TITLE: Fischer-Tropsch Slurry Phase Process Variations to Understand Wax Formations: Quarterly Report for Period October 1, 1987 to December 31, 1987.

AUTHOR: 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],  1987,  29p.

NTIS ORDER NO.: DE88007210/INW

ABSTRACT:

Effects of high syngas conversion on the secondary reactions of olefins formed by Fischer-Tropsch synthesis on a reduced fused magnetite catalyst were simulated by studies of olefins in the presence of hydrogen and low concentrations of CO, or none at all. Kinetic models were developed for the effect of CO partial pressure on hydrogenation rates at 232/degree/C and 0.30 to 0.79 MPa. In the absence of carbon monoxide, olefin hydrogenation was more rapid than in its presence. A model indicated that a hydrogenated carbon monoxide species on the catalyst may be responsible for the inhibition of olefin hydrogenation, and that olefin adsorption is rate-limiting. The formation of secondary olefins appeared to follow similar trends with carbon monoxide partial pressure. Olefin incorporation was not observed in the small amount of Fischer-Tropsch products obtained in these experiments. The chain growth probability, alpha, appeared to correlate with the H sub 2 CO feed ratio. 14 refs., 13 figs., 1 tab. (ERA citation 13:030171)

REPORT  NUMBER: DOE/PC/80015-9

CONTRACT  NUMBER: AC22-85PC80015