生物质快速热解分级冷凝制备液体燃料研究  

Production of liquid fuel through fractional condensation of biomass fast pyrolysis

作　　者：李龙飞[1] 骆仲泱 杜立文 王树荣[1] 王凯歌[1] 管文洁[1] 姜思远 LI Longfei;LUO Zhongyang;DU Liwen;WANG Shurong;WANG Kaige;GUAN Wenjie;JIANG Siyuan(State Key Laboratory of Clean Energy Utilization,Zhejiang University,310027 Hangzhou,China)

机构地区：[1]浙江大学能源高效清洁利用全国重点实验室,杭州310027

出　　处：《煤炭转化》2025年第2期47-57,共11页Coal Conversion

基　　金：国家重点研发计划项目(2023YFE0111600);中央高校基本科研业务费专项资金项目(226-2024-00130).

摘　　要：在中试规模流化床热解反应器中进行了杨木的快速热解实验,重点研究分级冷凝系统对生物油品质的调控作用。采用两级冷凝加一级静电捕集的分级冷凝策略收集生物油,结果表明:静电捕集获得的生物油中酚类化合物占比显著提升(相对峰面积为30%~45%),而不稳定组分酸类、醛类的含量降低至5%和2%,热值提高至21.73 MJ/kg,较前两级冷凝获得的生物油的热值提升18%。通过分级冷凝实现了生物油组分的选择性富集,为生物油定向提质提供了理论参考。进一步分析了不同冷凝方式下生物油的理化特性差异,发现静电捕集获得的生物油具有更低的含水率(7.12%)和更高的能量密度。本研究验证了分级冷凝技术在中试规模流化床系统中的可行性,为生物质液体燃料的高值化利用提供了技术支撑。Fast pyrolysis experiments of poplar wood were conducted in a pilot-scale fluidized bed pyrolysis reactor,with a focus on studing the regulatory effect of a staged condensation system on the quality of bio-oil.The experiments employed a staged condensation strategy consisting of two-stage condensation followed by one-stage electrostatic collection to gather bio-oil.The results indicate that the proportion of phenolic compounds in the bio-oil obtained through electrostatic collection is significantly increased(relative peak area of 30%−45%),while the contents of unstable components such as acids and aldehydes are reduced to 5%and 2%,respectively.The heating value is enhanced to 21.73 MJ/kg,representing an 18%improvement compared to the bio-oil from the first two-stages of condensation.Selective enrichment of bio-oil components is achieved through staged condensation,providing a theoretical reference for the targeted upgrading of bio-oil.The physicochemical property differences of bio-oil under different condensation methods were further analyzed.It shows that the electrostatically collected bio-oil has a lower water content(7.12%)and a higher energy density.This research validates the feasibility of staged condensation technology in pilot-scale fluidized bed systems and provides technological support for the high-value utilization of biomass liquid fuels.

关 键 词：生物质 快速热解 流化床 生物油 产物分布 

分 类 号：TK6[动力工程及工程热物理—生物能]