(68g) Fischer-Tropsch Cobalt Catalyst Activation and Handling Through Wax Enclosure Methods
AIChE Spring Meeting and Global Congress on Process Safety
2011
2011 Spring Meeting & 7th Global Congress on Process Safety
11th Topical Conference on Gas Utilization
Coal, Biomass and Natural Gas to Liquids II
Tuesday, March 15, 2011 - 5:00pm to 5:30pm
Fischer-Tropsch (F-T) synthesis is considered a gas to liquid process which converts syn-gas, a gaseous mixture of hydrogen and carbon monoxide, into liquids of various hydrocarbon chain length and product distributions. Cobalt based catalysts are used in the processing of F-T synthesis and are the focus of this paper. One key concern with handling cobalt based catalysts is that the active form of catalyst is in a reduced state, metallic cobalt, which oxidizes readily in air. In laboratory experiment, the precursor cobalt oxide catalyst is activated in a fixed bed at 350C then transferred into a continuous stirred tank reactor (CSTR) with inert gas. NASA has developed a process which involves the enclosure of active cobalt catalyst in a wax mold to prevent oxidation during storage and handling. This improved method allows for precise catalyst loading and delivery into CSTR. Preliminary results indicate similar activity levels in the F-T reaction in comparison to the direct injection method.
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