生物质三组分烘焙脱氧及其对热解液体产物的调控机制研究

原料预处理作为生物质热解工艺的第一环，具有至关重要的作用。烘焙脱氧预处理是一种改善生物质原料品质，并进而通过快速热解制备高品质生物油的有效方法。基于此，本项目从生物质低品位性——这一源头问题，构建氧元素转化路线图——这一关键问题出发，围绕生物质烘焙脱氧制备低含氧生物油这一核心问题，以三组分原料为基础、脱氧过程为核心、定量分析为手段、调控机制为目标，深入研究纤维素、半纤维素和木质素在烘焙脱氧中的演变规律和结构调变机理；探索烘焙条件对生物质三组分热解产物分布规律及品质特性的影响；建立 “烘焙-热解”的耦合机理模型，最终构建“生物质—三素分离—烘焙脱氧—快速热解—生物油”各阶段氧元素存在、生成、脱除、转化路线图。通过本项目的实施，不仅能够寻求一种获得低含氧量生物油的有效方法，而且还会促进生物质预处理技术的发展和生物质复杂多组分热解机理的认知，为生物油品质的提升提供重要的数据基础和理论依据。

As the first link of biomass pyrolysis process, biomass pretreatment has a vital role in the quality of biomass pyrolysis product (bio-oil). Torrefaction deoxygenations pretreatment can effectively improve the quality of biomass raw materials, which is a very promising approach for high-quality bio-oil preparation through fast pyrolysis. The aim of project is to obtain high-quality bio-oil form torrefaction deoxygenations pretreatment of biomass. As the low grade of biomass is the source problem for low-quality bio-oil, the study of this project will focus on the key issue that building oxygen transformation roadmap. Cellulose, hemicellulose and lignin will be used as the experimental materials, and the quantitative analysis will be applied to reveal the regulatory mechanism of torrefaction deoxygenation. The research contents of this project are (i) in-depth investigation of the physicochemical properties changes and the structure modulation mechanism of cellulose, hemicellulose, and lignin in torrefaction deoxygenation process, (ii) the influence of torrefaction deoxygenation conditions on the distribution and quality characteristics of three components pyrolysis product, (iii) founding the coupling mechanism model of the "torrefaction - pyrolysis", (iv) building the existing, generating, removing, and transformation roadmap of oxygen base on the whole process of "biomass - three hormones - torrefaction deoxidization - fast pyrolysis - bio-oil". From the research results of this project, it can not only seek a kind of effective method to obtain low oxygen bio-oil, but also promote the development of biomass pretreatment technology and the understanding of complex biomass pyrolysis mechanism, which will provide important data and theoretical basis for biomass updating and high-quality bio-oil preparation.