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Updated: Feb 1, 2026

Biomass Conversion to Produce Hydrocarbon Liquid Fuel Via Hot-vapor Filtered Fast Pyrolysis and Catalytic Hydrotreating
Published on: December 25, 2016
Numerical simulation and experiment on catalytic upgrading of biomass pyrolysis vapors in V-shaped downer reactors
Yuchun Zhang1, Weiming Yi1, Peng Fu1
1School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, Shandong, China.
Abstract:
Catalytic upgrading of biomass pyrolysis vapors is an effective utilization technology of biomass energy. Based on the disadvantages of commonly used reactors, the V-shaped downer reactors were designed to increase gas-solid two-phase turbulent intensity, contact frequency and then increase the catalytic efficiency in short residence time. The catalytic upgrading of pyrolysis vapors in V-shaped downer reactors in terms of hydrodynamics, chemical reaction and residence time distribution were analyzed by CFD simulation and experiment. The results indicate that the solid concentration gradient decreases while flowing down. The overall mass fraction of the bio-oil vapors is around 50%. The mean residence time of catalysts in the V-shaped reactor is 2.0 s-3.0 s. The effects on product yield and residence time distribution were investigated for optimizing product selectivity and the performance of catalysts. In this paper the optimal flow rates of gas and catalysts are vg = 1.2 m s-1, vs = 0.4 m s-1.
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