Liquid phase benzene hydrogenation to cyclohexane over modified Ni-P amorphous catalysts
Liquid phase benzene hydrogenation to cyclohexane over modified Ni-P amorphous catalysts
复制标题
改性 Ni-P 非晶催化剂液相苯加氢制环己烷
DOI：
10.1016/s0167-577x(01)00273-7
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发表时间：
2001-10-01
影响因子：
3
通讯作者：
Xu, YP
中科院分区：
文献类型：
--
作者：
Li, HX;Xu, YP
采用急冷法、碱浸法和NaH_2PO_2还原法制备了超细Ni-P、Ni-P/SiO_2、Ni-W-P/SiO_2和Raney Ni-P四种非晶态Ni-P催化剂。在苯的液相加氢反应中，由于其独特的非晶态结构，所有催化剂都表现出比Raney Ni催化剂更高的TOF值。除超细Ni-P催化剂具有极低的比表面积外，其余Ni-P催化剂的活性均高于Raney Ni。Ni-P非晶态催化剂在高温下的晶化使其活性显著下降。根据各种表征结果，初步探讨了Ni-P催化剂的结构与催化活性的关系。(C)出版社：Elsevier Science B. V.
Four kinds of Ni-P amorphous catalysts, ultrafine Ni-P, Ni-P/SiO2,Ni-W-P/SiO2 and Raney Ni-P, were prepared by either the rapid quenching technique, following the alkali leaching, or the chemical reduction with NaH2PO2. During the liquid phase hydrogenation of benzene, all these catalysts exhibited higher TOF values than Raney Ni catalyst, owing to their unique amorphous structure. Except for the ultrafine Ni-P, which had extremely low surface active area, all the other Ni-P catalysts also exhibited higher activity per gram Ni than Raney Ni. The crystallization of the Ni-P amorphous catalysts at high temperature caused a considerable decrease in their activities. According to various characterizations, the relationship between catalytic activity and the structure of the as-prepared Ni-P catalysts was briefly discussed. (C) 2001 Published by Elsevier Science B.V.