Int. J. Mol. Sci. 2010, 11(7), 2770-2779; doi:10.3390/ijms11072770
Article

Reactivity of Heteropolytungstate and Heteropolymolybdate Metal Transition Salts in the Synthesis of Dimethyl Carbonate from Methanol and CO2

1 Department of Chemistry, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia 2 Petrochemical Research Chair, Department of Chemistry, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
* Author to whom correspondence should be addressed.
Received: 24 May 2010; in revised form: 24 June 2010 / Accepted: 12 July 2010 / Published: 23 July 2010
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Abstract: A series of Keggin-type heteropoly compounds (HPC) having different countercations (Co, Fe) and different addenda atoms (W, Mo) were synthesized and characterized by means of Fourier-Transform Infrared Spectrometer (FT-IR) and X-ray powder diffraction (XRD). The catalytic properties of the prepared catalysts for the dimethyl carbonate (DMC) synthesis from CO2 and CH3OH were investigated. The experimental results showed that the catalytic activity is significantly influenced by the type of the countercation and addenda atoms transition metal. Among the catalysts examined, Co1.5PW12O40 is the most active for the DMC synthesis, owing to the synergetic effect between Co and W. Investigating the effect of the support showed that the least acidic one (Al2O3) enhanced the conversion but decreased the DMC selectivity in favor of that of methyl formate (MF), while that of dimethoxy methane remained stable.
Keywords: heteropoly compounds; dimethyl carbonate; Keggin structure; carbon dioxide

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MDPI and ACS Style

Aouissi, A.; Al-Deyab, S.S.; Al-Owais, A.; Al-Amro, A. Reactivity of Heteropolytungstate and Heteropolymolybdate Metal Transition Salts in the Synthesis of Dimethyl Carbonate from Methanol and CO2. Int. J. Mol. Sci. 2010, 11, 2770-2779.

AMA Style

Aouissi A, Al-Deyab SS, Al-Owais A, Al-Amro A. Reactivity of Heteropolytungstate and Heteropolymolybdate Metal Transition Salts in the Synthesis of Dimethyl Carbonate from Methanol and CO2. International Journal of Molecular Sciences. 2010; 11(7):2770-2779.

Chicago/Turabian Style

Aouissi, Ahmed; Al-Deyab, Salem S.; Al-Owais, Ahmad; Al-Amro, Amro. 2010. "Reactivity of Heteropolytungstate and Heteropolymolybdate Metal Transition Salts in the Synthesis of Dimethyl Carbonate from Methanol and CO2." Int. J. Mol. Sci. 11, no. 7: 2770-2779.

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