DIRECT PARTIAL OXIDATION OF METHANE OVER ZSM-5 CATALYST - ZN-ZSM-5 CATALYST STUDIES

Citation
S. Han et al., DIRECT PARTIAL OXIDATION OF METHANE OVER ZSM-5 CATALYST - ZN-ZSM-5 CATALYST STUDIES, Catalysis letters, 29(1-2), 1994, pp. 27-32
Citations number
9
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemistry Physical
Journal title
ISSN journal
1011-372X
Volume
29
Issue
1-2
Year of publication
1994
Pages
27 - 32
Database
ISI
SICI code
1011-372X(1994)29:1-2<27:DPOOMO>2.0.ZU;2-4
Abstract
Extended studies on Zn-ZSM-5 catalyst for the production of liquid hyd rocarbons in the direct partial oxidation (DPO) of CH4 with O2 are rep orted. Previously, it was reported that metal-containing ZSM-5 catalys ts could produce C5+ hydrocarbons from pure CH4/O2 feeds without feed additives. Zn-ZSM-5 produced the highest C5+ yields of the catalysts t ested. This work shows that the method of introducing Zn onto the cata lyst, ion-exchange versus impregnation, does not significantly alter C 5+ yields if low Zn content is maintained (approximately 0.4-0.5 wt%). Liquid hydrocarbon yields in this system doubled after 8 h on stream while overall C2+ yields increased by over 300%. Mechanistic implicati ons of these findings are discussed. Finally, processing a natural gas feed over Zn-ZSM-5 gave higher C5+ yields over CH4 feed but these yie lds were not improved over previously published results using HZSM-5.