生物质选择性脱灰脱氧与催化热解多联产的耦合机制研究

生物质常规热解产物的品质不高，以产物高质化为目标的热解多联产机理成为研究者关注的焦点。明确热解链中原料预处理、催化裂解和产物品质三者之间的关联耦合机制，是实现产品高质化的重要途径。基于此，本项目以生物质及其组分模化物为实验原料、以烘焙脱氧和油洗脱灰为预处理方式，以定量定性测试为分析手段、以常规和催化热解为实验方法，深入研究（1）生物质脱灰脱氧预处理方法及其过程机理、（2）选择性脱灰脱氧与热解过程的关联匹配机理、（3）常规热解和催化热解对有限目标产物的调控机理、（4）基于产物高质化的“预处理-热解条件-产物品质”的耦合机理。建立从预处理到产物品质的关系模型，揭示选择性脱灰脱氧耦合催化热解制备目标产物（如富含单环芳烃生物油、低灰分生物质炭、高CO2含量燃气）的过程机理。通过本项目的实施，不仅能够寻求一种生物质预处理方法，而且会促进复杂热解机理的认知，为多联产技术的发展提供数据基础和理论依据。

The quality of pyrolysis products obtained from conventional pyrolysis is not high. Biomass pyrolysis polygeneration to product high-quality products has become the focus of research. It is an important way to prepare high-quality products by determining the coupling mechanism of biomass pretreatment, catalytic pyrolysis and product property. Based on this, the biomass and its model components, quantitative and qualitative testing, and conventional and catalytic pyrolysis are used as the experiment materials, analysis tools, and experiment methods, respectively; and torrefaction deoxygenation and bio-oil washing deashing are used for biomass pretreatments. This project is mainly focused on the following four aspects: (1) biomass deashing and deoxygenation pretreatment method and its process mechanism, (2) matching mechanism of biomass pretreatment correlated with pyrolysis process, (3) regulation mechanism of conventional pyrolysis and catalytic pyrolysis on finite target products, (4) coupling mechanism of “pretreatment, pyrolysis conditions and product quality”. The objectives of this project are to establish the relationship model from pretreatment to product quality, and to find the process mechanism of selective deashing and deoxygenation pretreatment coupled with catalytic pyrolysis polygeneration for preparing target products (such as rich in monocylic aromatics bio-oil, low ash biochar, and high CO2 content gas). This project contributes to finding an effective method of biomass pretreatment and promoting the understanding of biomass pyrolysis mechanism, which will provide data and theoretical basis for development of pyrolysis polygeneration technology.