TITLE: Investigation of Sulfur-Tolerant Catalysts for Selective Synthesis of Hydrocarbon Liquids from Coal-Derived Gases. Annual Technical Progress Report, September 19, 1980-September 18, 1981.

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],  31 Oct 81,  59p.

ABSTRACT:

During the past contract year, considerable progress was made in characterization and activity/selectivity testing of iron and cobalt catalysts. Preparation of boride promoted cobalt and iron catalysts was refined and nearly completed. H sub 2 and CO adsorption and oxygen titration measurements were performed on a number of supported and unsupported catalysts, especially several boride promoted cobalt and iron catalysts. Activity/selectivity tests of 3 and 15% Fe/SiO sub 2 and Co/SiO sub 2 and of 6 borided cobalt and iron catalysts were completed. The product distributions for iron and cobalt boride catalysts are unusual and interesting. Boron promoted iron is more active and stable than iron/silica; cobalt boride has an unusually high selectivity for alcohols.  Tests to determine effects of H sub 2 S poisoning on activity/selectivity properties of 15% Co/SiO sub 2 indicate that a significant loss of activity occurs over a period of 24 to 28 h in the presence of 10 to 20 ppM H sub 2 S. Product selectivity to liquids increased through a maximum during the gradual addition of sulfur. Reactant CO and H sub 2 S interact partially to form COS which is less toxic than H sub 2 S. H sub 2 and CO adsorption data were obtained for 3, 6 and 9% Co/ZSM-5 catalysts prepared and reactor tested by PETC. The unusual and interesting results suggest that metal-support interactions may have an important influence on reactant adsorption properties.

REPORT  NUMBER: DOE/ET/14809-8

CONTRACT  NUMBER: AC22-79ET14809