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研究了用催化剂提高CaO固硫率的可行性及其催化剂对固硫反应动力学的影响。用热天平研究了在CaO中添加不同催化剂后的固硫反应的进程,并用等效粒子模型来模拟和处理实验数据,计算了固硫反应动力学参数。结果表明,CaO固硫反应初期为表面化学反应控制阶段,后期转为产物层扩散控制阶段。碱金属的盐类催化剂均能使固硫反应前期的化学反应控制阶段的反应活化能E_α下降。E_α的大小按催化剂中Li~+、Na~+、Kt~+、Cs~+离子半径增大的顺序依次递减;而碱金属盐类催化剂使固硫反应后期的产物层扩散控制阶段的反应活化能E_P不同程度地增加。
The feasibility of improving the sulfur fixation rate of CaO with catalyst and the influence of its catalyst on the reaction kinetics of sulfur fixation were studied. The thermodynamic balance was used to study the progress of sulfur fixation reaction after adding different catalysts to CaO. The equivalent particle model was used to simulate and process the experimental data, and the kinetic parameters of sulfur fixation reaction were calculated. The results show that the initial stage of CaO desulfurization reaction is the surface chemical reaction control stage and the late stage is the product layer diffusion control stage. The alkali metal salt catalyst can make the reaction activation energy E_α of the chemical reaction control phase before desulfurization reaction descend. The size of E_α decreases with the increase of Li ~ +, Na ~ +, K ~ t ~ + and Cs ~ + ions in the order of increasing; while the alkali metal salt catalyst makes the diffusion layer The reaction activation energy E_P increased to some extent.