TITLE: Investigation of Sulfur-Tolerant Catalysts for Selective Synthesis of Hydrocarbon Liquids from Coal-Derived Gases. Final Technical Progress Report, September 19, 1979-October 22, 1984.

AUTHOR: C. H. Bartholomew.

INST.  AUTHOR: Brigham Young Univ., Provo, UT.

SPONSOR: Department of Energy, Washington, DC.

LANGUAGE: English

PUB.  TYPE: Technical Report

PUB.  COUNTRY: United States

SOURCE: Department of Energy [DE],  20 Oct 84,  64p.

NTIS ORDER NO.: DE85000648/INW

ABSTRACT:

The effects of support and of boron or potassium promoters on the adsorption properties, CO hydrogenation activity/selectivity behavior, and sulfur resistance of iron (and to a lesser extent cobalt) were investigated. Iron catalysts supported on alumina, silica, and silicalite and promoted with potassium were prepared by conventional impregnation techniques. Cobalt and iron borides were prepared by chemical reduction with NaBH sub 4 . The adsorptions of CO and H sub 2 on these catalysts were studied by static adsorption and temperature-programmed desorption techniques. Activity, selectivity, and sulfur-resistance during CO hydrogenation on these catalysts were determined using a laboratory microreactor. The results indicate that support, promoter, and catalyst pretreatment significantly influence adsorption, activity, selectivity, and sulfur resistance behavior of these catalysts. Hydrogen adsorption on these catalysts is highly activated; moreover the degree of activation varies with support, promoter and pretreatment. Specific activities of iron catalysts on different supports vary 40 fold; selectivities of these catalysts for CO sub 2 and different hydrocarbons also vary significantly with support. Calcination at 473 exp 0 K of potassium promoted Fe/silica shifts selectivity from conventional Fisher-Tropsch products (C sub 1 -C sub 10 hydrocarbons and CO sub 2 ) to mainly methane, ethylene and propylene. These and other significant results are presented and discussed. An account of technical communications and publications is also included. 24 references, 20 tables, 9 figures. (ERA citation 10:006545)

REPORT  NUMBER: DOE/ET/14809-13

CONTRACT  NUMBER: AC22-79ET14809