Characterization of Cornstalk and Bituminous Coal Based on Kinetic and Thermodynamic Parameter for Co-pyrolysis. Issue 1 (August 2020)

• Record Type: Journal Article
• Authors: He, Yuyuan; Qu, Yang; Liu, Qiong; Li, Pan; Fang, Shuqi; Chen, Junying; Chang, Chun
• Is Part Of: IOP conference series. Volume 555:Issue 1(2020)
• Publication Date: 2020-08
• Subjects: Co-pyrolysis -- thermogravimetric analysis -- kinetic model -- thermodynamic analysis.; Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/555/1/012001
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: The pyrolysis characteristic of bituminous coal (BC) and raw cornstalk (RC) were investigated through thermogravimetric analysis from environment temperature to 900 °C with 5, 15 and 25 °C/min. The distributed activation energy model (DAEM) was applied to estimate the kinetic parameters of samples. The average activation energy ( E a ) of BC, RC and the blended sample (mBC /mRC =6/4) were 304.56, 207.77 and 226.26 kJ/mol, respectively. The heat energies of the experiment to be needed was lower than that of calculation during co-pyrolysis, comparing with the theoretical calculation E a . To further researcher the thermal behavior during co-pyrolysis, the closeness of change in Enthalpy (Δ H ) values vs. E a values for the blend indicated that activated complex formation may be favored because of lower potential energy barrier. Moreover, Gibbs free energy (Δ G ) for the blend varied from 108.40 to 275.93 kJ/mol, the pyrolysis process was converted to disordered-state from ordered-state, considering the changes of Entropies (Δ S ) loss.