生物质低温脱氧及其与热解过程的关联耦合机制研究

项目名称： 生物质低温脱氧及其与热解过程的关联耦合机制研究

项目编号： No.51306067

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 能源与动力工程

项目作者： 杨晴

作者单位： 华中科技大学

项目金额： 25万元

中文摘要： 低温脱氧，通常指390℃以下的生物质热预处理方式，能降低生物质含水量和含氧量，改善物化结构，提高热化学反应性，对后续热转化过程有益。而热解是实现生物质高质化利用的主要途径之一，深入研究低温脱氧过程机理，尤其是脱氧机制，及其与后续热解的关联耦合机制是生物质热转化领域的关键问题。本项目以我国典型农业秸秆为研究对象，采用实验研究、理论分析与模拟研究相结合，基于生物质分子组成和结构，从原料特性、纤维组成、关键基团的断裂、氧元素的析出路径等角度，深入揭示秸秆低温脱氧过程理化结构的演变机制和产物品质的调变机理，并把重点放在脱氧机制上；进而从热解产物有效成分综合富集的角度，研究其与后续热解过程关联耦合机制，并采用动态生命周期的方法对系统综合能效进行优化分析，其研究结果将有助生物质热预处理及热解高效转化理论与控制方法的建立，从而为生物质高质化利用技术的发展提供科学的依据，促进我国生物质资源高质化利用。

中文关键词： 生物质；热解；脱氧；官能团；生物油

英文摘要： Low-temperature deoxygenation, generally referring to the biomass thermal pretreatment below 390 ℃, may find potential extensive application in the reduction of moisture and oxygen content in biomass resources, as well as the improvement embodied in materialized structure and thermal chemical reactivity, which is beneficial for subsequent thermal conversion processes. A deep study into the deoxygenation process, in particular the deoxygenation mechanism, is therefore emerging as the key issue to be addressed in the area of biomass thermal conversion. Since pyrolysis is regarded as one of the main approaches to attain comprehensive high-quality utilization of biomass resources, it is of significant importance to investigate the correlated coupling mechanism between low-temperature deoxygenation and subsequent pyrolysis processes. With a combination of experimental study, theoretical analysis and simulation serving as research tools, this project sets typical agricultural straw in China as the research object. Proceeding from the molecular organization and structure, with due consideration of raw material characteristics, fiber composition, rupture of key perssad and precipitated path of oxygen, the project deeply reveals the evolvement mechanism of straw physical & chemical structure within the deoxygenation proc

英文关键词： biomass；pyrolysis；deoxygenation；functional groups；bio-oil