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Effect of hydrothermal treatment on alumina as support for noble metal catalysts

Authors
Journal
Applied Catalysis
0166-9834
Publisher
Elsevier
Publication Date
Volume
59
Issue
1
Identifiers
DOI: 10.1016/s0166-9834(00)82189-2
Disciplines
  • Earth Science
  • Geography

Abstract

Abstract Boehmite was calcined with and without steam at temperatures in the range 550°-100°. Hydrothermal treatments yielded structures with more well-developed crystallinity and pore sizes distributed around larger average pore sizes than did thermal treatments. Pt and Pt+ Rh were deposited on hydrothermally and thermally treated alumina by direct impregnation and ion exchange. The chemisorption of hydrogen on these metals was about 50% lower on hydrothermally treated than on thermally treated supports. Platinum applied by direct impregnation on hydrothermally treated alumina had lower light-off temperatures and were more efficient catalysts for oxidation of carbon monoxide, propene, xylene and propane than on thermally treated alumina.

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