Journal
CHINESE CHEMICAL LETTERS
Volume 22, Issue 3, Pages 362-365Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2010.10.006
Keywords
Ethanol; Cu/SiO2; TEOS; Hydrogenation; Dimethyl oxalate; Ethylene glycol
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Funding
- International Science and Technology Cooperation Program [2009DFA61050]
- National High Technology Research and Development Program of China (863 program) [2007AA05Z334, 2009AA05Z407]
- National Basic Research Program of China [2007CB210200]
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The Cu/SiO2 catalysts were in situ synthesized by the hydrolysis of tetraethyl orthosilicate (TEOS) in one phase solution using ethanol as co-solvent or TEOS/H2O two phases solution, followed by the precipitation of copper on SiO2 by ammonia evaporation. In the hydrogenation of dimethyl oxalate, the catalyst prepared by one phase hydrolysis exhibited higher activity and ethylene glycol (EG) selectivity at lower temperature than that of two phases due to its larger BET surface area and multimodal pore distribution. At 488-503 K, the catalyst prepared in one phase solution with water/ethanol (W/E) volume ratio of 3:1 exhibited 90 95% EG selectivity, while catalyst prepared by two phase hydrolysis reached 90% EG selectivity only at 498-503 K. (C) 2010 Shu Rong Wang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
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