Migration of lithium along the fixed bed of Li/MgO and its consequences to the catalytic performance in oxidative coupling of methane

• Autorzy: Taniewski M. , Lachowicz A.
• Języki publikacji: EN

Abstrakty

EN

The migration of lithium along the bed of Li/MgO catalyst in oxidative coupling of methane has been investigated. A scaled-up stainless-steel tubular reactor with a fixed catalyst bed formed from two layers with different Li content was applied. It was discovered by AAS determination that the emission of volatile lithium compounds from the lithium rich working catalyst layer observed during its ageing, was followed with binding of emitted lithium by the poorer in lithium catalyst layer located below. Its consequences to the catalytic performance were studied. Under applied conditions, the main effect of the ageing of the catalyst was the decrease in C2 selectivity and the increase in COx selectivity, with only weak effect on methane conversion. It was found that the aged catalyst layer of low selectivity after its contact with the emission from the working fresh catalyst layer became more selective towards C2 formation. The phenomenon of migration of lithium should be taken into account in the efforts to prolong the period of effective work of the whole catalyst bed.

Słowa kluczowe

EN

methane; oxidative coupling; lithium catalyst; lithium migration

PL

metan; tlenowe sprzęganie; lit

• Wydawca: West Pomeranian University of Technology. Publishing House
• Czasopismo: Polish Journal of Chemical Technology
• Rocznik: 1999
• Tom: Vol. 1, nr 1
• Strony: 36--39
• Opis fizyczny: Bibliogr. 14 poz., tab., wykr.

Twórcy

autor

Taniewski M.

autor

Lachowicz A.

• Institute of Organic Chemistry and Technology, Silesian Technical University, 44-101 Gliwice, Poland, fax: [phone],