title: Effect of pyrolysis temperature on the chemical oxidation stability of bamboo biochar.
abstract: Biochar produced by biomass pyrolysis has the advantage of carbon sequestration. However, some of the carbon atoms in biochar are not very stable. In this study, the effect of pyrolysis temperature on the chemical oxidation stability of bamboo biochar was investigated using the atomic ratios of H/C and O/C, Fourier transform infrared spectroscopy, and potassium dichromate (K2Cr2O7) oxidation spectrophotometric method. The results show that the carbon yield and ratios of H/C and O/C decreased from 71.72%, 0.71, and 0.32 to 38.48%, 0.22, and 0.06, respectively, as the temperature was increased from 300°C to 700°C. Moreover, the main oxygen-containing functional groups gradually decreased, while the degree of aromatization increased accordingly. The biochar showed a better stability at a higher pyrolysis temperature. The proportion of carbon loss, i.e., the amount of oxidized carbon with respect to the total carbon of the biochar, decreased from 16.52% to 6.69% with increasing temperature.
authors.affiliation: College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Dengyu
authors.initials: D
authors.lastname: Chen
authors.affiliation: College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Xinzhi
authors.initials: X
authors.lastname: Yu
authors.affiliation: College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Song
authors.affiliation: College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Pang
authors.affiliation: College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Huang
authors.affiliation: College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China. Electronic address: liyjnjfu@163.com.
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Li
mesh_terms: D002606:Charcoal / Q000737:chemistry*; D006358:Hot Temperature; D010084:Oxidation-Reduction; D031787:Sasa / Q000737:chemistry*
chemical_list: C540010:biochar; D002606:Charcoal
keywords: Bamboo; Biochar; Potassium dichromate; Pyrolysis; Stability