Water–gas shift reaction over porous catalyst: temperature and reactant concentration distribution

Levent, Menderes

doi:10.1016/s0360-3199(00)00116-6

Cited by 28 publications

(12 citation statements)

References 3 publications

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“…The difference in opinion on the nature of kinetics for the water gas shift reaction has been attributed to the presence of impurities, mass transfer limitations, experiments carried out at atmospheric pressure and the use of integral reactor for kinetic studies rather than the differential reactor [Levent, 2001]. Since all the experiments were reported at atmospheric pressures, the kinetic models can be corrected for pressure using the modification recommended by Rase (1977) which also takes care of the diffusional effects of the catalysts or the pressure correction factor of Singh and Saraf (1977).…”

Section: Temkin Modelmentioning

confidence: 99%

A Review of the Water Gas Shift Reaction Kinetics

J¹,

Loganathan²,

Shantha³

2010

International Journal of Chemical Reactor Engineering

204

154

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The world's progression towards the Hydrogen economy is facilitating the production of hydrogen from various resources. In the carbon based hydrogen production, Water gas shift reaction is the intermediate step used for hydrogen enrichment and CO reduction in the synthesis gas. This paper makes a critical review of the developments in the modeling approaches of the reaction for use in designing and simulating the water gas shift reactor. Considering the fact that the rate of the reaction is dependent on various parameters including the composition of the catalyst, the active surface and structure of the catalyst, the size of the catalyst, age of the catalyst, its operating temperature and pressure and the composition of the gases, it is difficult to narrow down the expression for the shift reaction. With different authors conducting experiments still to validate the kinetic expressions for the shift reaction, continuous research on different composition and new catalysts are also reported periodically. Moreover the commercial catalyst manufacturers seldom provide information on the catalyst. This makes the task of designers difficult to model the shift reaction. This review provides a consolidated listing of the various important kinetic expressions published for both the high temperature and the low temperature water gas shift reaction along with the details of the catalysts and the operating conditions at which they have been validated.

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Section: Temkin Modelmentioning

confidence: 99%

A Review of the Water Gas Shift Reaction Kinetics

J¹,

Loganathan²,

Shantha³

2010

International Journal of Chemical Reactor Engineering

204

154

View full text Add to dashboard Cite

show abstract

“…Modeling of spatio-temporal evolution may serve as a powerful complementary tool to experimental non-isothermal reaction-diffusion (RD) systems within a porous catalyst particle and membrane (Weisz and Hicks, 1962, Hlavecek et al, 1969, Aris, 1975, Froment and Bischoff, 1979, Dekker et al, 1995, Pan and Zhu, 1998, Levent et al, 1998, Levent, 2001, Kafarov et al, 1998and Burghardt and Berezowski, 2003Selegny et al, 1995a andSelegny et al, 1995b). Non-isothermal RD systems represent thermodynamically and mathematically coupled transport and chemical processes, and need a through analysis, as they may evolve multiple steady states with unique dynamic phenomena (Burghardt and Berezowski, 2003).…”

Section: Introductionmentioning

confidence: 99%

Non-isothermal reaction-diffusion systems with thermodynamically coupled heat and mass transfer

Demi̇rel

2006

Chemical Engineering Science

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“…Prior research efforts directed at improving the performance of the WGS reaction have focused on a broad range of issues including the development of better catalysts [2], [3,4], and heat and mass transfer studies in adiabatic/isothermal reactors [5]. In 1999, Tonkovich et al investigated microchannel reactors with small parallel flow paths (100-1000 m in width, with aspect ratios (channel height to width) between 1:1 and 100:1, and lengths of 1-10 cm) using monolithic catalysts fabricated on nickel foam monolith supports [1].…”

Section: Introductionmentioning

confidence: 99%