Deactivation behaviors of hybrid Fischer–Tropsch catalysts in the production of middle distillate from synthesis gas in a dual-bed reactor

Deactivation behaviors of hybrid Fischer–Tropsch catalysts in the production of middle... Production of middle distillate (C10–C20) from synthesis gas (CO + H2) through hydrocracking of wax (>C21+) was carried out in a dual-bed reactor. Fischer–Tropsch catalyst (Co/TiO2) was used in the first-bed reactor to produce wax from synthesis gas, and a mesoporous Pd–alumina composite catalyst (Pd–Al2O3) was used in the second-bed reactor to produce middle distillate through hydrocracking of wax. Both Fischer–Tropsch synthesis function of Co/TiO2 catalyst and hydrocracking function of Pd–Al2O3 catalyst were deactivated during 100 h-hybrid Fischer–Tropsch synthesis reaction. It was revealed that deactivation behaviors of Co/TiO2 and Pd–Al2O3 catalysts were governed by different factors. Wax accumulation and Co sintering were responsible for deactivation of Co/TiO2 catalyst in the Fischer–Tropsch synthesis reaction. Loss of Pd dispersion and Pd surface area of Pd–Al2O3 catalyst was responsible for its decreased catalytic performance in the production of middle distillate through hydrocracking of wax. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Deactivation behaviors of hybrid Fischer–Tropsch catalysts in the production of middle distillate from synthesis gas in a dual-bed reactor

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Publisher
Springer Netherlands
Copyright
Copyright © 2010 by Springer Science+Business Media B.V.
Subject
Chemistry; Inorganic Chemistry ; Physical Chemistry ; Catalysis
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-010-0170-1
Publisher site
See Article on Publisher Site

Abstract

Production of middle distillate (C10–C20) from synthesis gas (CO + H2) through hydrocracking of wax (>C21+) was carried out in a dual-bed reactor. Fischer–Tropsch catalyst (Co/TiO2) was used in the first-bed reactor to produce wax from synthesis gas, and a mesoporous Pd–alumina composite catalyst (Pd–Al2O3) was used in the second-bed reactor to produce middle distillate through hydrocracking of wax. Both Fischer–Tropsch synthesis function of Co/TiO2 catalyst and hydrocracking function of Pd–Al2O3 catalyst were deactivated during 100 h-hybrid Fischer–Tropsch synthesis reaction. It was revealed that deactivation behaviors of Co/TiO2 and Pd–Al2O3 catalysts were governed by different factors. Wax accumulation and Co sintering were responsible for deactivation of Co/TiO2 catalyst in the Fischer–Tropsch synthesis reaction. Loss of Pd dispersion and Pd surface area of Pd–Al2O3 catalyst was responsible for its decreased catalytic performance in the production of middle distillate through hydrocracking of wax.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Sep 18, 2010

References

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