Gasification catalysts pretreated at > 973 K exhibit reactivity variations attributable solely to geometric effects, which are indicative of the reaction's sympathetic structure-sensitivity. In contrast, catalysts pretreated at < 973 K exhibit an apparent antipathetic structure sensitivity which is in fact attributable to indirect, chemical-type metal-support interactions, MSI. Various metals were found to manifest either (I) a decrease, (II) no variation, or (III) an increase in the reaction's apparent activation energy, Eact, with increasing initial oxygen content in the carbon support, %O. By analogy with geometric structure-sensitivity definitions , cases I, II and III should be viewed as examples of antipathetic, passive, and sympathetic chemical sensitivity to %O.
|Original language||English (US)|
|Number of pages||2|
|Journal||Extended Abstracts and Program - Biennial Conference on Carbon|
|State||Published - Jan 1 1991|
|Event||20th Biennial Conference on Carbon - Santa Barbara, CA, USA|
Duration: Jun 23 1991 → Jun 28 1991
All Science Journal Classification (ASJC) codes