Dynamic experimental methods using in-situ measurements of the surface intermediates applied to the fine chemistry

Nonsteady-state kinetics was used for the detn. of the reaction mechanism of a heterogeneous catalytic reaction, and the characteristic shape of the time evolution curves of the concns. at the outlet of the reactor was assocd. with rate-limiting steps. Addnl. in-situ measurements of surface intermediates were correlated with those response curves to get a phys. meaning to the detd. kinetic parameters. An exptl. setup was developed to investigate simultaneously the surface and gas-phase concns. That the knowledge of the reaction mechanism and the identification of the active sites on the catalyst are of great use for reaction engineering was exemplified with the methylation of catechol where the catalyst was selectively modified to increase the yield of 3-methylcatechol from 25 to nearly 70%. [on SciFinder (R)]


Published in:
Chimia, 50, 3, 61-4
Year:
1996
Keywords:
Note:
CAN 124:346514
45-4
Industrial Organic Chemicals, Leather, Fats, and Waxes
Swiss Federal Institute of Technology,Lausanne,Switz.
Journal
0009-4293
written in English.
120-80-9 (Catechol) Role: RCT (Reactant), RACT (Reactant or reagent) (optimization of catechol methylation by detn. of reaction mechanism and identification of active sites on catalyst); 90-05-1P (Guaiacol); 452-86-8P (4-Methylcatechol); 488-17-5P (3-Methylcatechol) Role: SPN (Synthetic preparation), PREP (Preparation) (optimization of catechol methylation by detn. of reaction mechanism and identification of active sites on catalyst); 1344-28-1 (g-Alumina) Role: CAT (Catalyst use), USES (Uses) (g-phase, magnesium-doped; optimization of catechol methylation by detn. of reaction mechanism and identification of active sites on catalyst)
Laboratories:




 Record created 2006-04-18, last modified 2018-03-17


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