Process design and solvent recycle for the supercritical Fischer-Tropsch synthesis

Journal Article · Wed Feb 01 04:00:00 EST 2006 · Energy and Fuels

DOI:https://doi.org/10.1021/ef050109y· OSTI ID:20701149

Linghu, Wensheng; Li, Xiaohong; Asami, Kenji; Fujimoto, Kaoru ^[1]

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1. University of Kitakyushu, Fukuoka (Japan). Department of Chemical Processes and Environments, Faculty of Environmental Engineering

A recycle reactor system for supercritical Fischer-Tropsch synthesis was successfully designed and tested. The new reactor system has these characteristics: (1) integration of supercritical Fischer-Tropsch reactions, natural separation of produced wax from liquid phase, and recycle of the solvent and (2) natural recycle of solvent driven by self-gravity. A 20% Co/SiO{sub 2} catalyst and n-hexane were used as a catalyst and supercritical fluid, respectively. The results show that the average CO conversion at the steady state was 45% with recycle and 58% without recycle. The lumped hydrocarbon products distribution did not have any obvious difference between with and without recycle operation; however, {alpha}-olefin content of products with recycle was lower than that without recycle. The XRD result indicates that most of the reduced cobalt remains in the metallic state during the Fischer-Tropsch reactions for both cases. 22 refs., 3 figs., 1 tab.

• OSTI ID: 20701149
• Journal Information: Energy and Fuels, Journal Name: Energy and Fuels Journal Issue: 1 Vol. 20; ISSN ENFUEM; ISSN 0887-0624
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CATALYSTS
CHEMICAL REACTORS
COBALT
DESIGN
FISCHER-TROPSCH SYNTHESIS
HEXANE
ORGANIC SOLVENTS
RECYCLING
SUPERCRITICAL STATE