TITLE: Cation Promotion Effects in Zeolite-Supported F-T Catalysts.  Eleventh Quarterly Report, March-May 1986.

AUTHOR: J. G. Goodwin;   R. Oukaci;   C. S. Wu.

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],  Jun 86,  14p.

NTIS ORDER NO.: DE86012952/INW

ABSTRACT:

The main objectives of this study are: (1) to develop a better understanding of how neutralizing alkali cations in zeolites can affect F-T product selectivity over a supported metal; (2) to illuminate the effect of these cations on chemisorption properties, CO disproportionation, the mechanism of CO hydrogenation, and the deactivation characteristics; (3) to elaborate upon the effect of decreasing ionization potential of the alkali cations on the catalytic properties; and (4) to investigate the effects of Rb and Cs promotion.  During this past quarter, the effect of Si/Al ratio on the possible secondary reactions during CO hydrogenation were investigated with different zeolites, RuNaX, RuNaY, RuKY, RuKL, and RuNa-mordenite. These catalysts were prepared by ion-exchange and characterized by the same procedures described in previous reports. NaX, NaY, KL, and Na-mordenite were used as catalysts in butene reactions in order to eliminate the effect of Ru on the transformation of olefins. These reactions were carried out under similar conditions as those of CO hydrogenation for the series of ion-exchanged zeolite-supported Ru catalysts. In order to understand the olefin reactions over the acid sites in the ion-exchanged Ru zeolites, H mordenite was chosen for study because it has the highest Si/Al ratio, hence the strongest acid sites. Deactivation of H-mordenite was studied in detail for the propylene and butene reactions. 5 refs., 5 tabs. (ERA citation 11:003988)

REPORT  NUMBER: DOE/PC/60805-T11

CONTRACT  NUMBER: FG22-83PC60805