燃烧固硫反应的动力学和热力学及其影响固硫产物分解因素的研究

Study on the Combustion Captured Sulfur Dynamic and Thermodynamics and its Effect on the Decomposition Factor of Captured Sulfur Product

煤在高温条件下燃烧不利于固硫反应 ,并从热力学角度出发 ,得出了煤燃烧中钙基固硫剂反应自由能与温度的关系函数。由化学反应动力学得出了硫酸钙分解反应的动力学方程及其相关参数。在还原性气氛中 ,从理论和实验上都证明了硫酸钙在较低温下会发生二次分解 ,理论分解温度与实际分解温度非常吻合。煤灰中氧化钙和三氧化二铝的存在 ,可以提高硫酸钙的分解温度。

The coal combustion at high temperature is unfavorable for the captured sulfur reaction. The functional relation between the temperature and the reaction free energy of calcium basis captured sulfur agent during coal combustion is obtained based on the thermodynamics principle. The dynamics equation and its interrelation parameters of calcium sulfate decomposition may gain from chemistry reaction dynamics. At the reduction atmosphere condition, the secondary decomposition of calcium sulfate will be happened at more low temperature that is demonstrated by the theory and experiment. Theory and practice decomposition temperature is very identical. The calcium sulfate decomposition temperature may increase if the CaO and Al 2 O 3 exist in coal ash. Application condition of calcium basis captured sulfur agent is also provided.