【摘要】 采用热重分析仪和压汞仪对4种贝壳和一种石灰石在不同反应条件下的脱硫性能和孔结构进行了试验研究。随SO2浓度的增加、反应时间的增加,贝壳与石灰石的钙转化率增加。贝壳的脱硫效果优于石灰石,其最佳脱硫温度比石灰石的高:扇贝壳的约为1050℃,海螺和毛蚶壳约为1000℃,花蛤约为950℃,而石灰石的约为900℃。煅烧贝壳的内部孔径在0.2-10gm之间,比表面积在0.6459-1.1389 m2/g,而石灰型CaO的孔径集中在0.02-0.1μm,比表面积为12.2209 m2/g。孔分布良好的贝壳具有较好的脱硫动力学特性,脱硫剂的钙转化率较高。更多还原

【Abstract】 The experimental study on the desulphurization performance and pore structure of four shells and one limestone has been done under various conditions by means of thermal-gravimetric analysis (TGA) and pore analyzer. The calcium conversion ratio of shells and limestone are increasing with the increase of SO2 concentration and the extending of reaction time. The desulphurization effects of the shell are better than that of the limestone and the optimal temperatures are also higher than that of the limestone. At the test condition, the optimal temperatures of the scallop shell and the clam shell are about 1050℃ and 950℃ respectively, those of the trumpet shell and the ark shell are about 950℃, while that of the limestone is 900℃ or so. The inside pore diameter of the calcining shell is between 0.2-10μm, the surface area is 0.6459-1.1389 m2/g, whereas that of the limestone is between 0.02 to 0.1μm, and the surface area is 12.2209 m2/g. With the better pore structure, the shells, especially the scallop shell, have better desulphurization kinetics characteristics and higher calcium conversion ratio.更多还原