Influence of support on surface basicity and catalytic activity in oxidative coupling of methane of Li–MgO deposited on different commercial catalyst carriers

✍ Scribed by Vasant R. Choudhary; Shafeek A. R. Mulla; Balu S. Uphade

• Publisher: Wiley (John Wiley & Sons)
• Year: 1998
• Tongue: English
• Weight: 212 KB
• Volume: 72
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/(sici)1097-4660(199806)72:2<99::aid-jctb877>3.0.co;2-s

✦ Synopsis

Deposition of LiÈMgO catalyst on commonly used supports (containing SiC, etc.) causes a drastic reduction in SiO 2 , Al 2 O 3 , ZrO 2

, HfO 2 , the catalytic activity/selectivity for the oxidative methane coupling reaction and also in both the total and strong surface basicity. The decrease in the catalytic activity/selectivity and basicity is attributed to strong chemical interactions between the catalyst and support which occur during the high temperature (750¡C) calcination/pretreatment of the catalyst. The chemical interactions result in catalytically less active binary and ternary metal oxides containing Li and/or Mg, thus deactivating the LiÈMgO catalyst by consuming its active components.

1998 SCI (