Abstract: The experiments of sulphur absorption characteristics of limestone particles have been carried out in an experimental equipment and TGA.A model used to simulate the process in which the calcina-tion and sulphur absorption reactions of limestone occured simultaneously was analyzed and established.Masss transfer coefficient α_(co_2) and diffusion coefficient D_(CO_2) of CO_2 through the calcined CaO were obtained by regressing the test data.The rationality of the model was examined by making comparison between the calculated values of model and the experimental results.

摘要： 在燃烧固硫试验系统和LCT－2型热天平上对石灰石固硫反应特性进行了试验研究．建立了石灰石煅烧与固硫反应同时进行时的数学模型，并通过试验结果的计算机处理，得到CO_2通过固硫剂颗粒的扩散系数D_(co_2)与传质系数a_(co_2).模型的合理性通过理论计算与试验结果的比较得到了验证．