Here in this study, the genuine role of CO₂ in co-pyrolysis of swine manure and coal was mainly investigated to increase the thermal efficiency of the thermo-chemical process. The TGA test of swine manure and coal revealed that the CO₂ co-feeding impact on any reactions (≤740 °C) between CO₂ and the sample surface (i.e., heterogeneous reaction) should be excluded. A batch-type co-pyrolysis revealed two genuine CO₂ co-feeding impacts on co-pyrolysis of swine manure and coal. First, CO₂ can be an additional source for C and O through a plausible reaction between pyrolytic oil and CO₂, which led to the enhanced generation of CO by the conversion of volatile organic carbons (VOCs) evolved from thermal deconstruction of pyrolytic substrate. Second, CO₂ expedite the thermal cracking of VOCs, which also resulted in the more generation of H₂ and CH₄. Two genuine roles of CO₂ in co-pyrolysis of swine manure and coal occurred independently. All experimental findings will be directly applicable to the gasification process since pyrolysis is an intermediate step for the gasification.

在本研究中，主要研究了CO ₂在猪粪和煤共热解中的真正作用，以提高热化学过程的热效率。猪粪和煤的TGA试验表明，应排除CO ₂共同进料对CO ₂与样品表面之间的任何反应（≤740°C）（即非均相反应）的影响。间歇式共热解显示了两个真正的CO ₂共进料对猪粪和煤共热解的影响。首先，通过热解油和CO ₂之间的合理反应，CO ₂可以成为C和O的额外来源，这导致了热分解底物的热解构过程中产生的挥发性有机碳（VOC）的转化，从而提高了CO的生成。其次，CO ₂促进了VOC的热裂解，这也导致了H ₂和CH ₄的更多生成。CO ₂在猪粪和煤共热解中的两个真正作用是独立发生的。由于热解是气化的中间步骤，因此所有实验结果都将直接适用于气化过程。