2017年7月
Ag addition to CuO-ZrO2 catalysts promotes methanol synthesis via CO2 hydrogenation
JOURNAL OF CATALYSIS
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- 巻
- 351
- 号
- 開始ページ
- 107
- 終了ページ
- 118
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.jcat.2017.04.021
- 出版者・発行元
- ACADEMIC PRESS INC ELSEVIER SCIENCE
The effect of adding Ag to CuO-ZrO2 catalysts for the hydrogenation of CO2 to methanol was investigated using CuO-ZrO2, Ag/CuO-ZrO2, and Ag/ZrO2. The addition of Ag to CuO-ZrO2 catalysts decreased the specific surface area and also broke its mesostructure. Thus, Ag played a significant role as a sintering aid in the preparation of Ag/CuO-ZrO2 catalysts. We note that the as-prepared Ag/CuO-ZrO2 catalysts contained Ag+ and Zrq+ (q < 4) sites and that the Zrq+ content increased with increasing Ag+ content. Furthermore, the presence of CuO in the Ag/CuO-ZrO2 catalyst appeared to stabilize Ag+ and Zrq+ species under air. Based on H-2 chemisorption and powder X-ray diffraction patterns, formation of a Ag-Cu alloy was observed on completely reduced and spent Ag/CuO-ZrO2 catalysts. Completely reduced Ag/CuO-ZrO2 catalysts exhibited a higher methanol production rate (7.5 mL h(-1) g(cat)(1)) compared to completely reduced CuO-ZrO2 (6.9 mL h(-1) g(cat)(1)) and Ag/ZrO2 catalysts (2.2 mL h(-1) g(cat)(1)) under the following reaction conditions: CO2/H-2/N-2 = 1/3/1, catalyst loading = 500 mg, W/F-total = 1000 mg(cat) s mL(-1), reaction temperature = 230 degrees C, pressure = 10 bar. (C) 2017 Elsevier Inc. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/j.jcat.2017.04.021
- ISSN : 0021-9517
- eISSN : 1090-2694
- Web of Science ID : WOS:000403440500011