TITLE: Catalyst and process development for synthesis gas conversion to isobutylene. Quarterly report, April 1, 1992--June 30, 1992.

AUTHOR: R. G. Anthony;   A. Akgerman.

INST.  AUTHOR: Texas A and M Univ., College Station. Kinetics, Catalysis, and Reaction Engineering Lab.

SPONSOR: Department of Energy, Washington, DC.

LANGUAGE: English

PUB.  TYPE: Technical Report

PUB.  COUNTRY: United States

SOURCE: Department of Energy [DE],  27 Jul 92,  41p.

NTIS ORDER NO.: DE93007561INW

ABSTRACT:

A rate equation for carbon monoxide consumption showing first order in CO and 0.5 order in hydrogen indicates the rate controlling step involves dissociated hydrogen. The inhibition of the rate with carbon dioxide is also shown. Examination of the hydrocarbon distributions indicates a see-saw effect with the C(sub 4)s representing the fulcrum and methane and C(sub 5)(sup +) the end points. The shift in the distributions tends to be towards the C(sub 5)(sup +) for high pressures and long residence times.  This distribution can be shifted by incorporating Ti into the catalysts, but the optimum amount of Ti needs to be determined. The sol gel method of preparing the catalysts tends to produce a less active catalyst than by precipitation of a zirconyl salt. The most active catalyst contained approximately 2% Th/ZrO(sub 2)

REPORT  NUMBER: DOE/PC/90045-T6

CONTRACT  NUMBER: AC22-90PC90045