NiMg/Ceria-Zirconia Cylindrical Pellet Catalysts for Tri-reforming of Surrogate Biogas [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 668.5 Perfumes and cosmetics
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Science ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2017
• Mô tả vật lý: Size: p. 845-855 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 263092
• Chủ đề: 1. 09 biomass fuels; 2. Biogas; 3. Biomass; 4. Fts; 5. Reforming

Tóm tắt

 Cylindrical NiMg/Ce<
 sub>
 0.6<
 /sub>
 Zr<
 sub>
 0.4<
 /sub>
 O<
 sub>
 2<
 /sub>
  pellet catalysts with two different sizes (large: radius = 1.59 mm
  and small: radius = 0.75 mm) were produced by extrusion of powder catalysts. The small catalyst pellets had a higher specific surface area, pore volume, average pore size, radial crush strength, and resistance to breakage than the large ones. Tri-reforming tests with surrogate biogas were conducted at 3 bar and 882 �C, with the feed molar ratios of CH<
 sub>
 4<
 /sub>
 : CO<
 sub>
 2<
 /sub>
 : air fixed at 1.0: 0.7: 0.95 and the H<
 sub>
 2<
 /sub>
 O/CH<
 sub>
 4<
 /sub>
  molar feed ratio (0.35 ? 1.16) varied. The small catalyst pellets exhibited lower internal mass transfer resistance and higher coking resistance, compared to the large ones. CO<
 sub>
 2<
 /sub>
  conversion decreased and H<
 sub>
 2<
 /sub>
 /CO molar ratio increased with the increase of H<
 sub>
 2<
 /sub>
 O/CH<
 sub>
 4<
 /sub>
  molar feed ratio, which are consistent with the trends predicted by thermodynamic equilibrium calculations. Finally, the results indicate that the NiMg/Ce<
 sub>
 0.6<
 /sub>
 Zr<
 sub>
 0.4<
 /sub>
 O<
 sub>
 2<
 /sub>
  catalyst pellets are promising for commercial scale applications.