The CO₂-activated co-pyrolysis technology presents promising potential to mitigate the environmental pollution and climate change. The dynamic analyses of evolved syngas, bio-oils, biochars, interaction effects, and reaction mechanisms of the co-pyrolysis of textile dyeing sludge (TDS) and Pteris vittata (PV) (hyperaccumulator biomass) were characterized and quantified comparatively in the three atmospheres. In the CO₂-assisted atmosphere, the gasification of PV began to prevail between 600 and 900 °C, while in the N₂ atmosphere, PV and TDS were stable at 750 °C. The CO₂-assisted co-pyrolysis reduced the apparent activation energy. The higher CO₂ concentration during gasification led to the higher activation energy. The CO emission level of the CO₂ and mixed atmospheres was almost 20 and 14 times that of the N₂ atmosphere, respectively. The CO release from the CO₂ atmosphere was 1.4 times that from the mixed atmosphere. CO₂ significantly changed the production pathway of biochar in the N₂ atmosphere, as was evidenced by the enhanced temperature sensitivity of O–C = O/hydroxy (−OH) in ester. Our findings research can provide new insights into the effectiveness of the CO₂-assisted co-pyrolysis associated with reduced costs and hazardous wastes.

CO ₂活化的共热解技术具有减轻环境污染和气候变化的潜力。在三个大气压下，对表征的合成气，生物油，生物炭，相互作用效应以及共染色的纺织品染色污泥（TDS）和紫檀（PV）（超级蓄积生物质）的反应机理进行了动态分析。。在CO ₂辅助气氛中，PV的气化在600至900°C之间开始盛行，而在N ₂气氛中，PV和TDS在750°C处稳定。CO ₂辅助的共热解降低了表观活化能。较高的CO ₂气化过程中的浓集导致更高的活化能。CO ₂和混合气氛的CO排放水平分别是N ₂气氛的近20倍和14倍。从CO ₂气氛中释放的CO是从混合气氛中释放的1.4倍。CO ₂显着改变了N ₂气氛中生物炭的生产途径，这可以通过酯中O = C / O /羟基（-OH）的温度敏感性增强来证明。我们的发现研究可以为与降低成本和危险废物相关的CO ₂辅助共热解的有效性提供新的见解。