焦炭与CO2 的气化反应是生物质气化炉内的主要反应方式之一，焦炭气化模型的研究对于气化设备的优化设计具有重要意义。针对现有气化模型参数缺乏可遵循的准则和理论依据积累的现状，项目将以澄清生物质快速热解气化反应过程中非催化气化动力学机理为切入点，从焦炭活性位生成规律出发，引入基于过渡态理论的反应方程，采用理论分析、模型构建和原理性实验相结合的方法，进行生物质焦炭化学活性、生物质焦炭气化反应动力学、CO2 扩散对气化过程的影响、焦炭气化过程的数值模拟等四个方面的研究，重点探索和建立焦炭化学活性和种类、化学反应动力学参数与气化条件之间等两个关键关系，并以此为基础构建焦炭活性预测、焦炭气化反应动力学及扩散-动力联合控制气化等三个通用模型。通过与实验结果的对比、验证和优化，最终提出一种适用于CO2 气氛下不同生物质焦炭非催化气化过程的模拟方法，为丰富气化理论和提高气化炉的设计精度做出贡献。

The reaction of char with CO2 is the main reaction in the biomass gasifier and the research of char gasification is of great significance for the optimization design of the gasification equipment. Considering that the current gasification model parameters lack the criteria and theoretical basis to follow, the project will try to clarify the biomass non-catalytic gasification kinetics under the CO2 atmosphere. Regarding the generation law of char active site as the research starting point, and then introducing the reaction equation based on transition state theory, the researches on the following four aspects will be carried out using the research methods combining the theoretical analysis, numerical modeling and principle experiments, such as the biomass char chemical reactivity, the biomass char gasification kinetics, the effect of CO2 diffusion on the gasification process and the numerical simulation of biomass char gasification process. This project will build up the two relationships, one is the char type with its chemical reactivity, and the other is the gasification conditions with the chemical reaction kinetic parameters. As a result, the three key models, which are used to predict the char reactivity, char gasification rate and the diffusion effect, will be developed. By comparison with the experimental results, the project will supply a general modeling method finally for the biomass char non-catalytic gasification process under the CO2 atmosphere, which can be used to improve the gasification theory and the engineering design accuracy.