An improved microkinetic model for the water gas shift reaction on copper

Callaghan, Caitlin; Fishtik, Ilie; Datta, Ravindra; Carpenter, Michael K.; Chmielewski, Matthew; Lugo, Anibal

doi:10.1016/s0039-6028(03)00953-1

Cited by 81 publications

(81 citation statements)

References 22 publications

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“…Callaghan et al (2003) suggests a contact time of approximately 3-9 seconds for the reaction. Publications on newer composition of the catalysts and newer catalysts are continuously emerging.…”

Section: High Temperature Shift Catalystsmentioning

confidence: 99%

“…The typical composition of the catalyst are 68 -73 % ZnO, 15 -20% CuO, 9 -14 % Cr 2 O 3 , 2 -5 % Mn, Al and Mg oxides [Newsome, 1980] and 32-33% CuO, 34-53% ZnO, 15-33% Al 2 O 3 [Callaghan et al, 2003 andRhodes et al, 1995]. Recent catalysts can also be operated at medium temperatures of around 300 0 C. The active species in the catalyst is the copper metal crystallites.…”

Section: Low Temperature Shift Catalystsmentioning

confidence: 99%

“…Since the reduction reaction is exothermic, the catalyst should be exposed to the process stream at temperatures of 230 0 C and higher temperatures will lead to sintering of the catalyst [Callaghan et al, 2003]. Moreover the process stream should contain Hydrogen and steam is not preferable as condensation could affect the catalyst.…”

Section: Low Temperature Shift Catalystsmentioning

confidence: 99%

“…So to carry out the microkinetic simulation of the water gas shift reaction, the kinetics of the elementary steps can be used. The 18 step microkinetic model to explain the water gas shift reaction based on Cu (1 1 1) is given by Callaghan et al (2003), Fishtik and Dutta (2002) is listed out in Table 1. Table 1 Microkinetic model for forward water gas shift reaction on Cu(1 1 1) [Callaghan et al (2003), Fishtik and Dutta (2002) …”

Section: Micro Kinetic Modelsmentioning

confidence: 99%

See 3 more Smart Citations

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: High Temperature Shift Catalystsmentioning

confidence: 99%

Section: Low Temperature Shift Catalystsmentioning

confidence: 99%

Section: Low Temperature Shift Catalystsmentioning

confidence: 99%

Section: Micro Kinetic Modelsmentioning

confidence: 99%

See 2 more Smart Citations

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

“…The advantage of this method is that it can be effective at very low temperature (less than 100°C) and may be used simultaneously towards various air pollutants such as volatile organic compounds (VOCs). The catalysts most commonly studied in photocatalytic processes contain titanium dioxide [12,13]. The photocatalytic properties of TiO 2 are often modified by doping with another semi-conductive oxide or deposition of the metal phase on the surface.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic CO oxidation with water over Pt/TiO2 catalysts

Czupryn

Kocemba

Rynkowski

2017

Reac Kinet Mech Cat

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This paper reports that Pt/TiO 2 and to some extent, Pt/Al 2 O 3 and Pt/SiO 2 catalysts show some activity in the photocatalytic oxidation of CO by water at low temperature (\ 100°C) in the absence of oxygen. For Pt/TiO 2 catalysts, CO conversion is dependent on the Pt loading as well as the temperature of their reduction. There are an optimal platinum loading (5 wt%) and catalyst reduction temperature (500°C) ensuring the best photocatalytic efficiency. Catalytic performance results from the combined effects of electron-hole photogeneration and partial photodesorption of CO from the platinum surface, followed by the adsorption and subsequent dissociation of H 2 O. The probable mechanism of photooxidation of CO by H 2 O was proposed.

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Hydrogen Production and Synthesis Gas Reactions

Bartholomew

Farrauto²

2005

Fundamentals of Industrial Catalytic Processes

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An improved microkinetic model for the water gas shift reaction on copper

Cited by 81 publications

References 22 publications

A Review of the Water Gas Shift Reaction Kinetics

A Review of the Water Gas Shift Reaction Kinetics

Photocatalytic CO oxidation with water over Pt/TiO2 catalysts

Hydrogen Production and Synthesis Gas Reactions

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