Mass Transfer in Chemical Engineering Processes

doi:10.5772/659

2011

DOI: 10.5772/659

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Mass Transfer in Chemical Engineering Processes

Abstract: Professor Jozef Markoš, born 1957 in Kremnica, Slovakia, is a full professor at Slovak University of Technology in Bratislava. He has over 30 years of research experience in the field of experimental and mathematical modelling, simulation, design and optimization of multiphase reactors and separations processes (heterogeneous catalysis, gas -liquid reactors, air lift bioreactors, reactive distillation, hybrid systems bioreactor -membrane separation) with several industrial realizations. His research and pedago… Show more

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Cited by 20 publications

References 236 publications

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Simulation of gas separation using partial element stage cut modeling of hollow fiber membrane modules

et al. 2017

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A mathematical model is developed to simulate a gas separation process using a hollow fiber membrane module. In particular, a new numerical technique is introduced based on flash calculation. Such analysis allows identifying the required membrane properties needed to reach module performance of interest. This model is validated for six different gas separation cases taken from literature. Then, the validated model is used to investigate the effect of O 2 and N 2 permeances on O 2 recovery and O 2 mole fraction in the permeate stream. A realistic two-stage air enrichment process is also proposed for O 2 production using an industrial module with different fibers numbers. Moreover, this model is used to simulate a natural gas purification process using a single unit to determine the required membrane separation area and CH 4 loss. Finally, a two-stage process is proposed to equally enhance CH 4 retentate mole fraction and decrease CH 4 loss.

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Simulation of gas separation using partial element stage cut modeling of hollow fiber membrane modules

et al. 2017

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Study on polybenzoxazinone membrane in pervaporation processes

Pulyalina

Polotskaya

Goĭkhman

et al. 2013

J of Applied Polymer Sci

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Poly(benz-3,1-oxazinone-4) was prepared by thermal cyclization of its hydrolytically stable precursor polyamic acid. Both polymer and its precursor were investigated as membrane materials. Thermogravimetric analysis and contact angle measurements were carried out for characterization of peculiarity of membrane compositions and analysis of membrane surface. Pervaporation of water-isopropanol mixture was studied in the wide range of feed composition. To interpret the pervaporation transport properties of the membranes, swelling experiments were performed, kinetic curves of sorption and desorption were plotted, and basic sorption and diffusion parameters were analyzed. It was established that poly(benz-3,1-oxazinone-4) membrane is extremely effective in dehydration of water-isopropanol mixture and shows high separation factor.

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Elucidating the Reaction Kinetics of Hydrophobic Porphyrin Nanoaggregates Dispersed in PVA Films Exposed to HCl Vapors

Iribarren

Maqueira

Valdés

et al. 2014

Int. J. Chem. Kinet.

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The behavior of the absorbance profiles of free‐base 5,10,15,20–tetraphenylporphyrin (TPPH2) and zinc 5,10,15,20‐tetraphenylporphyrinate (ZnTPP) under exposure to HCl vapors was investigated to establish in detail the mechanism of protonation of these porphyrinic compounds and their potential for use as HCl sensors. We show that the intensities of diprotonated tetraphenylporphyrin absorption bands that arise at 444–446 and 662–666 nm increase as a function of the HCl exposure time. Reactions of free‐base meso‐tetraphenylporphyrin protonating and of zinc meso‐tetraphenylporphyrinate demetalation and subsequent protonating are discussed, and the solutions of the corresponding kinetic equations and respective reaction rates are also obtained. Finally, from a theoretical analysis we deduce the presence of intermediated monoprotonated porphyrin that helps us to explain why the isosbestic point in the TPPH2 reaction with HCl is not well defined.

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Mass Transfer in Chemical Engineering Processes

Cited by 20 publications

References 236 publications

Simulation of gas separation using partial element stage cut modeling of hollow fiber membrane modules

Simulation of gas separation using partial element stage cut modeling of hollow fiber membrane modules

Study on polybenzoxazinone membrane in pervaporation processes

Elucidating the Reaction Kinetics of Hydrophobic Porphyrin Nanoaggregates Dispersed in PVA Films Exposed to HCl Vapors

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