The effect of Nb2O5 and ZrO2 additions on the behaviour of Li/MgO and Li/Na/MgO catalysts for the oxidative coupling of methane

D.J. McNamara, S.J. Korf, Kulathuiyer Seshan, J.G. van Ommen, J.R.H. Ross

Research output: Contribution to journalArticleAcademic

22 Citations (Scopus)
59 Downloads (Pure)

Abstract

Incorporation of Nb2O5 or ZrO2 into both Li/MgO and Li/Na/MgO systems produced ternary and quaternary catalysts, respectively, capable of attaining optimal C2 yields and selectivities at lower temperatures relative to the unpromoted materials. The degree of enhancement effected by these metal oxide additives was compared to that produced by Li/MgO and Li/Na/MgO catalysts promoted with SnO2 or Co3O4. At reaction temperatures < 700°C, the Li/Co/MgO ternary system showed marked differences in behaviour compared to the other ternary catalysts tested. This was particularly evident in the variation in C2 selectivity with time on stream during ageing studies of (i) untreated materials, (ii) materials pretreated in CO2, and (iii) materials dosed periodically with CHCI3.
Original languageUndefined
Pages (from-to)883-890
JournalCanadian journal of chemical engineering
Volume69
Issue number4
DOIs
Publication statusPublished - 1991

Keywords

  • Methane
  • Li/MgO
  • Li/Na/MgO
  • Oxidative coupling
  • metal oxide additives
  • IR-70929

Cite this