Improved Catalysts for Liquid Hydrocarbon Fuels from Syngas. Second Quarter Technical Progress Report, January-March 1984

摘要

The objective of the contract is to consolidate the advances made during the the previous contract in the conversion of syngas to motor fuels using Molecular Sieve-containing catalysts and to demonstrate the practical utility and economic value of the new catalyst/process systems with appropriate laboratory runs. Results of the nine tests conducted during the quarter have provided insights into the development of the intimately contacted, cobalt/UCO-103, class of catalyst which should prove useful in guiding future work. Attempts at improving motor fuel quality by the incorporation of second shape-selective components into the cobalt/UCC-103 catalyst were unsuccessful. Problems with the testing of a UCC-107-containing catalyst were inconclusive, but a catalyst containing S115 showed no improved product quality. The metal additive X sub 7 was shown to have beneficial effects in reducing the production of methane, although it also greatly depressed the catalyst's conversion activity. The advantages of replacing cobalt as the active Fischer-Tropsch metal with X sub 3 was investigated. The X sub 3 catalysts showed desirable properties in the highly olefinic product and the higher relative activity per weight percent metal; however, the catalyst produced excessive methane and showed poor stability. A catalyst containing 17% cobalt produced an initial specific activity of 8; at the usual cobalt levels of 4 to 7%, the initial specific activity has rarely been as high as 2. This catalyst demonstrated the potential activity obtainable by increasing the cobalt concentration and removing any second shape-selective component, and further demonstrated the need for metal additives for stability. An attempt to regenerate this catalyst with oxygen - the first time this idea has been tested - proved unsuccessful. 109 figs., 8 tabs. (ERA citation 10:027003)