Abstract
Lower olefins are traditionally produced from cracking of naphtha and other crude oil fractions. The
Fischer–Tropsch-to-Olefins process (FTO) enables the direct synthesis of lower olefins from synthesis
gas (CO + H2) derived from alternative feedstocks such as natural gas, coal or biomass. A catalyst suitable
for this process must comply with different requirements: high selectivity for C2 C4 olefins, low methane
selectivity, high catalytic activity and excellent mechanical and chemical stability under demanding reaction
conditions (high temperatures and low H2/CO ratios). These features have been reported for a catalyst
consisting of iron-containing nanoparticles promoted with sodium and sulfur dispersed on a weakly
interactive support. In this study, Na plus S promoted -alumina supported catalysts with loadings of
1–20 wt% Fe have been prepared using different iron precursor salts to investigate their effects on catalytic
performance. The catalysts prepared from iron nitrate or ammonium iron citrate both consisted of
iron nanoparticles of 15-20 nm and displayed high selectivity to lower olefins (>50% C) in combination
with low methane selectivity (
Original language | English |
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Pages (from-to) | 95-102 |
Number of pages | 8 |
Journal | Catalysis Today |
Volume | 215 |
DOIs | |
Publication status | Published - 2013 |