Evaluation of Silica-Supported Metal and Metal Phosphide Nanoparticle Catalysts for the Hydrodeoxygenation of Guaiacol Under Ex Situ Catalytic Fast Pyrolysis Conditions [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 666.3 Pottery
• 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, 2015
• Mô tả vật lý: Size: p. 124-137 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 263605
• Chủ đề: 1. 09 biomass fuels; 2. 37 inorganic, organic, physical, and analytical chemistry; 3. Bio-oils; 4. Catalytic fast pyrolysis; 5. Guaiacol

Tóm tắt

 A series of metal and metal phosphide catalysts were investigated for the hydrodeoxygenation of guaiacol under ex situ catalytic fast pyrolysis (CFP) conditions (350 �C, 0.5 MPa, 12 H<
 sub>
 2<
 /sub>
 :1 guaiacol, weight hourly space velocity 5 h<
 sup>
 $-$1<
 /sup>
 ). Ligand-capped Ni, Pt, Rh, Ni<
 sub>
 2<
 /sub>
 P, and Rh<
 sub>
 2<
 /sub>
 P nanoparticles (NPs) were prepared using solution-phase synthesis techniques and dispersed on a silica support. For the metal phosphide NP-catalysts, a synthetic route that relies on the decomposition of a single molecular precursor was employed. The reactivity of the NP-catalysts was compared to a series of reference materials including Ni/SiO<
 sub>
 2<
 /sub>
  and Pt/SiO<
 sub>
 2<
 /sub>
  prepared using incipient wetness (IW) impregnation and a commercial (com) Pt/SiO<
 sub>
 2<
 /sub>
  catalyst. The NP-Ni/SiO<
 sub>
 2<
 /sub>
  catalyst exhibited the largest reduction in the oxygen mol% of the organic phase and outperformed the IW-Ni/SiO<
 sub>
 2<
 /sub>
  material. Although it was less active for guaiacol conversion than NP-Ni/SiO<
 sub>
 2<
 /sub>
 , NP-Rh2P/SiO<
 sub>
 2<
 /sub>
  demonstrated the largest production of completely deoxygenated products and the highest selectivity to anisole, benzene, and cyclohexane, suggesting that it is a promising catalyst for deoxygenation of aryl-OH bonds. Finally, the com-Pt/SiO<
 sub>
 2<
 /sub>
  and IW-Pt/SiO<
 sub>
 2<
 /sub>
  catalyst exhibited the highest normalized rate of guaiacol conversion per m<
 sup>
 2<
 /sup>
  and per gram of active phase, respectively, but did not produce any completely deoxygenated products.