Simulation and optimisation of a rapid pressure swing reactor

Cheng, Y.S.; Alpay, E.; Kershenbaum, L.S.

doi:10.1016/s0098-1354(98)00037-4

Cited by 19 publications

(16 citation statements)

References 13 publications

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“…The models range from the simple "pressurized _ evacuation scheme" (Fig. 1 (a)) 7) to multiple step schemes such as pressurized _ (reaction) _ evacuation _ regeneration _ partially pressurized ( Fig. 1 (b)) 8) .…”

Section: P Re S S U Re S W I N G R E a C T O R I N I N T E G R A Tmentioning

confidence: 99%

Process Intensification of Dehydrogenation Reactions by Pressure Swing Reactor

Tagawa

2011

J. Jpn. Petrol. Inst.

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Integration of catalytic reaction and separation operations is important for process intensification (PI). Experimental studies on promotion of the dehydrogenation reaction using hydrogen adsorbent during catalytic dehydrogenation reaction were reviewed. The promotion effect was lost after saturation of the adsorbent, so that regeneration under reduced pressure was essential to start the reaction again. The developed reactor was the so-called pressure swing reactor (PSR) or pressure swing adsorption type reactor (PSA reactor) after the cyclic operations of pressurization and evacuation. Dehydrogenation of cyclohexane, and dehydroaromatization of n-hexane, propane and methane were investigated. Pt/Al2O3 _ CaNi5, Zn/H-ZSM-5 _ Mg51Zn20, Zn/H-ZSM-5 _ Ti fine powder, and Mo/H-ZSM-5 _ Ti fine powder catalysts showed high promotion effects. Because of the differences in reaction temperature, the recommended combination of catalyst and adsorbent varies depending on the reaction. Swing of partial pressure of hydrogen by inert purge gas regenerated the promotion effect showing the potential of the PSR for PI.

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Section: P Re S S U Re S W I N G R E a C T O R I N I N T E G R A Tmentioning

confidence: 99%

Process Intensification of Dehydrogenation Reactions by Pressure Swing Reactor

Tagawa

2011

J. Jpn. Petrol. Inst.

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“…Periodicity constraints state that the bed conditions must be identical at the end and the beginning of the cycle. This approach has been applied to periodic adsorption (Nilchan and Pantelides, 1998) and periodic adsorptive reaction (Cheng et al, 1998). They also give comparisons between the complete discretisation and the dynamic approaches with the conclusion that irrespective of the fact that each cycle of operation can be solved relatively quickly, the large number of cycles in the dynamic approach led to a larger overall computational time than the one-off direct determination of CSS using complete discretisation.…”

Section: Numerical Discretisation and Model Solutionmentioning

confidence: 99%

“…The H 2 O stream can be sent directly to the atmosphere. Past studies on the adsorptive reactor have exclusively focused mainly on reversible and endothermic reaction systems (see Alpay et al, 1994;Chatsiriwech et al, 1994;Carvill et al, 1996;Cheng et al, 1998;Sheikh et al,1998;Hufton et al, 1999;Yongsunthon and Alpay, 1999;Waldron et al, 2001;Xiu et al, 2000). However, the use of adsorptive reactors for irreversible exothermic reactions has received much less attention (Kodde, 2001;Davesac, 2004).…”

Section: Introductionmentioning

confidence: 99%

Adsorptive reactor technology for VOC abatement

Kolade

Kogelbauer

Alpay

2009

Chemical Engineering Science

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“…Many other experimental examples have been reported using the same concept with different names, that is, chromatographic reactors, adsorptive reactors, periodic separating reactors, pressure swing reactors, and so forth. Vaporciyan and Kadlec studied periodic separating reactors by equilibrium limited and reaction rate limited models on reversible and irreversible reactions involving 2–3 species.…”

Section: Introductionmentioning

confidence: 99%

“…Here a commercial Cu/ZnO/Al 2 O 3 catalyst from Sud‐Chemie, and K‐promoted hydrotalcite from Air Products and Chemicals, are used for our sorption enhanced WGS reactor study . For the sorption enhanced H 2 S decomposition reaction molybdenum disulfide powder from VENTRON GmbH is used as the catalyst . While there is no literature data available for elemental sulfur adsorption, however, there are patents mentioning the use of an admixture of catalyst and sulfur adsorbent for removing sulfur moieties from Claus tail‐gas.…”

Section: Introductionmentioning

confidence: 99%

Sorption enhanced reaction for high purity products in reversible reactions

Caram

2017

AIChE Journal

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Reversible reactions (A 1 B 5 C 1 D) can be performed to near completion using an admixture of catalyst and sorbent that will selectively adsorb one of the reaction products. For an initially clean sorbent and a favorable adsorption isotherm and a long reactor, the adsorbed product, C, will propagate as a sharp, shock-like front. While the adsorbed product will not move faster than this front, the second, nonadsorbed product, D, will, in principle, leave the reactor, uncontaminated. However, a parametric analysis of the two examples presented in this work, the water gas shift and the cracking of hydrogen sulfide, reveals an unexpectedly complex behavior. While assuming adsorption equilibrium the effect of the equilibrium constant, the reaction kinetics and adsorption isotherm on the reactant and product concentration profiles are simulated. It is found that desired behavior is favored by large equilibrium constants, rapid kinetics, and strong nonlinear adsorption. Figure 6. Effects of different K eq on the CO concentration profile inside the reactor when t 5 146 s, K r 5 2.039 mol/(sÁkgÁkPa) and K c 5 0.374 kPa 21 .

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Simulation and optimisation of a rapid pressure swing reactor

Cited by 19 publications

References 13 publications

Process Intensification of Dehydrogenation Reactions by Pressure Swing Reactor

Process Intensification of Dehydrogenation Reactions by Pressure Swing Reactor

Adsorptive reactor technology for VOC abatement

Sorption enhanced reaction for high purity products in reversible reactions

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