Pyrolysis has been broadly applied to biomass valorization process to convert solid biomass waste into three phase value-added products such as biochar, pyrolytic oil, and pyrolytic gas. The carbon rearrangement process is highly affected by contents of cellulose, hemicellulose, and lignin due to their different structures. In this respect, this study laid great emphasis on the thermolytic behaviors of cellulosic corn stover (CS) and lignin-rich oak wood (OW) to understand carbon reallocations of them as a case study. In addition, CO₂ was employed as a reaction medium for biomass pyrolysis to control the carbon redistribution between CO₂ and CS/OW in line with the achievement of sustainable thermo-chemical conversion of biomass consuming a greenhouse gas (i.e., CO₂). Lignin-rich OW showed higher tolerance to thermal degradation, thereby resulting in more biochar and less pyrolytic oil formations. During the CO₂-assisted pyrolysis, carbon redistribution was appeared between liquid and gas phase products. This showed the gas phase reactions (GPRs) between volatilized liquid pyrolysates and CO₂ with additional CO formation. To expedite the GPRs, Ni/SiO₂ catalyst was employed. The CO₂-assisted catalytic pyrolysis of CS and OW significantly improved dehydrogenation and deoxygenation, showing more than one order of magnitude higher production of H₂ and CO.

热解技术已被广泛应用于生物质的增值过程，将固体生物质废物转化为三相增值产品，例如生物炭，热解油和热解气。由于纤维素，半纤维素和木质素的结构不同，碳重排过程受到很大影响。在这方面，本研究重点研究了纤维素玉米秸秆（CS）和富含木质素的橡木（OW）的热解行为，以了解它们的碳分配。此外，CO ₂被用作生物质热解的反应介质，以控制消耗温室气体的生物质（即，生物质的可持续热化学转化）的实现，从而控制CO ₂和CS / OW之间的碳重分布。CO ₂）。富含木质素的OW对热降解表现出更高的耐受性，从而导致更多的生物碳和更少的热解油形成。在CO ₂辅助的热解过程中，在液相和气相产物之间出现了碳的重新分布。这表明挥发的液体热解产物和CO ₂之间发生了气相反应（GPR），并形成了额外的CO。为了加速GPR，使用了Ni / SiO ₂催化剂。CS和OW的CO ₂辅助催化热解显着改善了脱氢和脱氧作用，表明H ₂和CO的产量提高了一个数量级以上。