Effect of Promoters on the Catalytic Activity of MCM-41 with High Copper Content in Benzene Hydroxylation
Effect of Promoters on the Catalytic Activity of MCM-41 with High Copper Content in Benzene Hydroxylation
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DOI：
10.1016/s1872-2067(08)60035-2
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发表时间：
2008-04
影响因子：
16.5
通讯作者：
Y. Kong;Xin Xu;Yong Wu;Rui Zhang;Jun Wang
中科院分区：
文献类型：
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作者：
Y. Kong;Xin Xu;Yong Wu;Rui Zhang;Jun Wang
铜含量高达26.0%的Cu-MCM-41催化剂对苯与过氧化氢的直接羟基化反应具有良好的催化活性。考察了各种杂原子对催化剂活性的影响。引入少量的B、Al等酸性助剂，可使苯酚选择性提高到100%。钒、铬等氧化还原助剂对苯的转化率略有提高，而钛、锆等元素对催化剂的催化活性有一定的抑制作用。根据自由基机理，对这些影响的原因进行了简要的讨论。
Cu-MCM-41 with a high copper content up to 26.0% showed excellent catalytic activity in the direct hydroxylation of benzene with hydroperoxide. The effects of various kinds of heteroatoms on the catalytic activity were studied. The introduction of a small amount of acidic promoters such as B and Al can enhance phenol selectivity to 100%. Some redox promoters such as V and Cr increase the conversion of benzene slightly, whereas other elements such as Ti and Zr inhibit the catalytic activity of catalysts. The reasons for these influences were briefly discussed according to the radical mechanism.