Optimizing co-combustion synergy of soil remediation biomass and pulverized coal toward energetic and gas-to-ash pollution controls

Chen, ZhibinChen, ZhiliangLiu, JingyongZhuang, PingEvrendilek, FatihHuang, ShengzhengChen, TaoXie, WumingHe, YaoSun, Shuiyu2023-08-112023-08-112023Chen, Z., Chen, Z., Liu, J., Zhuang, P., Evrendilek, F., Huang, S., ... & Sun, S. (2023). Optimizing co-combustion synergy of soil remediation biomass and pulverized coal toward energetic and gas-to-ash pollution controls. Science of The Total Environment, 857, 159585.0048-96971879-1026http://dx.doi.org/10.1016/j.scitotenv.2022.159585https://hdl.handle.net/20.500.12491/11488his research was fi nancially supported by the National Natural Science Foundation of China (Nos. 51978175, 42177196) , Guangdong Province Science and Technology Planning Project, China (No. 2022A0505050076) , the Scienti fi c and Technological Planning Project of Guangzhou, China (No. 202103000004) , and Natural Science Foundation of Guangdong Province, China (Nos. 2022A1515010825, 2019A1515012131) . We would like to thank Miss. Yang at Analysis and Test Center of Guangdong University of Technology for her assistance with TG-FTIR-GC/MS analysis.The co-combustion synergy of post-phytoremediation biomass may be optimized to cultivate a variety of benefits from re ducing dependence on fossil fuels to stabilizing heavy metals in a small quantity of ash. This study characterized the thermo kinetic parameters, gas-to-ash products, and energetically and environmentally optimal conditions for the co-combustions of aboveground (PG-A) and belowground (PG-B) biomass of Pfaffia glomerata (PG) with pulverized coal (PC). The mono combustions of PG-A and PG-B involved the decompositions of cellulose and hemicellulose in the range of 162–400 °C and of lignin in the range of 400–600 °C. PG improved the combustion performance of PC, with the blends of 30 % PG A and 70 % (PAC37) and 10 % PG-B and 90 % PC (PBC19) exhibiting the strongest synergy. Both PG-A and PG-B interacted with PC in the range of 160–440 °C, while PC positively affected PG in the range of 440–600 °C. PC decreased the apparent activation energy (Eα) of PG, with PBC19 having the lowest Eα value (107.85 kJ/mol). The reaction order models (Fn) best elucidated the co-combustion mechanisms of the main stages. Adding >50 % PC reduced the alkali metal content of PG, prevented the slagging and fouling depositions, and mitigated the Cd and Zn leaching toxicity. The functional groups, vol atiles, and N- and S-containing gases fell with PAC37 and PBC19, while CO2 emission rose. Energetically and environmen tally multiple objectives for the operational conditions were optimized via artificial neural networks. Our study presents controls over the co-circularity and co-combustion of the soil remediation plant and coaleninfo:eu-repo/semantics/closedAccessSoil Remediation PlantsOptimization of SynergyKineticsMineral TransformationsTG-FTIR-GCMSOptimizing co-combustion synergy of soil remediation biomass and pulverized coal toward energetic and gas-to-ash pollution controlsArticle10.1016/j.scitotenv.2022.159585857125362724842-s2.0-85140448958Q1WOS:000897151600008Q1