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International Journal of Chemical Reactor Engineering

Ed. by de Lasa, Hugo / Xu, Charles Chunbao

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Effect of Operating Conditions for Higher Alcohols Synthesis from Synthesis Gas over Alkali-Modified Co-Rh-Mo Trimetallic Catalyst Supported on Multi-Walled Carbon Nanotubes

Venkateswara Rao Surisetty1 / Janusz Kozinski2 / Ajay K. Dalai3

1University of Saskatchewan,

2York University,

3University of Saskatchewan,

Citation Information: International Journal of Chemical Reactor Engineering. Volume 9, Issue 1, ISSN (Online) 1542-6580, DOI: 10.1515/1542-6580.2697, July 2011

Publication History

Published Online:
2011-07-06

The effects of operating conditions on the higher alcohols synthesis reaction from synthesis gas were studied in a single-pass tubular downflow fixed-bed reactor, using sulfided K-promoted trimetallic Co-Rh-Mo catalyst supported on multi-walled carbon nanotubes (MWCNTs). The p CO conversion increased monotonically with increasing reaction temperature (from 275 to 350°C) and pressure (from 800 to 1400 psi), while decreasing monotonically with increasing GHSV (from 2.4 to 4.2 m3 (STP)/(kg of cat./h)). To maximize the ethanol STY and selectivity, the optimum operating conditions were determined as 330°C, 1320 psi, and 3.8 m3 (STP)/kg of cat./h). Maximum ethanol STY and selectivity were obtained using gas with H2 to CO molar ratio around 1.25.

Keywords: higher alcohols; alkali-promoted MoS2 catalyst; multi-walled carbon nanotubes; Rh promoter; Co promoted; trimetallic catalyst; fixed bed reactor

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