Investigation on the co-pyrolysis of municipal solid waste and sawdust: pyrolysis behaviors, kinetics, and thermodynamic analysis

作者：Bin, Yanhui; Yu, Zhaosheng^*; Huang, Zigan; Li, Meirong; Zhang, Yaqi; Ma, Xiaoqian

来源：Energy Sources, Part A: Recovery, Utilization and Environmental Effects , 2022, 44(3): 8001-8011.

DOI：10.1080/15567036.2022.2116505

• sawdust
• municipal solid waste
• co-pyrolysis
• interaction
• synergistic effect

This paper aimed to disclose the interaction during the co-pyrolysis of sawdust (Wood) and municipal solid waste (MSW) using a thermogravimetric analyzer at the heating rates of 10, 30, and 50 degrees C/min. The results of thermogravimetric analysis (TGA) indicated that Wood enhanced the depolymerization reaction of plastics in MSW, while MSW could reduce the thermal decomposition temperature of lignocellulosic substances in Wood. In addition, the devolatilization indexes (D-i) for the blended samples were approximately 3 times that of Wood, and the maximum of which was -2.5729 x 10(-6) %center dot min(-1)center dot K-3 (in WM11), implying that co-pyrolysis was conducive to the release of volatile matter. Moreover, the apparent activation energy (E-alpha) was calculated by the Kissinger-Akahira-Sunose (KAS) and Flynn--Wall-Ozawa (FWO) methods. When the mass ratio of MSW to Wood was 1:1, the value of the average activation energy (E-ave) was optimal, which was 191.37 kJ/mol. Additionally, the experimental E-ave of WM11 was 15.15 kJ/mol lower than the theoretical. Furthermore, thermodynamic parameters (Delta H, Delta G, and Delta S) were calculated, and the results verified that co-pyrolysis was a feasible and advantageous way to convert waste into energy.