TITLE: Iron Fischer-Tropsch catalysis: Properties of an ultrafine iron oxide catalyst. Quarterly progress report, July--September 1992.

AUTHOR: L. Xu;   S. Bao;   R. O'Brien;   D. Houpt;   B. H. Davis.

INST.  AUTHOR: Kentucky Univ., Lexington. Center for Applied Energy Research.

SPONSOR: Department of Energy, Washington, DC.

LANGUAGE: English

PUB.  TYPE: Technical Report

PUB.  COUNTRY: United States

SOURCE: Department of Energy [DE],  1992,  44p.

NTIS ORDER NO.: DE93008104INW

ABSTRACT:

A commercial Fe oxide with a particle size of 3 nm is now available. The FT requires considerable time on stream before steady state conditions are attained. Since it is desirable to obtain FT data for the smaller ultrafine Fe oxide catalysts at larger times on steam, data for operation up to 6 months were collected using slurry phase. Results show that the ultrafine Fe oxide maintain catalytic activity for a 150-day operating period. Addition of 0.5% K increased the activity; after 56 days, the activity had declined to and below that of unpromoted catalyst. Neither the unpromoted nor K-promoted catalyst exhibited good selectivity for alkenes.

REPORT  NUMBER: DOE/PC/90056-T8

CONTRACT  NUMBER: AC22-91PC90056