Abstract
Fischer-Tropsch (F-T) catalysts with high activity (in the range 1 to 4 grams hydrocarbon per gram of iron per hour) and high selectivity for olefins have been produced using zeolite Y-supported iron carbonyl compounds. The catalysts accepte a hydrogen-poor synthesis gas without marked deactivation (five days on stream). Olefin selectivity depended on the acidity of the support and increased with time on stream up to a level of 90% in the C2–C7 range. The product distribution in the range C 3 C 20 obeyed the Anderson-Schulz-Flory (A-S-F) statistics in all cases For the HY-supported catalysts, a high iso/normal alkane ratio was observed due t an acid-promoted isomerization reaction of the primarily formed olefinic F-T products.
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