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Int. J. Mol. Sci. 2010, 11(4), 1343-1351; doi:10.3390/ijms11041343
Article

Gas-Phase Synthesis of Dimethyl Carbonate from Methanol and Carbon Dioxide Over Co1.5PW12O40 Keggin-Type Heteropolyanion

* ,  and
Department of Chemistry, King Saud University, P.O. Box 2455, Riyadh-11451, Saudi Arabia
* Author to whom correspondence should be addressed.
Received: 22 January 2010 / Revised: 9 March 2010 / Accepted: 29 March 2010 / Published: 31 March 2010
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Abstract

The reactivity of Co1.5PW12O40 in the direct synthesis of dimethyl carbonate (DMC) from CO2 and CH3OH was investigated. The synthesized catalyst has been characterized by means of FTIR, XRD, TG, and DTA and tested in gas phase under atmospheric pressure. The effects of the reaction temperature, time on stream, and methanol weight hourly space velocity (MWHSV) on the conversion and DMC selectivity were investigated. The highest conversion (7.6%) and highest DMC selectivity (86.5%) were obtained at the lowest temperature used (200 °C). Increasing the space velocity MWHSV increased the selectivity of DMC, but decreased the conversion. A gain of 18.4% of DMC selectivity was obtained when the MWHSV was increased from 0.65 h-1 to 3.2 h-1.
Keywords: heteropolyanion; Keggin structure; methanol; dimethyl carbonate; direct synthesis; carbon dioxide heteropolyanion; Keggin structure; methanol; dimethyl carbonate; direct synthesis; carbon dioxide
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Aouissi, A.; Al-Othman, Z.A.; Al-Amro, A. Gas-Phase Synthesis of Dimethyl Carbonate from Methanol and Carbon Dioxide Over Co1.5PW12O40 Keggin-Type Heteropolyanion. Int. J. Mol. Sci. 2010, 11, 1343-1351.

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