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- W225810934 abstract "Medium-pore (diameter approx. 6 A) zeolites such as ZSM-5 and Silicalite impregnated with Group VIII metals provide selective catalytic pathways for the conversion of coal-derived synthesis gas to gasoline or olefins. Moessbauer and magnetic studies on these catalysts containing iron or iron plus cobalt are reported. The zeolites were impregnated with metal nitrate solutions, reduced, and carbided to yield the active catalyst. The freshly impregnated samples showed Fe/sup 3 +/ type spectra. The ZSM-5 (14.7% Fe) and Silicalite (13.6% Fe) samples exposed to H/sub 2/(450/sup 0/C) showed an approximate 85% reduction to the metallic state. The carbided ZSM-5 (14.7% Fe) revealed a spectrum of Hagg carbide (Fe/sub 5/C/sub 2/), an active component of the catalyst. The used catalysts showed mixtures of Hagg carbide (Fe/sub 5/C/sub 2/) and cementite (Fe/sub 3/C). It is suggested that the selectivity of ZSM-5 (5.6% Fe, 4.5% Co) resulted from iron-cobalt alloy formation. 11 figures, 3 tables." @default.
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- W225810934 date "1980-07-22" @default.
- W225810934 modified "2023-09-22" @default.
- W225810934 title "Moessbauer and magnetic studies of bifunctional medium-pore zeolite-iron catalysts used in synthesis gas conversion" @default.
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