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

被引：40
|
作者：
Aouissi, Ahmed [1 ]
Al-Othman, Zeid Abdullah [1 ]
Al-Amro, Amro [1 ]
机构：
[1] King Saud Univ, Dept Chem, Riyadh 11451, Saudi Arabia
来源：
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES | 2010年 / 11卷 / 04期
关键词：
heteropolyanion; Keggin structure; methanol; dimethyl carbonate; direct synthesis; carbon dioxide; THERMAL-STABILITY; CATALYST; ACIDS;
D O I：
10.3390/ijms11041343
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：
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 degrees 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).
引用
收藏
页码：1343 / 1351
页数：9
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