Optimum Catalytic Process for Alcohol Fuels from Syngas: Sixth Quarterly Technical Progress Report, April-June, 1988.

摘要

Objectives are to discover and evaluate the catalytic properties of combination catalytic systems for the production of alcohol fuel extenders from syngas, to evaluate analytically and on the bench scale novel reactor concepts for use in converting syngas to liquid fuel products, and to develop on the bench scale the best combination of chemistry, reactor, and total process configuration to achieve the minimum product cost for conversion of syngas to liquid fuel products. The study of additional additives to the homogeneous ruthenium catalyst in the search for improved activity continued. Certain Mo and Ir compounds slightly increased the selectivity to higher alcohols. Platinum, copper, and palladium compounds tested are severe catalyst poisons. Phosphine compounds tested either retard the catalyst activity slightly or completely poison the system. Chemical model studies have been carried out to investigate the mechanism of homogeneous hydrogenation of CO. Results indicate that the first interaction between hydrogen and CO could be a reaction between a metal hydride and an activated carbon monoxide ligand bonded to a metal center. Investigations into improving the performance of alkali-loaded molybdenum sulfide based catalysts have continued. Also, experiments have tested a number of alternative procedures for the preparation of fuel alcohol catalysts. None of the catalysts tested has been superior to the standard catalysts. MoS2 with higher surface area has been prepared by changing the ammonium tetrathiomolybdate preparation procedure and stopping the H2 S feed sooner. Catalysts prepared by low temperature calcination to first produce MoS3, then impregnating and calcining were little different from the standard except for slower a rate. Two catalysts were prepared from ammonium tetrathiomolybdate precipitated by a process yielding fine particles. Neither gave improved rate or selectivity. 14 figs., 8 tabs. (ERA citation 14:007559)