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Process intensification in gas-to-liquid reactions: plasma promoted Fischer-Tropsch synthesis for hydrocarbons at low temperatures and ambient pressure

Lookup NU author(s): Wail AL-HARRASI, Dr Kui Zhang, Professor Galip Akay

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Abstract

The Fischer-Tropsch synthesis (FTS) for the conversion of carbon monoxide and hydrogen to higher hydrocarbons was investigated over a supported Cu/Co catalyst promoted by dielectric-barrier discharges (DBDs) at relatively low temperatures and ambient pressure. The effect of plasma power, operation pressure, and H-2/CO molar ratio on the activity and selectivity of the catalyst in a DBD reactor were studied. The fresh and used catalyst samples were characterized by scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray, and X-ray diffraction. We also used DBDs in catalyst preparation as a technique to enhance metal distribution on the catalyst support. The present study reveals that plasma can promote the FTS over a Cu/Co-based catalyst at low temperatures and ambient pressure. The formation of methane was strongly suppressed in plasma. In contrast to conventional FTS, CO conversion was higher at low operating pressure than that at higher pressure in the DBD-promoted FTS, which indicates the presence of a new reaction path for FTS.

Publication metadata

Author(s): Al-Harrasi WSS, Zhang K, Akay G

Publication type: Article

Publication status: Published

Journal: Green Processing and Synthesis

Year: 2013

Volume: 2

Issue: 5

Pages: 479-490

Print publication date: 01/10/2013

ISSN (print): 2191-9542

ISSN (electronic): 2191-9550

Publisher: Walter de Gruyter GmbH

URL: http://dx.doi.org/10.1515/gps-2013-0067

DOI: 10.1515/gps-2013-0067

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