期刊
CATALYSIS SCIENCE & TECHNOLOGY
卷 5, 期 6, 页码 3333-3339出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5cy00251f
关键词
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资金
- 973 Program [2011CBA00505, 2013CB933200]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA09030102]
- NSF of China [21403237, 21303202, 21303203]
- NSF of Fujian Province [2014J05025]
(Pd-CuCl2)/gamma-Al2O3 catalyst with excellent activity and selectivity has been successfully developed for vapor-phase carbonylation of methyl nitrite to dimethyl carbonate (DMC). It has been demonstrated that Cl-is necessary for the superior selectivity (99.8%) to DMC, and that Cl- and Cu2+ have a synergetic effect. The Lewis acid sites of the gamma-Al2O3 support may be suitable for vapor-phase carbonylation of methyl nitrite to DMC. Moreover, the catalytic mechanism of DMC formation on the (Pd-CuCl2)/gamma-Al2O3 catalyst has been reasonably proposed based on the results of XPS and in situ diffuse reflectance infrared spectroscopy. The intermediate Cl-Pd(II)-COOCH3 is the key factor for the synthesis of DMC.
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