Lgdberg S. et al. - Hydrocarbon production via Fischer–Tropsch synthesis from H2-poor syngas over different Fe-Cog-Al2O3 bimetallic catalysts.pdf

Applied Catalysis B: Environmental 89 (2009) 167–182
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Applied Catalysis B: Environmental
journal homepage: ate/apcatb
Hydrocarbon production via Fischer–Tropsch synthesis from H2-poor syngas over
different Fe-Co/g-Al2O3 bimetallic catalysts
Sara Lo¨gdberg a, Dewi Tristantini b, Øyvind Borg c,1, Lars Ilver d,
Bo¨rje Gevert b,*, Sven Ja¨ra˚ s a, Edd A. Blekkan c, Anders Holmen c
a Royal Institute of Technology (KTH), Chemical Technology, S-100 44 Stockholm, Sweden
b Chalmers University of Technology, Department of Chemical and Biological Engineering, S-412 96 Gothenburg, Sweden
c Norwegian University of Science and Technology (NTNU), Department of Chemical Engineering, N-7491 Trondheim, Norway
d Chalmers University of Technology, Department of Applied Physics, S-412 96 Gothenburg, Sweden
ARTICLE INFO ABSTRACT
Article history: Fischer–Tropsch synthesis (FTS) at 20 bar and 483 K, with H2-poor syngas (H2/CO ratio = ) in order to
Received 15 May 2008
simulate gasified biomass, was performed over Al2O3-supported catalysts with various ratios of Fe:Co
Received in revised form 27 November 2008
(12 wt% bimetal) prepared by co-impregnation. Co was found to be incorporated into the Fe2O3 phase
Accepted 30 November 2008
after calcination, at least for the iron-rich samples, while no evidence of Fe incorporated into Co3O4 was
Available online 6 December 2008
found. Upon reduction, most probably FeCo alloys were formed in the iron-rich bimetallic samples. The
degree of reduction of the catalysts showed a non-linear behavior with respect to the Fe:Co ratio, but it is
Keywords:
obvious that Co increases the reducibility of Fe. Alloying Co with small/moderate amounts of Fe
Fischer–Tropsch synthesis
improved the FT pared to the 100% Co catalyst at low conversion levels. Alloying Fe with
H2-poor synthesis gas
small/moderate amounts of Co lowered the FT activity, but increased the relative water–gas-shift