Catalytic Upgrading of Biomass Pyrolysis Vapors at Bench Scale with Pt/TiO2 [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 631.5 Cultivation and harvesting
• 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, 2019
• Mô tả vật lý: Size: 703 KB : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 264180
• Chủ đề: 1. 09 biomass fuels; 2. 37 inorganic, organic, physical, and analytical chemistry; 3. Biofuel; 4. Biomass; 5. Cctpl

Tóm tắt

 Vapor phase upgrading can produce a liquid of lower oxygen and higher energy density than can fast pyrolysis alone. Therefore, it is anticipated that catalytic pyrolysis followed by a single stage of hydrotreating will be a more cost-effective route to hydrocarbon fuels than fast pyrolysis with multiple-stage or more-severe hydrotreating. To this end, a bench-scale bubbling fluidized bed pyrolyzer was operated at 150 g/h feed rate of pine flour with a 100 g fixed-bed catalytic upgrader. A 0.5% Pt/TiO2 catalyst produced a lower oxygen (<
  20%) liquid at 40% carbon efficiency at 400 degrees C and biomass-to-catalyst ratio (B:C) of 3 for numerous cycles. The catalyst was regenerated and reused by oxidation with air and reduction with hydrogen. The oxidation and reduction times were reduced to 2 h and 1 h respectively without compromising performance or catalyst temperature control. Increasing the pyrolysis temperature from 500 degrees C to 550 degrees C allowed operation at B:C greater than 3 at comparable performance. Performance was generally similar to 2% Pt/TiO2 but at reduced catalyst cost. Projected costs are <
  $4/gallon of gasoline blendstock. Responses to other parameter changes and prospects for further improvements will be discussed.