Selective conversion of syngas to light olefins
Fischer–Tropsch process
Bifunctional catalyst
DOI:
10.1126/science.aaf1835
Publication Date:
2016-03-03T19:20:16Z
AUTHORS (19)
ABSTRACT
Although considerable progress has been made in direct synthesis gas (syngas) conversion to light olefins (C2(=)-C4(=)) via Fischer-Tropsch (FTS), the wide product distribution remains a challenge, with theoretical limit of only 58% for C2-C4 hydrocarbons. We present process that reaches C2(=)-C4(=) selectivity as high 80% and 94% at carbon monoxide (CO) 17%. This is enabled by bifunctional catalyst affording two types active sites complementary properties. The partially reduced oxide surface (ZnCrO(x)) activates CO H2, C-C coupling subsequently manipulated within confined acidic pores zeolites. No obvious deactivation observed 110 hours. Furthermore, this composite may allow use coal- biomass-derived syngas low H2/CO ratio.
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