钴改性MCM-41催化剂脱除烟气中单质汞特性  

Removal of Elemental Mercury from Flue Gas by Cobalt Modified MCM-41

作　　者：牛朝蓬 路好[1] 郑雯雯[1] 刘永振[1] 邢微波 张安超[1] 

机构地区：[1]河南理工大学机械与动力工程学院,河南焦作454003 [2]山西兴能发电有限责任公司,山西古交030206

出　　处：《能源研究与管理》2016年第2期23-28,共6页Energy Research and Management

基　　金：国家自然科学基金项目(51306046);煤燃烧国家重点实验室开放基金项目(FSKLCC1108);河南省自然科学基金项目(12A470003);河南理工大学青年骨干教师项目(YBT2013004)

摘　　要：以在线测汞仪为检测手段,在固定床实验台架上利用钴(Co)改性MCM-41介孔分子筛催化剂开展了单质汞(Hg0)的脱除研究;采用N2吸附/脱附、透射电子显微镜、X-射线衍射、X-射线光电子能谱和H2-程序升温还原等手段对催化剂进行物理化学性质表征。结果表明负载Co后,催化剂的比表面积、微孔容积和总孔容积均出现不同程度的降低;Co负载量低于5%时,其分散度较高;随着Co负载量的增加,Co3O4的特征衍射峰越来越明显。随着Co负载量的增加,Co改性MCM-41催化剂对Hg0的脱除效率先增加后减小,其最佳负载量约为7.5%。The experimental study on the removal of elemental mercury（Hg0） was carried out by cobalt modified MCM-41 mesoporous molecular sieve in a laboratory-scale fixed-bed reactor. An online mercury analyzer was applied to detect the inlet and outlet Hg0 concentrations. The catalysts were characterized by a variety of techniques such as nitrogen adsorption/desorption, transmission electron microscopy（TEM）, X-ray diffraction（XRD）, X-ray photoelectron spectra（XPS）and hydrogen temperature-programmed reduction（H2-TPR）. The results showed that the BET surface areas, micropore volumes, and total volume of the MCM-41 mesoporous molecular sieve decreased due to the presence of cobalt oxide. The cobalt oxide was highly dispersed on the surface of MCM-41 when its content was below 5%. However, the characteristic diffraction peaks of Co3O4 became clear with the content of cobalt oxide increasing. The Hg0 removal efficiency of cobalt modified MCM-41 catalyst first increased, then decreased with increasing the content of cobalt oxide, and the optimal loading of cobalt oxide was about 7.5%.

关 键 词：钴 MCM-41 介孔分子筛 脱汞 

分 类 号：TK411[动力工程及工程热物理—动力机械及工程]