title: Effect of temperature on gas composition and char structural features of pyrolyzed agricultural residues.
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.
authors.affiliation: School of Agricultural and Food Engineering, Shandong University of Technology, Zibo 255049, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Fu
authors.forename: Weiming
authors.initials: W
authors.lastname: Yi
authors.forename: Xueyuan
authors.initials: X
authors.lastname: Bai
authors.forename: Zhihe
authors.initials: Z
authors.lastname: Li
authors.forename: Song
authors.initials: S
authors.lastname: Hu
authors.forename: Jun
authors.initials: J
authors.lastname: Xiang
mesh_terms: D018533:Biomass; D005740:Gases / Q000737:chemistry*; D006868:Hydrolysis; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D014961:X-Ray Diffraction
chemical_list: D005740:Gases