ISSN:
1572-879X
Keywords:
oxidative coupling of methane
;
OCM
;
silica phase transition
;
alkalis
;
ethylene selectivity
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract During calcination of OCM catalyst precursors, Li...Cs spectacularly lower the amorphous silica → α-cristobalite phase transition temperature, shown here to be a critically important requirement for production of effective catalysts. Incorporation of W switches on OCM activity and newly discovered K/W and Rb/W formulations exhibit unsurpassed ethylene selectivity at high methane conversion. Addition of Mn significantly improves the performance of the former. An alkali-stabilised tungsten oxo species is thought to be the OCM active site.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1019072512423
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