CATALYST COMPOSITION FOR THE SELECTIVE CONVERSION OF SYNTHESIS GAS TO LIGHT OLEFINS

摘要

A catalyst composition and process for preparing it and for using it to enhance the selectivity to light (C2 to C3) olefins in a Fischer-Tropsch conversion of synthesis gas is disclosed. The catalyst composition is an iron-based catalyst on an yttria/zirconia support. In a Fischer-Tropsch reaction the selectivity to ethylene may be enhanced by at least 20 mole percent and to propylene by at least 4 mole percent, in comparison with use of an otherwise identical catalyst that is free of yttria, in an otherwise identical Fischer-Tropsch reaction.

主权项

1. A catalyst for use in converting synthesis gas into olefins, comprising
iron, and optionally, an alkali metal, alkaline earth metal or a combination thereof, on a support comprising zirconia and yttria, the iron being present in an amount ranging from 1 weight percent to 20 weight percent, based on combined weight of the iron and the support; the yttria being present in an amount ranging from 1 mole percent to 95 mole percent, based on combined moles of yttria and zirconia, and the optional alkali metal, alkaline earth metal or combination thereof being present in an amount ranging from 0 mole percent to 6 mole percent, based on moles of the iron.