Direct Catalytic Conversion of Ethanol to C5+ Ketones: Role of Pd-Zn Alloy on Catalytic Activity and Stability

Subramaniam, Senthil; Guo, Mond F.; Bathena, Tanmayi; Gray, Michel J.; Zhang, Xiao; Martinez, Abraham I.; Kovarik, Libor; Goulas, Konstantinos; Kallupalayam Ramasamy, Karthikeyan

doi:10.1002/anie.202005256

Direct Catalytic Conversion of Ethanol to C5+ Ketones: Role of Pd-Zn Alloy on Catalytic Activity and Stability

Journal Article · Mon Aug 17 00:00:00 EDT 2020 · Angewandte Chemie International Edition

DOI:https://doi.org/10.1002/anie.202005256· OSTI ID:1647347

Subramaniam, Senthil ^[1]; Guo, Mond F. ^[1]; Bathena, Tanmayi ^[2]; Gray, Michel J. ^[1]; Zhang, Xiao ^[3]; Martinez, Abraham I. ^[1]; Kovarik, Libor ^[1]; Goulas, Konstantinos ^[2]; Kallupalayam Ramasamy, Karthikeyan ^[1]

BATTELLE (PACIFIC NW LAB)
Oregon State University
Washington State University

Ethanol can be used as a platform molecule for synthesizing valuable chemicals and fuel precursors. Direct synthesis of C5+ ketones, building block for lubricants and hydrocarbon fuels, from ethanol was achieved over a stable Pd-promoted ZnO-ZrO2 catalyst. The sequence of reaction steps involved in the C5+ ketone formation from ethanol and the key reaction step was found to be the in situ generation of the acetone intermediate and the cross aldol condensation between the reaction intermediates acetaldehyde and acetone. The formation of Pd-Zn alloy in situ at the reaction condition was identified to be the key factor in maintaining high yield to the C5+ ketones and the stability to the catalyst. The yield of >70% to C5+ ketones was achieved over a 0.1%Pd-ZnO-ZrO2 mixed oxide catalyst, and the catalyst was demonstrated to be stable beyond 2500 hours on stream without any catalyst deactivation.

Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-76RL01830

OSTI ID:: 1647347

Report Number(s):: PNNL-SA-148910

Journal Information:: Angewandte Chemie International Edition, Journal Name: Angewandte Chemie International Edition Journal Issue: 34 Vol. 59

Country of Publication:: United States

Language:: English

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