Surface properties and hydrocracking activity of NiMo zeolite catalysts

被引：23
作者：
Egia, B
Cambra, JF
Arias, PL
Guemez, MB
Legarreta, JA
Pawelec, B
Fierro, JLG
机构：
[1] Escuela Ingenieros, Dept Ingn Quim & Medio Ambiente, Bilbao 48013, Spain
[2] CSIC, Inst Catalisis & Petr Quim, Madrid 28049, Spain
来源：
APPLIED CATALYSIS A-GENERAL | 1998年 / 169卷 / 01期
关键词：
hydrocracking; zeolites; nickel; molybdenum;
D O I：
10.1016/S0926-860X(97)00320-7
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The hydrocracking properties of Ni, Mo and NiMo sulphides supported on an ultrastable HY zeolite were examined by studying the hydroconversion of n-decane at moderate pressure (3 MPa). All catalysts were found to deactivate during the first hours on-stream, then reaching almost constant conversion values. Their cracking conversions are significantly higher than that of the HY support. A strong imbalance between the hydrogenation and the acidic function of catalysts was observed. The product selectivities did not depend on the conversion and the secondary cracking occurred. In the binary NiMo samples no synergetic effect between the individual Ni and Mo phases was observed. A reasonable correlation between the n-decane steady-state conversions at 598 K, the sulphidation degree of the metals and Bronsted acidities of catalysts were found. (C) 1998 Elsevier Science B.V.
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收藏
页码：37 / 53
页数：17
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