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Title: Acid-catalyzed hydrogenation during kerosene hydrodewaxing over H/ZSM-5

Abstract

Hydrogen addition to the products derived from cracking kerosene over H/ZSM-5 was observed at hydrogen pressures between 4.1-8.7 MPa and at 373-390{degrees}C. At low pressures, kerosene cracking over H/ZSM-5 yielded typical cracked products: aromatics, as well as low molecular weight saturates and olefins. Endothermic reactor temperature profiles were also observed, indicative of cracking reactions. At high hydrogen partial pressures product selectivity was altered in that kerosene cracking gave high yields of low molecular weight paraffins and low yields of olefins and aromatics. Reactor temperature profiles were exothermic, indicative of hydrocracking reactions. A mechanism for acid catalyzed hydrogenation is suggested. Although hydrogenation was not observed at lower hydrogen pressures, hydrogen proved beneficial in maintaining catalyst activity at a stable level. Lost catalyst activity was restored by maintaining the catalyst under static hydrogen at 1.4 MPa and 370{degrees}C for 16h. 36 refs., 14 figs., 3 tabs.

Authors:
;  [1]
  1. Univ. of Utah, Salt Lake City, UT (United States)
Publication Date:
OSTI Identifier:
486376
Resource Type:
Journal Article
Journal Name:
Journal of Catalysis
Additional Journal Information:
Journal Volume: 164; Journal Issue: 1; Other Information: PBD: Nov 1996
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 40 CHEMISTRY; KEROSENE; HYDROGENATION; ZEOLITES; CATALYTIC EFFECTS; ALKENES; CATALYSTS; DEWAXING; HETEROGENEOUS CATALYSIS; CATALYTIC CRACKING

Citation Formats

Longstaff, D.C., and Hanson, F.V. Acid-catalyzed hydrogenation during kerosene hydrodewaxing over H/ZSM-5. United States: N. p., 1996. Web. doi:10.1006/jcat.1996.0362.
Longstaff, D.C., & Hanson, F.V. Acid-catalyzed hydrogenation during kerosene hydrodewaxing over H/ZSM-5. United States. doi:10.1006/jcat.1996.0362.
Longstaff, D.C., and Hanson, F.V. Fri . "Acid-catalyzed hydrogenation during kerosene hydrodewaxing over H/ZSM-5". United States. doi:10.1006/jcat.1996.0362.
@article{osti_486376,
title = {Acid-catalyzed hydrogenation during kerosene hydrodewaxing over H/ZSM-5},
author = {Longstaff, D.C. and Hanson, F.V.},
abstractNote = {Hydrogen addition to the products derived from cracking kerosene over H/ZSM-5 was observed at hydrogen pressures between 4.1-8.7 MPa and at 373-390{degrees}C. At low pressures, kerosene cracking over H/ZSM-5 yielded typical cracked products: aromatics, as well as low molecular weight saturates and olefins. Endothermic reactor temperature profiles were also observed, indicative of cracking reactions. At high hydrogen partial pressures product selectivity was altered in that kerosene cracking gave high yields of low molecular weight paraffins and low yields of olefins and aromatics. Reactor temperature profiles were exothermic, indicative of hydrocracking reactions. A mechanism for acid catalyzed hydrogenation is suggested. Although hydrogenation was not observed at lower hydrogen pressures, hydrogen proved beneficial in maintaining catalyst activity at a stable level. Lost catalyst activity was restored by maintaining the catalyst under static hydrogen at 1.4 MPa and 370{degrees}C for 16h. 36 refs., 14 figs., 3 tabs.},
doi = {10.1006/jcat.1996.0362},
journal = {Journal of Catalysis},
number = 1,
volume = 164,
place = {United States},
year = {1996},
month = {11}
}