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Updated: May 31, 2026

Fast Pyrolysis of Biomass Residues in a Twin-screw Mixing Reactor
Published on: September 9, 2016
Effect of temperature on gas composition and char structural features of pyrolyzed agricultural residues
Peng Fu1, Weiming Yi, Xueyuan Bai
1School of Agricultural and Food Engineering, Shandong University of Technology, Zibo 255049, China.
Abstract:
The gases and chars produced during fast pyrolysis of maize stalk, rice straw, cotton straw and rice husk at temperatures ranging from 600 to 1000°C were studied by Fourier transform infrared spectroscopy, non-dispersive infrared technique, thermal conductivity detection method, ultimate analysis, X-ray diffraction, helium density measurement and N(2) adsorption method. The gas yield increased by more than 80% from 600 to 1000°C, while the char and liquid yield decreased. The content of CO(2), CO and CH(4) accounted for more than 86%. The CO and CH(4) content increased with temperature, while the CO(2) content decreased. The hydroxyl, aliphatic CH, carbonyl, olefinic CC and ether groups were lost above 800°C. Carbon skeleton shrinkage increased by more than 23% when the temperature increased from 600 to 1000°C. Maximum porosity appeared at 900°C. This study revealed the relationships between gas composition/char properties and pyrolysis temperature under high heating rate conditions.
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