期刊
JOURNAL OF CATALYSIS
卷 306, 期 -, 页码 47-57出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2013.05.020
关键词
Pd-Fe; Hydrodeoxygenation; Bimetallic catalysis; Bio-oil upgrading; Alloy catalyst; EXAFS; Carbon support
资金
- National Advanced Biofuels Consortium (NABC)
- Department of Energy's Office of Biomass Program
- US Department of Energy (DOE), Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biosciences
- U.S. Department of Energy's Office of Biological and Environmental Research, located at Pacific Northwest National Laboratory (PNNL) in Richland, WA
- US Department of Energy, Office of Basic Energy Sciences [DE-FG02-05ER15688]
- Voiland School of Chemical Engineering and Bioengineering
Carbon-supported metal catalysts (Cu/C, Fe/C, Pd/C, Pt/C, PdFe/C, and Ru/C) were characterized and evaluated for vapor-phase hydrodeoxygenation (HDO) of guaiacol (GUA), aiming at the identification/elucidation of active catalysts for high-yield production of completely hydrodeoxygenated products (e.g., benzene). Phenol was found to be the major intermediate on all catalysts. Saturation of the aromatic ring is the major pathway over the precious metal catalysts, forming cyclohexanone and cyclohexanol, followed by ring opening to form gaseous products. Base metal catalysts exhibit lower activity than the precious metal catalysts, but selectively form benzene along with small amounts of toluene, trimethylbenzene (TMB), and cresol without forming ring-saturated or ring-opening products. Compared with Fe/C and Pd/C, PdFe/C catalysts exhibit a substantially enhanced activity while maintaining the high selectivity to HDO products without ring saturation or ring opening. The enhanced activity of PdFe/C is attributed to the modification of Fe nanoparticles by Pd as evidenced by STEM, EDS, EXAFS, TPR, and theoretical calculations. (C) 2013 Elsevier Inc. All rights reserved.
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