Dissolution rate of limestone for wet flue gas desulfurization in the presence of sulfite.
Dissolution rate of limestone for wet flue gas desulfurization in the presence of sulfite.
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DOI：
10.1016/j.jhazmat.2009.02.156
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发表时间：
2009-09
影响因子：
13.6
通讯作者：
Gao Xiang;Guo Rui-tang;Ding Hong-lei;Luo Zhong-yang;Cen Ke-fa
中科院分区：
文献类型：
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作者：
Gao Xiang;Guo Rui-tang;Ding Hong-lei;Luo Zhong-yang;Cen Ke-fa
石灰石的溶解速率是通过pH-静态法与CO2鼓泡和溶解的亚硫酸盐测量。在此条件下，石灰石的溶解速率受传质和表面动力学控制。结果表明，在亚硫酸盐存在下，石灰石的溶解速率随搅拌速度、反应温度和CO2分压的增加而增加。石灰石的结晶度对溶解速率有很大的影响，结晶度越低，溶解速率越大。当pH值低于5.5时，亚硫酸盐的存在促进溶出速率，当pH值高于5.5时，亚硫酸盐的存在抑制溶出速率。
Limestone dissolution rate was measured by a pH-stat method with CO2sparging and dissolved sulfite. The dissolution rate of limestone under these conditions was found to be controlled by mass transfer and surface kinetics. As can be seen from the results, in the presence of sulfite, limestone dissolution rate increases with increasing stirring speed, reaction temperature and CO2partial pressure. The crystallinity of limestone has a great impact on the dissolution rate: The lower the value of the crystallinity of limestone is, the higher the dissolution rate is. The presence of sulfite promotes the dissolution rate when pH value is below 5.5 but inhibits it when pH value is above 5.5.