Interaction mechanism and kinetic modeling of anthracite and power plant biomass waste during CO2 co-gasification process

Han Dang, Runsheng Xu, Jianliang Zhang, Mingyong Wang and Jinyin Zhang

Energy, 2025, vol. 325, issue C

Abstract: This study conducted a thorough investigation into the co-gasification behavior and synergistic effects of anthracite (ZT) and biomass carbon residual (CR) from power plants using a non-isothermal thermogravimetric method in a CO2 atmosphere. The inclusion of CR significantly impacted the gasification process, with a pronounced synergistic effect observed at a biomass ratio of 75 %, particularly in the high-temperature phase. Alkali and alkaline-earth metal species (AAEMs) were identified as the primary factors for these synergistic effects, and the study unveiled the mechanism behind their catalytic role in CO2 gasification reactions. Three nth-order gas-solid models were employed to simulate the gasification process: the volumetric reaction model (VM), the random pore model (RPM), and the unreacted core model (URCM). Among these, the RPM demonstrated the highest degree of accuracy in fitting the experimental data. Furthermore, the blend with a 50 % addition ratio of CR exhibited the lowest apparent activation energy, which was 75.38 kJ/mol.

Keywords: Synergistic effects; Biomass carbon residual; Co-gasification; Kinetic models (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:325:y:2025:i:c:s0360544225017578

DOI: 10.1016/j.energy.2025.136115

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