Catalytic Upgrading of Biomass Pyrolysis Vapors at Bench Scale with Platinum on Titania [electronic resource]

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Tác giả:

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: 717 KB : , digital, PDF file.

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ID: 264182

 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.
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