Affordable Access

Publisher Website

Active sites and intrinsic rates of carbon-gas reactions—a definite confirmation with the carbon-carbon dioxide reaction

Authors
Journal
Carbon
0008-6223
Publisher
Elsevier
Publication Date
Volume
31
Issue
6
Identifiers
DOI: 10.1016/0008-6223(93)90193-e
Keywords
  • Carbon-Carbon Dioxide Reaction
  • Intrinsic Rates
  • Active Sites
  • Carbon-Oxygen Surface Complexes
  • Temperature-Programmed Desorption

Abstract

Abstract The carbon-carbon dioxide reaction was used as a typical example of carbon-gas reactions for a definite confirmation of the active site concept. This concept is based on the determination of intermediate C(O) surface complexes by temperature-programmed desorption (TPD) of samples, which are quenched from reaction temperature. In detail, it is shown that two C(O) surface complexes are formed, but only the labile complex is operative at reaction temperatures up to 1000°C. Reaction rates based on the concentration of the labile C(O) surface complexes are shown to be independent of carbon conversion. As it was already found in earlier studies that these specific rates are also independent of the partial pressure, the active site concept is concluded to be definitely confirmed now.

There are no comments yet on this publication. Be the first to share your thoughts.