Effect of pre-reduction on carbon formation during steam reforming of methane over promoted and unpromoted Ni/Al2O3 catalysts

Jian Zheng, Wei Pan, Chunshan Song

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A commercial reforming catalyst promoted with K2O and CaO was used for the steam reforming of methane at different temperatures with different pre-reduction treatments. There was a significant effect of pre-reduction treatment on the carbon formation during steam reforming of methane over promoted Ni/Al2O3 catalyst. The partially reduced catalyst enhanced carbon formation when compared to fully reduced catalyst, possibly because some species in partially reduced catalyst (NiOx) acted to promote the initial carbon formation. There were no big differences among the activity and product yields of the same catalyst after different pre-reduction treatments, especially at 649°C. Although the partially reduced NiOx in the promoted reforming catalyst could be eventually fully reduced under high temperature reaction conditions, certain species in partially reduced catalyst might act as an active site for the initial carbon formation, which could be accumulated to become severe.

Original languageEnglish (US)
Pages (from-to)245-247
Number of pages3
JournalAm Chem Soc Div Fuel Chem Prepr
Volume47
Issue number1
StatePublished - Mar 2002

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Steam reforming
Methane
Catalysts
Carbon
Reforming reactions
Temperature

All Science Journal Classification (ASJC) codes

  • Energy(all)

Cite this

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abstract = "A commercial reforming catalyst promoted with K2O and CaO was used for the steam reforming of methane at different temperatures with different pre-reduction treatments. There was a significant effect of pre-reduction treatment on the carbon formation during steam reforming of methane over promoted Ni/Al2O3 catalyst. The partially reduced catalyst enhanced carbon formation when compared to fully reduced catalyst, possibly because some species in partially reduced catalyst (NiOx) acted to promote the initial carbon formation. There were no big differences among the activity and product yields of the same catalyst after different pre-reduction treatments, especially at 649°C. Although the partially reduced NiOx in the promoted reforming catalyst could be eventually fully reduced under high temperature reaction conditions, certain species in partially reduced catalyst might act as an active site for the initial carbon formation, which could be accumulated to become severe.",
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Effect of pre-reduction on carbon formation during steam reforming of methane over promoted and unpromoted Ni/Al2O3 catalysts. / Zheng, Jian; Pan, Wei; Song, Chunshan.

In: Am Chem Soc Div Fuel Chem Prepr, Vol. 47, No. 1, 03.2002, p. 245-247.

Research output: Contribution to journalArticle

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