Enhanced Hydrothermal Stability and Catalytic Activity of LaxZryOz Mixed Oxides for the Ketonization of Acetic Acid in the Aqueous Condensed Phase

Journal Article · Fri Oct 06 04:00:00 EDT 2017 · ACS Catalysis

DOI:https://doi.org/10.1021/acscatal.7b01071· OSTI ID:1545072

Lopez-Ruiz, Juan A. ^[1]; Cooper, Alan R. ^[1]; Li, Guosheng ^[1]; Albrecht, Karl O. ^[1]

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1. BATTELLE (PACIFIC NW LAB)

Common ketonization catalysts such as ZrO2, CeO2, and TiO2-based catalysts have been reported to lose surface area, undergo phase transformation, and lose catalytic activity when utilized in the condensed aqueous phase. In this work, we synthesized a series of LaxZryOz mixed-metal oxides with different La:Zr atomic ratios with the goal of enhancing the catalytic activity and stability for the ketonization of acetic acid in condensed aqueous media at 568 K. We synthesized a hydrothermally stable LaxZryOz mixed-metal oxide catalyst with ketonization activity360 and 40 times more active than La2O3 and ZrO2, respectively. Catalyst characterization techniques suggest that the enhanced stability of the LaxZryOz catalysts is observed with the formation of a phase isomorphic with tetragonal ZrO2. DRIFT spectroscopy measurements indicated the enhanced catalytic activity of LaxZryOz catalysts correlated with greater acetic acid surface population in the presence of H2O versus pure ZrO2.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1545072
• Report Number(s): PNNL-SA-125061
• Journal Information: ACS Catalysis, Journal Name: ACS Catalysis Journal Issue: 10 Vol. 7
• Country of Publication: United States
• Language: English

Related Subjects

ketonization
deoxygenation
carboxylic acid
acetic acid
hydrothermal stability: acetone production
ZrO2
La2O3
LaxZryOz