煤的O2/CO2燃烧技术是极具前景的碳捕集技术。目前应用的O2/CO2煤燃烧数学模型大都使用常规空气下的模型或初步的改进模型，其假设和参数等并不适用于高浓度CO2环境，预测的准确性还有待于提高。本项目拟深入系统地研究适用于煤O2/CO2燃烧的挥发分析出模型和焦炭燃烧模型。采用实验研究与理论研究相结合的方法，充分考虑气化反应、修改空气燃烧模型中不适用于O2/CO2燃烧的假设，使用O2/CO2燃烧的动力学参数等，最终获得一套可供多煤种选择的、反复经过实验验证和修正的、且具有一定准确性与一定范围内通用性的挥发分析出模型和焦炭燃烧数学模型。新模型还将应用于6kW流化床燃烧实验台中进行全炉膛数值模拟与实验，验证其有效性和实用性。本项目的研究将使O2/CO2燃烧过程的数值模拟更加准确，藉以研究燃烧过程中的现象与规律，指导O2/CO2燃烧系统和设备的开发与设计，具有重要的理论意义与应用价值。

O2/CO2 coal combustion (Oxy-coal combustion) is one of the most competitive and promising technology options for carbon capture and storage. Currently, the modeling of O2/CO2 coal combustion utilize the numerical coal combustion models similar to those developed for conventional air-coal combustion, their assumptions and approximations may not be valid in the CO2-rich environment, and the prediction accuracy is needed to be improved. This project will extensively study the coal devolatilization models and oxy-char combustion models. The experimental and simulation methods will be used in this study. The research should consider the contributions of gasification reactions, modify the invalid assumptions and approximations in a CO2-rich environment, and employ the O2/CO2 kinetics parameters. Finally, some functions of coal devolatilization models and oxy-char combustion models sorted by coal types will be developed and validated. The new numerical models will be used to modeling the whole furnace combustion and compared with the near pilot experimental data to validate the accuracy and practicality. This study will improve the prediction accuracy of O2/CO2 coal combustion, which will benefit to fundamental analyze the combustion phenomenon and characteristics, access and optimize the combustion systems and devices design.