Support effects in catalyzed carbon gasification

C. A. Leon y Leon, Ljubisa R. Radovic

Research output: Contribution to journalArticle

Abstract

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 [2], cases I, II and III should be viewed as examples of antipathetic, passive, and sympathetic chemical sensitivity to %O.

Original languageEnglish (US)
Pages (from-to)498-499
Number of pages2
JournalExtended Abstracts and Program - Biennial Conference on Carbon
StatePublished - 1991

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Gasification
Catalyst supports
Catalysts
Carbon
Metals
Activation energy
Oxygen

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

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abstract = "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 [2], cases I, II and III should be viewed as examples of antipathetic, passive, and sympathetic chemical sensitivity to {\%}O.",
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Support effects in catalyzed carbon gasification. / Leon y Leon, C. A.; Radovic, Ljubisa R.

In: Extended Abstracts and Program - Biennial Conference on Carbon, 1991, p. 498-499.

Research output: Contribution to journalArticle

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AU - Radovic, Ljubisa R.

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