Low-temperature synthesis of DME from CO2/H2 over Pd-modified CuO-ZnO-Al2O3,-ZrO2/HZSM-5 catalysts

被引：73
|
作者：
Sun, KP [1 ]
Lu, WW [1 ]
Wang, M [1 ]
Xu, XL [1 ]
机构：
[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China
来源：
CATALYSIS COMMUNICATIONS | 2004年 / 5卷 / 07期
关键词：
CO2; hydrogenation; low-temperature synthesis; methanol; dimethyl ether; Pd-modified;
D O I：
10.1016/j.catcom.2004.03.012
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：
Three series of Pd-modified CuO-ZnO-Al2O3-ZrO2/HZSM-5 catalysts were prepared and characterized by BET, XRD and TPR analysis. The catalytic system was evaluated in the development of direct synthesis of dimethyl ether (DME) from carbon dioxide hydrogenation at low temperature (T = 200 degreesC, P = 3.0 MPa). The results indicated that the addition of palladium markedly enhanced the DME synthesis and retarded the CO formation. An explanation of this promoting effect of Pd on the DME synthesis could be attributed to the spillover of hydrogen from Pd-0 to the neighboring phase. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：367 / 370
页数：4
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