摘要
介绍了钙基脱硫剂固硫后形成的 Ca O-Ca SO4 固体混合物中钙和硫酸根的测定方法。改进了文献中微量硫酸根的滴定分析 ,分析了滴定过程的机理。先用高氯酸将固体混合物溶解形成水溶液 ,然后以钍试剂为指示剂 ,用高氯酸钡溶液滴定溶液中的微量硫酸根 ,并用 EDTA法以钙红为指示剂滴定溶液中的钙离子 ,从而可以计算出钙基脱硫剂的固硫率 (表示为脱硫后固体混合物中的钙硫化 )。
A method for analyzing the contents of Ca & S in solid mixture of calcium based sorbents after desulfurization was provided.The analytical procedure of law concentration sulfate was improved,and its detailed mechanism was explored.The dissolution of solid samples is enhanced by adding small amount of perchloric acid.In the solution,low concentration sulfate ions was determined by a direct titration with barium perchlorate as titrant and thorin as the indicator;the concentration of calcium ions was determined by a direct EDTA titration using Calcon carboxylic acid sodium salt as the indicator.The SO 2 capture effciency could be calculated from the above results which was expressed as Ca/S ratio in the sulfated samples.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2000年第4期44-46,共3页
Environmental Pollution & Control
