COMPARISON OF PLATINUM IRIDIUM BIMETALLIC CATALYSTS SUPPORTED ON GAMMA-ALUMINA AND HY-ZEOLITE IN N-HEXANE REFORMING REACTION

Cited 10 time in webofscience Cited 0 time in scopus
  • Hit : 228
  • Download : 0
The characteristics and activity, selectivity and stability of Pt-Ir bimetallic catalysts supported on gamma-Al2O3 and HY-zeolite were examined using hydrogen chemisorption on catalysts calcined at different temperatures as well as by catalyst performance for n-hexane reforming at 573-773 K and atmospheric pressure. All the catalysts used in this study were prepared by impregnation. The Pt-Ir/HY and Pt-Ir/Al2O3 calcined at 773 k did not exhibit severe oxidative agglomeration, in contrast to monometallic iridium catalysts, and their activity and selectivity in n-hexane reforming were quite different from those of monometallic platinum or iridium catalysts. The catalysts supported on HY-zeolite showed high activity for isomerization while gamma-Al2O3-supported catalysts had high activity for dehydrocyclization. Deactivation with reaction time was much more pronounced on HY-zeolite-supported catalysts. Pt-Ir catalysts supported on Al2O3 and HY showed high selectivity and activity to high-octane value hydrocarbons when the both metals were present in equal amount, 0.5 wt.-%. Especially the HY-zeolite-supported Pt-Ir bimetallic catalyst showed a good performance for producing high-octane hydrocarbons containing less amounts of aromatic compounds. It may be concluded that the nature of the support greatly affected the catalytic properties of Pt-Ir bimetallic catalysts for n-hexane reforming.
Publisher
ELSEVIER SCIENCE BV
Issue Date
1994-08
Language
English
Article Type
Article
Citation

APPLIED CATALYSIS A-GENERAL, v.115, no.2, pp.229 - 241

ISSN
0926-860X
DOI
10.1016/0926-860X(94)80355-2
URI
http://hdl.handle.net/10203/66328
Appears in Collection
CBE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 10 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0