Stationary and transient kinetics of the high temperature water-gas shift reaction

Keiski, Riitta L.; Salmi, Tapio; Niemistö, Pekka; Ainassaari, Jorma; Pohjola, Veikko J.

doi:10.1016/0926-860x(95)00315-0

Cited by 104 publications

(80 citation statements)

References 18 publications

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“…Compared to the models in [2,7,13,15] and [22], the activation energy E a is higher. In these approaches, the activation energy values varied between 95 and 118 kJ mol −1 .…”

Section: The Improved Kinetic Modelmentioning

confidence: 87%

“…In addition, the presented value of factor a shows that the influence of the CO partial pressure is also higher (1.77 in this work versus about 1.0 in [2,13], and [22]). This could be explained by the low operating pressure in this work and, therefore, an even lower adsorption of CO on the catalyst surface.…”

Section: The Improved Kinetic Modelmentioning

confidence: 95%

“…Since the first applications of the WGS reaction catalyzed by an Fe-/Cr-based catalyst (compare [23]), several kinetic models, based on power laws, have been proposed by different authors, for example, in [2,3,9,13,20] and [22]. However, most of the investigations of Fe-/Cr-based WGS catalysts were carried out for product gas derived from coal gasification [10,11].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Development and experimental validation of a water gas shift kinetic model for Fe-/Cr-based catalysts processing product gas from biomass steam gasification

Kraussler

Hofbauer

2016

Biomass Conv. Bioref.

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This paper introduces an improved kinetic model for the water gas shift reaction catalyzed by an Fe-/Cr-based catalyst. The improved model is based on a former model which was developed previously in order to consider the composition and the catalyst poisons (H 2 S) of product gas derived from dual fluidized bed biomass steam gasification.Furthermore, this improved model has been validated with experimental data. The data was generated by a WGS reactor which employed a commercial Fe-/Cr-based catalyst and which processed real product gas from the dual fluidized bed biomass steam gasification plant in Oberwart, Austria. Basically, the validation showed good agreement of the measured and the calculated values for the gas composition (absolute errors of the volumetric fractions of up to 1.5 %) and the temperature profile (absolute errors of up to 21°C) of the WGS reactor. Of all considered gas components, the CO concentration showed the highest error.The results qualify the improved kinetic model for basic design and engineering of a WGS reactor employing a commercial Fe-/Cr-based catalyst which processes product gas from an industrial scale biomass steam gasification plant.

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“…Compared to the models in [2,7,13,15] and [22], the activation energy E a is higher. In these approaches, the activation energy values varied between 95 and 118 kJ mol −1 .…”

Section: The Improved Kinetic Modelmentioning

confidence: 87%

Section: The Improved Kinetic Modelmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development and experimental validation of a water gas shift kinetic model for Fe-/Cr-based catalysts processing product gas from biomass steam gasification

Kraussler

Hofbauer

2016

Biomass Conv. Bioref.

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“…The reported activation energies for the WGSR over magnetite/chromium oxide catalyst are in the range from 40 to 150 kJ/mol. 10,11 The lower activation energy obtained here, 74.7 kJ/mol, is believed to be caused by diffusional limitations in the catalyst particles as explained by Keiski et al 10 To investigate the reaction orders with respect to CO(g) and H 2 O(g), the CO 2 photoacoustic signals were measured at various partial pressures of CO and H 2 O. Figure 4 demonstrates the CO 2 photoacoustic signals measured at various Pco's at 300 o C and the reaction order with respect to CO determined from the reaction rates is 0.93.…”

Section: Resultsmentioning

confidence: 99%

In situ Photoacoustic Study of Water Gas Shift Reaction over Magnetite/Chromium Oxide and Copper/Zinc Oxide Catalysts

Byun

Choi

Choi³

et al. 2002

Bulletin of the Korean Chemical Society

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Kinetic studies on the water-gas shift reaction catalyzed by magnetite/chromium oxide and copper/zinc oxide were carried out by using an in situ photoacoustic spectroscopic technique. The reactions were performed in a closed-circulation reactor system using a differential photoacoustic cell at total pressure of 40 Torr in the temperature range of 100 to 350 o C. The CO 2 photoacoustic signal varying with the concentration of CO 2 during the catalytic reaction was recorded as a function of time. The time-resolved photoacoustic spectra obtained for the initial reaction stage provided precise data of CO 2 formation rate. The apparent activation energies determined from the initial rates were 74.7 kJ/mol for the magnetite/chromium oxide catalyst and 50.9 kJ/mol for the copper/zinc oxide catalyst. To determine the reaction orders, partial pressures of CO(g) and H 2 O(g) in the reaction mixture were varied at a constant total pressure of 40 Torr with N 2 buffer gas. For the magnetite/chromium oxide catalyst, the reaction orders with respect to CO and H 2 O were determined to be 0.93 and 0.18, respectively. For the copper/zinc oxide catalyst, the reaction orders with respect to CO and H 2 O were determined to be 0.79 and 0, respectively.

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“…Here, we only use Power Law (PL) model to describe the kinetics as it is the simplest empirical rate expression, which disdain any mechanism such as redox or Langmuir-Hinshelwood (LH). Likewise, several researchers have been reported using this kinetic model for high temperature WGSR, e.g., [11] and [12]. The PL model is given by:…”

Section: Wgsr Kineticsmentioning

confidence: 99%

Simulation and control of water-gas shift packed bed reactor with inter-stage cooling

Saw

Nandong

2016

IOP Conf. Ser.: Mater. Sci. Eng.

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Stationary and transient kinetics of the high temperature water-gas shift reaction

Cited by 104 publications

References 18 publications

Development and experimental validation of a water gas shift kinetic model for Fe-/Cr-based catalysts processing product gas from biomass steam gasification

Development and experimental validation of a water gas shift kinetic model for Fe-/Cr-based catalysts processing product gas from biomass steam gasification

In situ Photoacoustic Study of Water Gas Shift Reaction over Magnetite/Chromium Oxide and Copper/Zinc Oxide Catalysts

Simulation and control of water-gas shift packed bed reactor with inter-stage cooling

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