氯化汞触媒的汞挥发速率  

Mercury evaporation rate of mercury chloride catalysts

作　　者：田祎[1,2,3] 邢奕[1] 刘景洋[2] 菅小东[3] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中国环境科学研究院清洁生产与循环经济研究中心,北京100012 [3]环境保护部化学品登记中心,北京100012

出　　处：《北京科技大学学报》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)

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.

关 键 词：触媒 氯化汞 挥发 吸附 汞 

分 类 号：X501[环境科学与工程—环境工程]