TITLE: Cation Promotion Effects in Zeolite-Supported F-T Catalysts. 9th Quarterly Report, September-November 1985.

AUTHOR: J. G. Goodwin;   R. Oukaci.

INST.  AUTHOR: Pittsburgh Univ., PA. Dept. of Chemical and Petroleum Engineering.

SPONSOR: Department of Energy, Washington, DC.

LANGUAGE: English

PUB.  TYPE: Technical Report

PUB.  COUNTRY: United States

SOURCE: Department of Energy [DE],  Dec 85,  19p.

NTIS ORDER NO.: DE86005373/INW

ABSTRACT:

An investigation into zeolite-supported F-T catalysts begun under Grant No. FG22-81PC40774 (Office of Fossil Energy, DOE) has produced results which suggest that alkali cations, remaining in a zeolite and serving to neutralize the structure, act to promote higher hydrocarbon formation. It appears that the F-T metal must be highly dispersed throughout the zeolite in the vicinity of these cations for this promotion effect to take place.  This effect is also highly dependent upon alkali cation concentration. The current research involves a study of the promotion effects of the neutralizing alkali cations on CO hydrogenation (under typical F-T conditions) over zeolite-supported Ru catalysts. The effect of zeolite acidity on the isomer distribution in the products of CO hydrogenation over ion-exchanged zeolite-supported Ru catalysts was investigated with various alkali cations (Li, Na, K, Rb, Cs). The transformation of olefins (propylene and butene), under similar conditions as those of CO hydrogenation, were also investigated in order to understand the effect of the various constituents of the support, i.e., the hydroxyl groups and the alkali cations, on the possible secondary reactions of the primary products of F-T synthesis. 19 refs., 1 fig., 4 tabs. (ERA citation 11:012865)

REPORT  NUMBER: DOE/PC/60805-T9

CONTRACT  NUMBER: FG22-83PC60805