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

被引：27
作者：
Aouissi, Ahmed [1 ]
Al-Deyab, Salem S. [1 ]
Al-Owais, Ahmad
Al-Amro, Amro
机构：
[1] King Saud Univ, Petrochem Res Chair, Dept Chem, Riyadh 11451, Saudi Arabia
来源：
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES | 2010年 / 11卷 / 07期
关键词：
heteropoly compounds; dimethyl carbonate; Keggin structure; carbon dioxide; 12-MOLYBDOPHOSPHORIC ACID; CATALYTIC REACTIVITY; THERMAL-STABILITY; DIOXIDE; ACTIVATION; OXIDATION; DMC; BEHAVIOR; COPPER;
D O I：
10.3390/ijms11072770
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
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.
引用
收藏
页码：2770 / 2779
页数：10
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