中文摘要：

为了研究石灰石煅烧产物CaO的孔隙特征与脱硫过程的关系，建立了CaO孔结构特征的数学模型，利用模型计算了CaO内部孔的比表面积和孔容积，计算值与实测值吻合良好．重点对0～5nm，5～20nm，20～100nm及〉100nm4个孔径范围进行了分析，结果表明：在3种试样中，试样A的粒径最大，孔径分布最宽，函数峰值所对应的孔半径及平均孔半径最大；试样B的粒径居中，但是孔径分布最窄，函数峰值所对应的孔半径及平均孔半径最小；粒径最小的试样C，煅烧时可能部分烧结，导致函数峰值所对应的孔半径及平均孔半径比试样B大．在3种试样中，试样B的有效孔径（5～20nm）所占的比例最大，由此预测其脱硫效果最好，选取上述3种粒径石灰石煅烧产物进行脱硫实验，实验结果与预测结果一致．

英文摘要：

In order to find the relationship between the pore structure of CaO from limestone calcination and the desulfurization process, a mathematical model for describing the pore structure was developed, with which pore volume and specific surface area calculated. The calculated results agree well with that of actual measurements. With focus on following 4 pore size ranges： 0-5 nm, 5-20 nm, 20-100 nm and 100 nm above, 3 samples respectively coded as A, B and C were analyzed. Results show that among the 3 samples tested, sample A, whose particle sizes are the largest, has the widest range of pore size distribution, the largest pore size corresponding to the peak value and the largest average pore radius; sample B, whose particle sizes are the medium, has the narrowest range of pore size distribution, the smallest pore size corresponding to the peak value and the smallest average pore radius; sample C, whose particle sizes are the smallest, may be partially sintered, and therefore resulting in larger pore radius corresponding to the peak value and larger average pore radius than sample B. Particles of sample B have the largest proportion of effective radius （5-20 nm） among the 3 samples, and therefore it is believed to have the best desulfurization effect. This assumption has been proved by actual experiments based on CaO with above 3 sizes.