摘要
化石资源日益减少促进了生物质能源的研究,通过生物质热解制备得到的热解生物油是替代化石燃料的潜在产品,但热解生物油成分复杂,其分离与提质是较大挑战。近年来,涌现出多种热解生物油分离萃取的研究并取得较大进展。本文介绍了超临界二氧化碳萃取法在热解生物油分离中的应用,分析了热解生物油中水分及有机组分对萃取选择性的影响,通过“扩散控制”模型和“溶解控制”模型探讨了萃取机理,将萃取过程分为三个不同的阶段,明确了在不同阶段影响萃取率的参数,讨论了负载剂、压力、温度等参数对热解生物油分离萃取过程的影响,展望了未来的研究方向,以期为热解生物油的高效分离与萃取提供新的思路。
The decline of fossil resources and their environmental problems have driven the development of bioenergy.Pyrolysis bio-oil can be prepared through biomass pyrolysis,which is a liquid product with the potential to replace fossil fuels.Pyrolysis bio-oil has complex components,and its separation and upgrading are still facing challenges.In recent years,various studies on the separation and extraction of pyrolysis bio-oils have been carried out with effective techniques to upgrade pyrolysis bio-oils.The separation and extraction of pyrolysis bio-oil with supercritical carbon dioxide were illustrated.The influence of moisture and organic components in pyrolysis bio-oil on the extraction selectivity was analyzed.The extraction mechanism was discussed through the"diffusion-control"model and the"dissolutioncontrol"model.The extraction process was divided into three different stages,and the parameters affecting the extraction rate at different stages were clarified.The extraction mechanism along with the impact of process parameters such as carrier,temperature,and pressure were analyzed.Future research was concluded.Supercritical carbon dioxide was proved to be an alternative extraction method for the separation of pyrolysis bio-oils.
作者
张硕
赵东洋
潘炘
乔慧
庄晓伟
冯永顺
ZHANG Shuo;ZHAO Dongyang;PAN Xin;QIAO Hui;ZHUANG Xiaowei;FENG Yongshun(College of Environmental Science and Engineering,Liaoning Technical University,Liaoning Fuxin 123000;Zhejiang Academy of Forestry,Zhejiang Hangzhou 310023,China)
出处
《广州化工》
2026年第5期8-11,17,共5页
GuangZhou Chemical Industry
基金
浙江省省院合作林业科技项目(2022SY15)。
关键词
生物油
热解
超临界二氧化碳
萃取
bio-oil
pyrolysis
supercritical carbon dioxide
extraction
