Temperature-programmed deoxygenation of acetic acid on molybdenum carbide catalysts [electronic resource]

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Tác giả:

Ngôn ngữ: eng

Ký hiệu phân loại: 668.9 Polymers and polymerization

Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Energy Efficiency and Renewable Energy ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2017

Mô tả vật lý: Size: 17 p. : , digital, PDF file.

Bộ sưu tập: Metadata

ID: 264524

Temperature programmed reaction (TPRxn) is a simple yet powerful tool for screening solid catalyst performance at a variety of conditions. A TPRxn system includes a reactor, furnace, gas and vapor sources, flow control, instrumentation to quantify reaction products (e.g., gas chromatograph), and instrumentation to monitor the reaction in real time (e.g., mass spectrometer). Here, we apply the TPRxn methodology to study molybdenum carbide catalysts for the deoxygenation of acetic acid, an important reaction among many in the upgrading/stabilization of biomass pyrolysis vapors. TPRxn is used to evaluate catalyst activity and selectivity and to test hypothetical reaction pathways (e.g., decarbonylation, ketonization, and hydrogenation). Furthermore, the results of the TPRxn study of acetic acid deoxygenation show that molybdenum carbide is an active catalyst for this reaction at temperatures above ca. 300 �C and that the reaction favors deoxygenation (i.e., C-O bond-breaking) products at temperatures below ca. 400 �C and decarbonylation (i.e., C-C bond-breaking) products at temperatures above ca. 400 �C.
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