Global consumption of tobacco has been continuously increasing. This results in the considerable generation of toxic waste materials from the tobacco industry and daily life. Conventional disposal methods for them (incineration and landfilling) could be a potential hazard for releasing carcinogens and toxins into our eco-system. Accordingly, an eco-friendly disposal platform for converting tobacco waste (TW) into syngas was mainly studied in this present work. To realize this, pyrolysis of two commercial cigarette products (Marlboro and HEETS (electronic cigarette)) was done under the CO₂/N₂ conditions. One of the main findings from the present study was that CO₂ reacted with volatile matters (VMs) obtained from the thermolysis of TW through the gas phase reactions (GPRs), which provided a strategic measure to manipulate carbon rearrangement of all pyrolysates. In particular, the GPRs expedited the carbon rearrangement of harmful chemical species, converting toxic chemicals into syngas. When the fraction of VMs in TWs increased, the GPR were more effective. Therefore, the introduced eco-friendly method using CO₂-mediated thermochemical process could be beneficial for energy recovery from TWs while mitigating the formations of harmful chemical species.

全球烟草消费量一直在不断增加。这导致从烟草业和日常生活中大量产生有毒废料。针对它们的常规处理方法（焚化和填埋）可能会导致致癌物和毒素释放到我们的生态系统中。因此，在本工作中，主要研究了将烟草废料（TW）转化为合成气的环保处置平台。为了实现这一点，在CO ₂ / N ₂条件下对两种商用卷烟产品（万宝路和HEETS（电子烟））进行了热解。本研究的主要发现之一是CO ₂通过气相反应（GPR）与TW热解获得的挥发性物质（VM）发生反应，这为控制所有热解产物的碳重排提供了一种战略措施。特别是，GPR加快了有害化学物质的碳重排，将有毒化学物质转化为合成气。当TW中VM的比例增加时，GPR更为有效。因此，采用CO ₂介导的热化学过程引入的生态友好方法可能有益于TWs的能量回收，同时减少有害化学物质的形成。