, Katarzyna Maresz, Janusz J. Malinowski, Julita Mrowiec-Białoń

Keywords: CO2 adsorption, hierarchical silica monoliths

Abstract: New structural carbon dioxide sorbents based on supported polyamines onto silica monoliths with hierarchical pore structure were elaborated. Sorption capacity/type/amount of amine precursor relationships were studied. The results obtained were compared with the literature data relating to the sorption of CO2 on similarly modified powdered porous materials. The proposed carriers, in addition to a more usable form, showed improved sorption properties.

Cometabolic biodegradation of 4-chlorophenol by stenotrophomonas maltophilia KB2 strain

Authors: Elżbieta Szczyrba, Anna Szczotka, Grażyna Bartelmus, Agnieszka Gąszczak, Izabela Greń, Hanna Kolarczyk

Keywords: cometabolism, phenol, chlorophenol

Abstract: The cometabolic biodegradation of 4-chlorophenol by Stenotrophomonas maltophilia KB2 strain in the presence of phenol as the sole carbon and energy source was studied. The experiments were carried out in a batch bioreactor. The tests were conducted at 30°C, pH 7 and oxygenation maintained at the level of 5–7 mg·l-3. The effect of changes in initial concentration of both substrates on the rate of biomass growth and substrates transformation were analyzed. The initial concentration of phenol was changed within the range of 50–300 g·m-3 and 4-chlorophenol within the range of 25–100 g·m-3. The values of growth substrate transformation yield (W) and the f coefficient, indicating the fraction of reductant from phenol oxidation used to transform 4-chlorophenol, were also estimated.

Morphological parameters of solid foams – chalanges faced

Authors: Anna Gancarczyk, Marzena Iwaniszyn, Marcin Piątek, Bartosz Leszczyński, Grzegorz Ziółkowski, Daniel Piech, Bożena Janus, Tadeusz Kleszcz, Andrzej Kołodziej

Keywords: solid foam, morphological parameters, computed microtomography

Abstract: Morphological parameters of the solid foams have been determined using computed microtomography, optical microscopy and helium pycnometry. For the first technique, impacts were studied of the voxel size and method of the image binarization on the measured parameters. Morphological parameters derived were compared and the differences discussed.

Esterification of octanoic acid with n-octyl alcohol over enzymatic catalysts

Authors: Maria Kulawska, Wiesław Organek

Keywords: n-octyl alcohol, esterification, enzymatic catalysts

Abstract: Octyl octanoates were synthesized in the presence of commercially available enzymes NOVOZYM 435 i LIPOZYM Mm as catalysts in the range of concentration 0.313-1.25 of mass. %, at temperature 313-333 K, at initial mole substrate ratio (n-octyl alcohol to octanoic acid) 1/1, 3/1, 5/1. Preliminary experiments showed a possibility of synthesis of esters at relatively low reaction temperature of 323 K compared with the synthesis in the presence of classical chemicals.

Cu catalyst usage in a hydrogen production in the methanol decomposition process

Authors: Maria Madej-Lachowska, Henryk Moroz, Hildegarda Wyżgoł, Łukasz Hamryszak

Keywords: hydrogen production, methanol decomposition, copper catalysts

Abstract: The studies of Cu catalyst usage in a hydrogen production in the methanol decomposition process were performed. CuZnZr-based catalysts with Ga, Cr and Ce additives and CuZnAl-based ones promoted by Zr were investigated. The highest hydrogen yield was achieved with CuZnAl-Zr catalysts and CuZnZr-Ga ones. It was established that the catalyst produced by hydrotalcite method showed the best activity.

Absorption of carbon dioxide in packed column sprayed with ionic liquid. Part I – Experimental research

Authors: Adam Rotkegel, Zenon Ziobrowski

Keywords: CO2 absorption, packed column, ionic liquids

Abstract: The experimental study of CO2 absorption in ionic liquids: [Emim][Ac] and [Bmim][Ac] in packed bed column is presented. The influence of initial CO2 concentration, absorption temperature and water content in ionic liquid on removal efficiency was investigated. The results show that in the same experimental conditions ILs have comparable CO2 absorption capacities with amine solution. However ILs need much longer times to absorb the same amount of carbon dioxide from gas mixture.

Absorption of carbon dioxide in column sprayed with ionic liquid. Part II – Mathematical model and calculation results

Authors: Adam Rotkegel, Zenon Ziobrowski

Keywords: CO2 absorption, packed column, ionic liquids

Abstract: The mathematical model of carbon dioxide removal from gases in a packed column using ionic liquids [Bmim][Ac] and [Emim][Ac] was presented. Experimental data obtained in previous work was compared with calculations results carried out using developed mathematical model of the process with good agreement with experimental data.

You are here: Home Issue 20 (2016)