Selective hydrogenation of benzaldehyde to benzyl alcohol over Au/Al2O3
Selective hydrogenation of benzaldehyde to benzyl alcohol over Au/Al2O3
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DOI：
10.1016/j.catcom.2011.09.017
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发表时间：
2011-11
影响因子：
3.7
通讯作者：
N. Perret;F. Cárdenas-Lizana;M. Keane
中科院分区：
文献类型：
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作者：
N. Perret;F. Cárdenas-Lizana;M. Keane
我们首次证明了在Au/Al 2 O 3催化剂上苯甲醛连续气相加氢（T= 393 K; P= 1 atm）中苯甲醇的唯一生产，其中活性在很大程度上保持了长达15 h的运行。XRD和DRS UV-vis已经确定了程序升温还原至473 K后金属Au的存在，其表面积加权平均Au粒度（来自TEM分析）为7.9 nm。在相同的反应条件下，Ni/Al 2 O3和Pd/Al 2 O3催化剂对苯甲醛的氢解反应均为非选择性反应，主要产物为甲苯，催化剂活性随时间的延长而降低。结果表明，Au/Al 2 O 3催化剂是一种很有前途的苯甲醇合成催化剂。
We provide the first evidence of exclusive benzyl alcohol production in the continuous gas phase hydrogenation of benzaldehyde (T=393K; P=1atm) over Au/Al2O3, where activity was largely maintained for up to 15h on-stream. XRD and DRS UV–vis have established the presence of metallic Au post temperature programmed reduction to 473K, with a surface area weighted mean Au particle size (from TEM analysis) of 7.9nm. Under the same reaction conditions, Ni/Al2O3and Pd/Al2O3were non-selective, generating toluene as the principal product via hydrogenolysis of benzaldehyde and exhibiting an appreciable temporal loss of activity. The results establish Au/Al2O3as a promising catalyst for the production of benzyl alcohol.