Methanation and water-gas shift reactions over Pt/CeO2

Mendelovici, Leonardo; Steinberg, M.

doi:10.1016/0021-9517(85)90381-1

Cited by 61 publications

(21 citation statements)

References 5 publications

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“…The Novel WGS catalysts active at low temperatures are normally based on platinum or gold. For many years, Pt/CeO 2 has been proven to be a very active WGS catalyst especially at high temperatures (Hilaire et al, 2004;Mendelovici and Steinberg, 1985;Swartz et al, 2001). However, the activity and stability of these ceria-supported catalysts need to be improved by optimizing the preparation conditions and formulations.…”

Section: Introductionmentioning

confidence: 96%

Effects of system parameters on the performance of CO2-selective WGS membrane reactor for fuel cells

Huang

2008

Journal of the Chinese Institute of Chemical Engineers

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Section: Introductionmentioning

confidence: 96%

Effects of system parameters on the performance of CO2-selective WGS membrane reactor for fuel cells

Huang

2008

Journal of the Chinese Institute of Chemical Engineers

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“…Even though industrially HTS and LTS catalysts are in used today, researchers are still focusing on the improved WGS catalysts to overcome demerits of the industrial catalysts [1][2][3][4][17][18][19][20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Low Temperature WGS Catalysts for Hydrogen Station and Fuel Processor Applications

Moon

2009

Catal Surv Asia

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Generally, water gas shift (WGS) reaction is a very important step in the industrial production of hydrogen, ammonia and other bulk chemicals utilizing synthesis gases. In this paper, we are reporting WGS reaction carried out in our research group for the application of hydrogen station and fuel processor. We prepared various Mo 2 C, PtNi-based and Cu-based catalysts for low temperature WGS reaction. The characteristics of the prepared catalyst were analyzed by N 2 physisorption, CO chemisorptions, XRD, SEM and TEM technologies, and compared with that of commercial Cu-Zn/Al 2 O 3 catalyst. It was found that prepared catalysts displayed reasonably good activity and thermal cycling stability than commercial LTS (Cu-Zn/ Al 2 O 3 ) catalyst. It was found that the deactivation of commercial LTS catalyst during the thermal cycling run at 250°C was caused by the sintering of active metal even though it shows high activity at less than 250°C. The deactivation of Mo 2 C catalyst during the thermal cycling run was caused by the transition of Mo d? , Mo IV and Mo 2 C on the surface of Mo 2 C catalyst to Mo VI (MoO 3 ) with the reaction of H 2 O in reactants. However, they showed higher stability than the commercial LTS catalyst during thermal cycling test. The Pt-Ni/CeO 2 catalyst after the thermal cycling shows slightly deactivation due to the sintering of Ni metal. Among Cu-based catalysts, it was found that CuMo/Ce 0.5 Zr 0.5 O 2 catalyst has higher WGS activity and stability over commercial LTS catalyst. The results suggested that Pt-Ni/CeO 2 and Cu-Mo/Ce 0.5 Zr 0.5 O 2 catalysts are desirable candidates for application in hydrogen station and fuel processor system even though all other catalysts deactivated slowly during the thermal cycling run.

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“…Besides this, the H 2 content in the reformate should be increased further. Considering the role of the precious metal Pt in the CO WGS reaction [15,27], it was introduced into the Ir/Ce 0.5 Zr 0.5 O 2 catalyst to eliminate CO while increasing the H 2 content, to some extent. 0.…”

Section: Performance Of the Ir-pt Bimetallic Catalystmentioning

confidence: 99%

Study of Catalysts for Hydrogen Production by the High Temperature Steam Reforming of Methanol

et al. 2006

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In the present study, a series of Ir‐based catalysts, supported on Al2O3, ZrO2, CeO2, and CexZr1‐xO2, are investigated for the production of hydrogen by the high temperature steam reforming of methanol (SRM). Results show that CeO2 and CexZr1‐xO2 can promote the CO water gas shift (WGS) reaction, which is involved in the SRM network. Ir/CeO2 exhibits a better initial methanol conversion and its stability can be enhanced by the addition of ZrO2 to CeO2. The TPR and XRD characterization of the CeO2‐ZrO2 mixed oxides shows that Ce0.5Zr0.5O2 is the optimum support in maintaining catalyst activity, as well as stability. The addition of the precious metal Pt to Ir/Ce0.5Zr0.5O2 demonstrates a synergistic effect and can obviously increase the selectivity of H2. In the meantime, the CO content in the reformate products decreases from 9 mol‐% to 6 mol‐%. Under the conditions of H2O/CH3OH=1.5 (molar ratio), LHSV=2.5 h–1, and a reaction temperature of 400 °C, a 92% methanol conversion is obtained during a 200 hour test on a 0.3%Ir‐0.3%Pt/Ce0.5Zr0.5O2 catalyst and the stability is better than that of a commercial copper‐based catalyst.

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Methanation and water-gas shift reactions over Pt/CeO2

Cited by 61 publications

References 5 publications

Effects of system parameters on the performance of CO2-selective WGS membrane reactor for fuel cells

Effects of system parameters on the performance of CO2-selective WGS membrane reactor for fuel cells

Low Temperature WGS Catalysts for Hydrogen Station and Fuel Processor Applications

Study of Catalysts for Hydrogen Production by the High Temperature Steam Reforming of Methanol

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