Accession Number:

ADA149477

Title:

An Infrared Study of the Hydrogenation of Carbon Dioxide on Supported Rhodium Catalysts.

Descriptive Note:

Technical rept.,

Corporate Author:

AUBURN UNIV AL DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1985-01-07

Pagination or Media Count:

37.0

Abstract:

An infrared study of the methanation of CO2 on supported Rh catalysts has been performed. This reaction has been shown to occur over these catalysts with higher turnover frequency at a given temperature and Rh loading than does the methanation of CO. A support effect has been demonstrated for the reaction over the supported Rh catalysts TiO2 Al2O3 SiO2 in reactivity. A key surface intermediate during the methanation reaction is a carbonyl hydride species, as evidenced by a prominent infrared band in the 2020-2040cm region which shifts by 5-10cm when D2 is substituted for H2 in the reaction mixture. This carbonyl hydride species can be produced in the absence of H2 by migration of H from the support to Rh. The dissociation of CO2 on supported Rh has been shown to be enhanced by the presence of H2 and impurity boron. Originator-supplied keywords include Infrared spectroscopy, Carbon dioxide, Hydrogenation, Methanation, and Supported rhodium catalysts.

Subject Categories:

  • Organic Chemistry
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE