TITLE: Slurry phase Fischer-Tropsch synthesis: Cobalt plus a water-gas shift catalyst. (Quarterly) report, April 1, 1990--June 30, 1990.

AUTHOR: I. C. Yates;   C. N. Satterfield.

INST.  AUTHOR: Massachusetts Inst. of Tech., Cambridge.

SPONSOR: Department of Energy, Washington, DC.

LANGUAGE: English

PUB.  TYPE: Technical Report

PUB.  COUNTRY: United States

SOURCE: Department of Energy [DE],  1990,  62p.

NTIS ORDER NO.: DE93006473INW

ABSTRACT:

Experiments on cobalt-catalyzed reactions of light 1-alkenes added to synthesis gas were performed. Data have been collected at 220C, 0.45 to 1.48 MPa and a synthesis gas flow rate between 0.015 and 0.030 Nl/(gcat(center dot)min) with H(sub 2)/CO of 1.45 to 2.25. Ethylene, propene, and butene were added to synthesis gas feed from 0.5 to 1.2 mole% of total feed. For each material balance in which 1-alkenes were added, a material balance was performed at similar process conditions without 1-alkenes added, as ''base case''. Material balances without added 1-alkenes were also repeated to verify of catalyst selectivity stability. 49 material balances were performed during a single run lasting over 2,500 hours-on-stream. The hydrocarbon data have been completely analyzed; data correlations are still being made. Since C(sub 3)/C(sub 1) ratios by ethene addition, C(sub 4)/C(sub 1) ratios by propene addition, and C(sub 5)/C(sub 1) ratios by 1-butene addition, it appears that 1-alkenes may  incorporate into growing chains on the surface of the catalyst. Further evidence for incorporation can be seen by comparing selectivity to n-alcohol one carbon number higher than added 1-alkene. Yield of this n-alcohol increases when alkenes are present. Sensitivity of hydrocarbon distribution to process variables seems to be greater on Co than on Fe catalysts.

REPORT  NUMBER: DOE/PC/79816-9

CONTRACT  NUMBER: AC22-87PC79816