The effect of spiltover hydrogen on the stabilization of catalytic activities of Y-type zeolite and pillared monmorillonite for the disproportionation of 1,2,4-trimethylbenzene
- Waseda Univ., Tokyo (Japan)
Disproportionation of 1,2,4-trimethylbenzene was carried out at 200{degrees}C to investigate the effect of hydrogen spillover on the stabilization of the catalytic activities of ultrastable Y (USY) zeolite and pillared montmorillonite. The catalytic activity of pillared monmorillonite, the acidity of which is mainly due to Lewis acid sites, became stable against deactivation in the presence of spiltover hydrogen. There was a less pronounced effect of spiltover hydrogen on the deactivation of USY catalyst treated at 400{degrees}C. When the surface acidity of USY was converted from Broensted to Lewis acidity by treatment of temperatures as high as 750{degrees}C, however, the deactivation was effectively suppressed by spiltover hydrogen. The authors concluded from these results that the stabilization of activity by spiltover hydrogen is linked to Lewis acidity, irrespective of the type of catalyst. 23 refs., 9 figs., 1 tab.
- OSTI ID:
- 98962
- Journal Information:
- Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 1 Vol. 154; ISSN 0021-9517; ISSN JCTLA5
- Country of Publication:
- United States
- Language:
- English
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