Oxidative conversion of methane to syngas over LaNiO{sub 3} perovskite with or without simultaneous steam and CO{sub 2} reforming reactions: Influence of partial substitution of La and Ni
- National Chemical Lab., Maharastra (India)
Selective partial oxidation of methane to syngas over LaNiO{sub 3}, La{sub 0.8}Ca(or Sr){sub 0.2}NiO{sub 3} and LaNi{sub 1-x}Co{sub x}O{sub 3} (where x = 0.2-1) perovskites at extremely short contact time ({approx}0.8 ms) has been investigated. Also, simultaneous oxidative conversion and steam and CO{sub 2} reforming of methane to syngas over LaNiO{sub 3} at short contact time ({approx}9 ms) has been studied at different temperatures and CH{sub 4}/O{sub 2} feed ratios. The catalysts, before and after reaction, were characterized by XRD and SEM. La NiO{sub 3} perovskite shows high activity and selectivity in the oxidative conversion of methane to syngas. However, the partial substitution of its La by Ca or Sr and also the partial or complete substitution of its Ni by Co causes a large decrease in both its activity and its selectivity. LaNiO{sub 3} is transformed to its catalytically active form, Ni{sup 0}/La{sub 2}O{sub 3}, during the initial period of the process. This catalyst shows very good performance in the simultaneous oxidative conversion (which is exothermic) and steam and CO{sub 2} reforming reactions (which are endothermic) of methane to syngas, at short contact time, operating in a most energy efficient manner and also requiring only a little or no external energy. 34 refs., 7 figs., 1 tab.
- OSTI ID:
- 501841
- Journal Information:
- Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 2 Vol. 163; ISSN 0021-9517; ISSN JCTLA5
- Country of Publication:
- United States
- Language:
- English
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