Low CO_2 selective iron based Fischer-Tropsch catalysts for coal based polygeneration

摘要

Integration of electricity generation with liquid fuel production is a viable strategy towards maximising coal utilisation and hydrocarbon supply. Herein we report on catalyst design for process intensification and optimisation of electricity and hydrocarbon production from coal. Low temperature Fischer-Tropsch synthesis with Fe-Zn (Zn/Fe ratio 0.25) based catalysts using H_2-deficient syngas feed displayed unprecedented low CO_2 selectivity. Promotion of the Fe-Zn with Cu and Ca afforded Fischer-Tropsch product distributions that are typical of high temperature Fischer-Tropsch synthesis. The present report provides foundation for design of iron based catalyst that can compete with cobalt based once in terms of low CO_2 selectivity.