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OALib Journal期刊
ISSN: 2333-9721
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Ru/ZrO2.хH2O催化剂催化肉桂醛选择性加氢制肉桂醇
DOI: 10.3724/SP.J.1088.2011.10231, PP. 1256-1261
Keywords: 钌,二氧化锆,负载型催化剂,肉桂醛,选择性加氢,肉桂醇
Abstract:
？采用共沉淀法制备了7.5%Ru/ZrO2.хH2O催化剂,运用N2物理吸附-脱附法、X射线衍射、X射线光电子能谱和高分辨透射电子显微镜等技术对催化剂进行了表征,并用于催化肉桂醛选择加氢制肉桂醇反应中,考察了温度、H2压力和溶剂对肉桂醛转化率和肉桂醇选择性的影响.结果表明,肉桂醛转化率随着温度或H2压力的升高而升高,而肉桂醇选择性则随之下降.该催化剂在极性溶剂中比在非极性溶剂中表现出更高的活性和肉桂醇选择性.尤其在极性溶剂三乙胺(Et3N)中反应活性最高,且具有较高的肉桂醇选择性.在Et3N中加入水可进一步提高反应活性和选择性.以V(Et3N)/V(H2O)=4的混合物为溶剂,在4MPa和70°C的优化条件下,反应6h,肉桂醛转化率为97.9%,肉桂醇选择性达85.2%.
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