Abstract
The CO conversion rate and the product selectivities for the conversion of syngas typical of one derived from coal (H 2/CO = 0.7) or natural gas (H 2/CO = 1.7) are very similar over the range of 30–90% CO conversion levels. For CO conversions up to about 50%, the iron catalyst is as or more productive than a similar mass of supported cobalt catalyst. A supported iron catalyst may exhibit about two-thirds the productivity, on a gram Fe basis, as an unsupported catalyst. Furthermore, whereas the unsupported iron catalyst disintegrates within 24 h of synthesis, the supported catalyst retains its integrity during hundreds of hours of slurry phase operation. Silica based catalysts exhibited less disintegration in the CSTR than alumina based catalysts.
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