THE EFFECTS OF ALKALI-METAL HYDROXIDE PRETREATMENT ON THE HYDROGENATION ACTIVITY OF NICKEL-LOADED Y-ZEOLITES

被引:9
作者
COUGHLAN, B
KEANE, MA
机构
[1] UNIV GLASGOW,DEPT CHEM,GLASGOW G12 8QQ,SCOTLAND
[2] NATL UNIV IRELAND UNIV COLL GALWAY,PHYS CHEM LABS,GALWAY,IRELAND
来源
JOURNAL OF MOLECULAR CATALYSIS | 1990年 / 63卷 / 02期
关键词
D O I
10.1016/0304-5102(90)85143-6
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
A range of NiKY and NiNaY zeolites prepared by ion exchange were treated with NaOH and KOH solutions of varying pH at room temperature and reduced in a hydrogen atmosphere at 723 K. By a combination of iodometric titrations and X-ray line broadening it is shown that reduction of the hydroxide treated samples generates a greater mass of nickel metal, which is in the form of smaller crystallites compared with the untreated zeolites. The pretreated samples exhibit a uniquely high steady state catalytic activity in the hydrogenation of benzene to cyclohexane.
引用
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页码:193 / 199
页数:7
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