The activity of NiMo catalysts supported on X, Y, mordenite., and ZSM-5 zeolites in the hydrocracking of n-heptane

被引：0
|
作者：
Fabis, Grazyna [1 ]
Sarbak, Zenon [1 ]
机构：
[1] Ctr Mat Polimerowych & Weglowych PAN, PL-41819 Zabrze, Poland
来源：
PRZEMYSL CHEMICZNY | 2007年 / 86卷 / 02期
关键词：
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Acid strength and catalytic activity were detd. in com. NaX (1.2), NaY (2.4), mordenite (5.4), or ZSM-5 (Si/Al = 110) zeolite supported Ni-Mo catalysts (4.06-4.57% NiO, 6.37-8.71% MoO3) prepd. by incipient wetness impregnation with aq. Ni(NO3)(2) and (NH4)(6)Mo7O24 solns.at 90 and 110 degrees C and 18-hr. calcination in air at 450 degrees C. The total (Bronsted and Lewis) acidity assessed via n-butylamine chemisorptions run at 150 and 250 degrees C was max. (3.4 mmol/g) and min. (0.8 mmols/g catalyst) in the Y- and the mordenite-supported catalysts. In hydrocracking (300 degrees C, I atm) of n-heptane, the activities (% propene formed in 4 hrs.) followed the order: ZSM-5 (97.8) > Y (96.4) > mordenite (95.8) > X (93.30%). The Ni-Mo/ZSM-5 had mostly (91%) strong acidic centers. The absence of multibranched products suggests n-heptane isomerization and hydrocracking to have run inside the channels of the zeolites.
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页码：122 / 125
页数：4
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