VAPOR-PHASE HYDRODEHALOGENATION OF CHLOROBENZENE OVER PLATINUM/H-BEA ZEOLITE

被引:89
作者
CREYGHTON, EJ [1 ]
BURGERS, MHW [1 ]
JANSEN, JC [1 ]
VANBEKKUM, H [1 ]
机构
[1] DELFT UNIV TECHNOL,DEPT ORGAN CHEM & CATALYSIS,2628 BL DELFT,NETHERLANDS
关键词
BRONSTED ACIDITY; CHLOROBENZENE; COKING; HYDRODECHLORINATION; PLATINUM H-BEA ZEOLITE;
D O I
10.1016/0926-860X(95)00080-1
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
Platinum/H-BEA zeolite and Pt/A1(2)O(3) were studied as catalysts in the vapour-phase hydrodehalogenation of chlorobenzene. Both catalysts show high activity in the hydrogenolysis of the carbon-halogen bond. Deactivation of platinum-H-BEA is ascribed to acid catalyzed oligomerization reactions and coke formation. This is supported by quantitative DSC analyses and by extraction/GC-MS experiments. Replacement of Bronsted acid sites in platinum/H-BEA by sodium ions results in a diminished coke formation and an improved stability.
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页码:275 / 288
页数:14
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