The stop-effect, a drastic increase of the reaction rate when the feed concn. of a reactant is switched to zero, was studied for the dehydration of ethanol to ethylene on y- alumina at 180 and 200 DegC. Two basic models exist in the literature to describe this phenomenon. They were discriminated on the basis of transient and periodic expts., coupled with FTIR data of the adsorbed species. The model that best describes these measurements postulates the adsorption of ethanol on two different sites, S1 and S2, with a free S2 site being necessary for ethylene formation. [on SciFinder (R)]
Title
Model discrimination for reactions with stop-effect
Published in
Dynamics of Surfaces and Reaction Kinetics in Heterogeneous Catalysis
Series
Studies in Surface Science and Catalysis, 109
Pages
295-304
Date
1997
Publisher
Amsterdam, Elsevier
Note
CAN 128:180044 22-4 Physical Organic Chemistry Institute of Chemical Engineering,Swiss Federal Institute of Technology,Lausanne,Switz. Journal 0167-2991 written in English. 64-17-5 (Ethanol) Role: PEP (Physical, engineering or chemical process), PRP (Properties), RCT (Reactant), PROC (Process), RACT (Reactant or reagent) (model discrimination for reactions with stop-effect); 74-85-1P (Ethene) Role: SPN (Synthetic preparation), PREP (Preparation) (model discrimination for reactions with stop-effect); 1344-28-1 (Alumina) Role: CAT (Catalyst use), PEP (Physical, engineering or chemical process), PRP (Properties), PROC (Process), USES (Uses) (g-; model discrimination for reactions with stop-effect)
Record creation date
2006-04-18
