title: Pyrolytic and kinetic characteristics of Platycodon grandiflorum peel and its cellulose extract.
abstract: The pyrolytic and kinetic characteristics of a biomass waste material, namely Platycodon grandiflorum A. DC (P. G.) peel and its cellulose extract were studied at heating rates of 10, 30 and 50 °C/min under a nitrogen flow atmosphere. The most probable mechanism function and activation energy pre-exponential factors were calculated by using the Popescu, FWO and KAS methods. The three stages appeared during pyrolysis include: moisture evaporation, primary devolatilization and residual decomposition. Significant differences in the average activation energy, thermal stability, final residuals and reaction rates of the P. G. peel and its cellulose extract were observed. Stage II of the P. G. peel and its cellulose extract could be described by the function Avrami-Erofeev [-ln(1-α)](3) and the function chemical reaction (1-α)(-0.5), respectively. The average activation energy of P. G. peel and its cellulose extract were 157 and 196 kJ/mol, respectively. Kinetic compensation effects of the pre-exponential factors and activation energy were also observed.
authors.affiliation: Qingdao Agricultural University, Zibo 255049, China.
authors.forename: Hong-Wei
authors.initials: HW
authors.lastname: Qiu
authors.affiliation: State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210032, China; School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255049, China. Electronic address: zhouquancheng@126.com.
authors.forename: Quan-Cheng
authors.initials: QC
authors.lastname: Zhou
authors.affiliation: School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255049, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Geng
mesh_terms: D002482:Cellulose / Q000737:chemistry* / Q000302:isolation & purification*; D007700:Kinetics; D031238:Platycodon / Q000737:chemistry*; D013696:Temperature
chemical_list: D002482:Cellulose
keywords: Cellulose; Kinetics; Platycodon grandiflorum peel; Pyrolysis