Classical Kinetics of Catalytic Reactions

ChemInform ◽  
2003 ◽  
Vol 34 (34) ◽  
Author(s):  
Gerald Djega-Mariadassou ◽  
Michel Boudart
Keyword(s):  
Catalytic Reactions ◽  
Kinetics Of ◽  
Kinetics Of Catalytic Reactions

KINETICS OF CATALYTIC REACTIONS ON A UNIFORM SURFACE AND SINGLE SITES: SIMILARITY AND DIFFERENCE

2009 ◽  
Vol 16 (05) ◽  
pp. 757-760 ◽  
Author(s):  
VLADIMIR P. ZHDANOV
Keyword(s):  
Reaction Scheme ◽  
Catalytic Reactions ◽  
First Order ◽  
Metal Atoms ◽  
Catalytic Sites ◽  
Reaction Orders ◽  
Similarities And Differences ◽  
Similarity And Difference ◽  
Kinetics Of ◽  
Kinetics Of Catalytic Reactions

To illustrate typical similarities and differences in the reaction kinetics occurring on a uniform surface and single sites (e.g. on single metal atoms incorporated into the inner walls of zeolite), we analyze a generic reaction scheme of N2O decomposition running in the presence of oxygen. In both cases, there are three reaction regimes, (i) controlled exclusively by the N2O -decomposition step, (ii) partly inhibited by oxygen, or (iii) limited by oxygen desorption. Regime (i) is kinetically similar (first order in N2O ) in the two cases. The states of the catalytic sites are however different. Regime (ii) exhibits different reaction orders in oxygen (-0.5 for the surface and -1 for single sites). Regime (iii) is fully identical in both the cases.

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