عنوان

ABE Condensation over Monometallic Catalysts:

Number

LA4w15c1wh

Title Proper

ABE Condensation over Monometallic Catalysts:

General Material Designation

[Article]

First Statement of Responsibility

Goulas, KA; Gunbas, G; Dietrich, PJ; Sreekumar, S; Grippo, A; Chen, JP; Gokhale, AA; Toste, FD

Title Proper by Another Author

Catalyst Characterization and Kinetics

Text of Note

© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Herein, we present work on the catalyst development and the kinetics of acetone-butanol-ethanol (ABE) condensation. After examining multiple combinations of metal and basic catalysts reported in the literature, Cu supported on calcined hydrotalcites (HT) was found to be the optimal catalyst for the ABE condensation. This catalyst gave a six-fold increase in reaction rates over previously reported catalysts. Kinetic analysis of the reaction over CuHT and HT revealed that the rate-determining step is the C−H bond activation of alkoxides that are formed from alcohols on the Cu surface. This step is followed by the addition of the resulting aldehydes to an acetone enolate formed by deprotonation of the acetone over basic sites on the HT surface. The presence of alcohols reduces aldol condensation rates, as a result of the coverage of catalytic sites by alkoxides.

Date of Publication

2017

Title

UC Berkeley

Electronic name

[Article]

275578

a

Y