Synthesis of dimethyl carbonate by urea alcoholysis over Zn/Al bi-functional catalysts

被引：30
|
作者：
Wu, Xiaomin [1 ,2 ]
Kang, Min [1 ,2 ]
Yin, Yanlong [1 ,2 ]
Wang, Feng [1 ]
Zhao, Ning [1 ]
Xiao, Fukui [1 ]
Wei, Wei [3 ]
Sun, Yuhan [1 ,4 ]
机构：
[1] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Chinese Acad Sci, Shanghai Adv Res Inst, Ctr Greenhouse Gas & Environm Engn, Shanghai 201210, Peoples R China
[4] Chinese Acad Sci, Shanghai Adv Res Inst, CAS Key Lab Low Carbon Convers Sci & Engn, Shanghai 201210, Peoples R China
来源：
APPLIED CATALYSIS A-GENERAL | 2014年 / 473卷
关键词：
Dimethyl carbonate; Urea alcoholysis; Zn/Al mixed oxides; Acidity and basicity; Metal isocyanato group; GAMMA-ZIRCONIUM PHOSPHATE; ZINC-OXIDE; METHYL CARBAMATE; METHANOL; DECOMPOSITION; CHEMISTRY; MECHANISM; PRECURSOR; DIOXIDE; SURFACE;
D O I：
10.1016/j.apcata.2013.12.034
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Zn/Al mixed oxides (ZAO) were prepared via thermal decomposition of hydrotalcite-type precursors derived from urea precipitation. Specially, ZAO catalysts with a Zn/Al molar ratio of 4:1 exhibited high dimethyl carbonate (DMC) yield (similar to 36.5%) when utilized for the DMC synthesis from urea and methanol. The XRD, IR, TPD and computational analysis revealed that the formation of ZnAl2O4 spinel significantly modified the surface acidity and basicity of ZAO catalysts, which were beneficial for the DMC synthesis. We thus opened up a hi-functional mechanism that urea and methanol were respectively activated on the weak acidic and basic sites, advancing the DMC synthesis synergistically. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：13 / 20
页数：8
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