TITLE: Liquid Hydrocarbon Fuels from Syngas. Eleventh Quarterly Report, September-November 1983.

INST.  AUTHOR: Union Carbide Corp., Tarrytown, NY. Tarrytown Technical Center.

SPONSOR: Department of Energy, Washington, DC.

LANGUAGE: English

PUB.  TYPE: Technical Report

PUB.  COUNTRY: United States

SOURCE: Department of Energy [DE],  1983,  315p.

NTIS ORDER NO.: DE84015941/INW

ABSTRACT:

The major part of this report is Appendix A, which contains detailed results of 12 runs with different catalysts. The results are very informative. The series of additives for cobalt catalysts has yielded another important modifier of cobalt activity. The chemistry of a previously identified additive was further explored in combination with a different shape selective component. The alternate means of combining the metal component and the shape selective component had dramatic effects on the stability and product distribution of the catalyst. Runs with the reference catalyst containing alpha -Al sub 2 O sub 3 pointed out the great changes in selectivity possible with slight temperature changes. Even the poor catalysts contributed to the understanding of cobalt Fischer-Tropsch catalysts. The low percentage of additive X sub 6 used in Catalyst 4 had a large effect on the catalyst's stability and final product distribution. The major disadvantage of most cobalt Fischer-Tropsch catalysts is excessive methane production. This additive reduced the methane yield significantly and also increased the yield of olefins significantly. A catalyst with enhanced properties was produced when the metal component and the shape selective component were put in more intimate contact as is shown in the results from Runs 7 and 8. The catalyst had extraordinary stability in both syngas conversion and product distribution. There was a slight deactivation during the first 140 hours on stream, but it was rock steady thereafter. Formation of the catalyst as 1/16-inch extrudates increased the catalyst's initial activity, especially the water gas shift activity. This method of formulation appears to be an outstanding way to combine a cobalt metal component and a shape selective component. (ERA citation 09:039815)

REPORT  NUMBER: DOE/PC/40077-T6

CONTRACT  NUMBER: AC22-81PC40077