Multiple steady states in reaction controlled surface catalysed reactions

✍ Scribed by C.G. Takoudis; L.D. Schmidt

• Publisher: Elsevier Science
• Year: 1981
• Tongue: English
• Weight: 702 KB
• Volume: 36
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(81)85018-x

✦ Synopsis

A&da&-Even

when gas composition and pressure above an isothermal catalyst surface are constant and rate parameters are independent of coverage, the reaction rate may not be unique. Necessary and sufficient conditions for reaction rate multiplicity are obtained here for uni-and bimolecular reactions when more than one vacant site is required for reaction. The work of Eigenberger is extended and generalized for this situation. Bimolecular reaction with competitive or noncompetitive chemisorption of at least two species may lead to multiple reaction rates.

The presence of a precursor (noncompetitively adsorbed intermediate state) may also lead to multiple steady states,even when less than two vacant sites are required for reaction. Conditions for steady state multiplicity are also considered for the Eley-Rideal reaction mechanism.