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Production of Bio Oil by Using Larch Sawdust in a Bubbling Fluidized Bed Reactor

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Fast pyrolysis experiments of larch sawdust by using a bubbling fluidized bed (0.076 m I.D. × 0.8 m high) have been investigated to determine, particularly, the effect of temperature, U o /Umf ratio, length/diameter ratio of bed (L/D), particle size of the bed material, and O2 concentration on the bio oil yield and compositions. The operation conditions were as follows: temperature, 350–550°C; L/D, 1.0–3.0; U o /Umf ratio, 2.0–6.0; particle size, 60–128 μm; and O2 concentration, 0–15 vol%. As bio oil yield decreased with operation conditions, the gas yield increased and the number of chemical compounds in bio oil decreased. The maximum oil yield of 58 wt% was obtained at: temperature, 400°C; L/D ratio, 2.0; and O2 concentration, 0%.
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Keywords: bio oil; fast pyrolysis; fluidized bed; larch sawdust

Document Type: Research Article

Affiliations: 1: Department of Environmental Engineering, Kwangwoon University, Seoul, Korea 2: School of Environmental Engineering, University of Seoul, Seoul, Korea 3: Clean Fuel Department, Korea Institute of Energy Research, Daejeon, Korea 4: Department of Mineral Resources and Energy Engineering, Chonbuk National University, Jeonju, Korea

Publication date: July 3, 2013

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