Patents

The invention relates to the synthesis of alkali or alkaline earth metal or metal oxide and copper or oxides of copper promoted alumina supported iron catalysts by conventional successive impregnation on commercial alumina support using chloride precursors of all or at least one of the nietals or by external addition/doping of C1 and thereby utilizing the materials for improved synthesis of short chain olefins (C2-C4) from syngas in a single step Fischer-Tropsch process, FTO in presence of CO2 as co-feed. The efficient chlorided supported iron materials are very attractive as catalytic system for the direct synthesis of lower olefin (C2-C4) from syngas under hydrogen deficient condition at selectivity of up to 75% at CO conversion up to 90% with syngas having H2 to CO or H2 to CO+C02 molar ratio 0.5 to 1.0, at conditions of temperature, pressure and GHSV of 340-350 degree C, 10-15 bar and 2000-5000 mlh"Vg"1 respectively.