摘要
采用通量箱、比表面积分析仪、扫描电子显微镜和X射线光电子能谱仪测试了电石法聚氯乙烯(PVC)行业中高汞触媒、低汞触媒和废高汞触媒的汞挥发速率、比表面积、成分及汞形态.研究表明:高汞触媒、低汞触媒和废高汞触媒的汞挥发速率分别为1.04×10-7、5.90×10-8和2.47×10-4mg·g-1·min-1.高汞触媒使用后氯化汞被还原为单质汞,且汞吸附于触媒表面,导致废高汞触媒汞挥发速率远高于新汞触媒.
The mercury evaporation rate, specific surface area, catalyst composition, and mercury form of high-, low-, and waste high-mercury catalysts in the acetylene PVC industry were tested by the dynamic flux chamber, specific surface area analyzer, scanning electron microscopy and X-ray photoelectron spectroscopy, respectively. It is shown that the mercury evaporation rates of the high-, low-, and waste high-mercury catalysts are 1.04 x 10^-7, 5.90 x 10^-8, and 2.47 x 10^-4 mg · g^-1 ·min^-1 , respectively. Mercury chlo- ride is reduced to elemental mercury after the high-mercury catalyst is used, and mercury is adsorbed on the surface of the waste mercury catalyst, causing the mercury evaporation rate of the waste high-mercury chloride catalyst much higher than that of the new.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2012年第8期939-942,共4页
Journal of University of Science and Technology Beijing
基金
环境保护部公益资助项目(HBGY200909027)
关键词
触媒
氯化汞
挥发
吸附
汞
catalysts
mercury chloride
evaporation
adsorption
mercury
