Middle distillates production via Fischer–Tropsch synthesis with integrated upgrading under supercritical conditions

Zhang, Sihe, Rui Xu, Ed Durham, and Christopher B. Roberts. 2014. AIChE Journal 60 (7): 2573–83. doi:10.1002/aic.14493.

Type Journal Article
Author Sihe Zhang
Author Rui Xu
Author Ed Durham
Author Christopher B. Roberts
URL http://dx.doi.org/10.1002/aic.14493
Volume 60
Issue 7
Pages 2573-2583
Publication AIChE Journal
ISSN 1547-5905
Date May 22, 2014
Journal Abbr AIChE J.
DOI 10.1002/aic.14493
Abstract A vertically aligned fixed-bed reactor system with a cascade of three sequential catalyst beds has been used to incorporate Fischer–Tropsch synthesis (FTS) in the first bed, oligomerization (O) in the second bed, and hydrocracking/isomerization (HC or C) in the third bed (FTOC). Compared to gas phase FTS (GP-FT) alone, gas phase FTS with the subsequent upgrading beds (GP-FTOC) is demonstrated to result in a reduction in the olefin selectivity, a reduction in the C26+ selectivity, and a marked enhancement in the production of branched paraffins and aromatics. Utilization of supercritical hexane as the reaction medium in supercritical FTS (SC-FT) and supercritical phase FTOC (SC-FTOC) resulted in a significant reduction in both CH4 selectivity and CO2 selectivity. Interestingly, significant amounts of aldehydes and cyclo-paraffins were collected in SC-FT and in SC-FTOC, respectively, while not being observed in traditional gas phase operation (both GP-FT and GP-FTOC). © 2014 American Institute of Chemical Engineers AIChE J, 60: 2573–2583, 2014

Keywords:

 

  • Carbon
  • Carbon Dioxide
  • Catalysts
  • Fischer–Tropsch synthesis
  • Fuels
  • Hydrocarbons
  • hydrocracking
  • Isomerization
  • Liquids
  • Middle distillates
  • Multibed reaction system
  • Oligomerization
  • Paraffin
  • Products
  • Supercritical phase conditions
  • Transport

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