Reactivation of coked H-ZSM-5 by treatment with hydrogen and alkanes
- Univ. of Leipzig (Germany)
- Univ. of Hamburg (Germany)
- Leuna-Werke GmbH (Germany)
The conversion of methanol to hydrocarbons on zeolite H-ZSM-5, in particular the long-term stability of the catalyst, was studied under different reaction conditions. Whereas no significant change in the product distribution was observed, hydrogen and alkane-containing recycle gases show lower deactivation rates than nitrogen. In addition, spent catalysts were partially reactivated by alkane treatment, increasing the time on stream before an oxidative regeneration procedure is required. Lower alkanes such as propane and isobutane yield the best results. The influence of hydrogen-containing gases on the deactivation rate and on the nature of coke on zeolite H-ZSM-5 indicates dissociative adsorption of hydrogen and alkanes on a few sites with enhanced activity. Surface hydrogen species formed by adsorption of alkanes are assumed to make possible the hydrocracking of carbonaceous deposits. 20 refs., 6 figs., 2 tabs.
- OSTI ID:
- 486383
- Journal Information:
- Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 1 Vol. 164; ISSN 0021-9517; ISSN JCTLA5
- Country of Publication:
- United States
- Language:
- English
Similar Records
XPS study of coke distribution on ZSM-5
Deactivation and regeneration of ZSM-5 zeolite in catalytic pyrolysis of plastic wastes
Effects of coke formation on the acidity of ZSM-5
Journal Article
·
Thu Dec 31 23:00:00 EST 1987
· J. Catal.; (United States)
·
OSTI ID:5309066
Deactivation and regeneration of ZSM-5 zeolite in catalytic pyrolysis of plastic wastes
Journal Article
·
Mon Aug 15 00:00:00 EDT 2011
· Waste Management
·
OSTI ID:21578460
Effects of coke formation on the acidity of ZSM-5
Journal Article
·
Sun Jun 01 00:00:00 EDT 1986
· J. Catal.; (United States)
·
OSTI ID:5330156