高碱煤燃烧过程中Na、K的升华、冷凝行为及其多相界面(气-固界面、气-液-固界面、液-固界面)上的复杂物理化学作用，致使高碱煤在燃烧过程中呈现出独特的多相界面粘附特性。本项目紧密围绕开发适合高碱煤电站锅炉技术所需亟待解决的关键科学问题，采用理论研究(量子化学计算、化学热力学平衡、高温相变理论等)与实验研究相结合的研究方法，从煤中矿物质微观分子结构的物理-化学特性和煤灰物理相变变化特性两个层面上深入研究、探索高碱煤燃烧过程中Na、K的升华、冷凝行为及其多相界面上的复杂物理化学变化过程及其作用机理；研究高碱煤燃烧过程中多相界面表面灰的粘附行为变化特性及其形成机制；结合化学热力学平衡理论和高温相变理论，建立基于煤中矿物质组成能够真实反映高碱煤燃烧过程中灰的行为变化特性的多相界面表面粘附行为预测模型，为开发适合高碱煤电站锅炉技术奠定基础，具有十分重要的现实意义和工业应用价值。

The process of sublimation and condensation of alkali metal and the complicated physical chemistry actions along with alkali minerals on multi-interface(gas-solid interface, gas-liquid-solid interface, liquid-solid interface) during coal combustion with high content alkali metal is the main reason of the specific ash behavior. The key scientific issues of developing power plant boiler technology which is suit for using high content alkali coal metal will be used in this project. By combination of theory analysis and experimental study the process of sublimation and condensation of alkali metal and the complicated physical chemistry actions along with alkali minerals on multi-interface during coal combustion with high content alkali metal will be studied at both macro ash behavior characteristics and micro molecular structure properties of mineral levels. The complex physiochemical reaction mechanism among alkali minerals on muti-interface will be deeply studied and well known. Based on the well known on the effect of ash melting behavior on ash deposition characteristics on multi-interface during coal combustion and owned experimental data, by using the theory of chemical thermodynamic equilibrium and phase transition equilibrium, the prodiction of ash adhesion behavor on mutil-interface based on minerals composed during high content alkali coal combustion will be built. The result of this project will lay the foundantion for developing the power plant boiler technology which is suit for using high content alkali coal metal.