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  • 乔仁静,许琦,陈凯歌,唐喆,韩粉女.溶胶-凝胶法制备高比表面积CeO2-TiO2催化剂及其在模拟烟气中脱除Hg0的性能[J].环境工程学报,2017,11(10):5535-5542.DOI:10.12030/j.cjee.201612123    [点击复制]
  • QIAO Renjing,XU Qi,CHEN Kaige,TANG Zhe,HAN Fennv.Preparation of CeTiO2 catalysts with high specific surface area via sol-gel method and removal performance of Hg0 in simulated flue gas[J].,2017,11(10):5535-5542.DOI:10.12030/j.cjee.201612123   [点击复制]
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溶胶-凝胶法制备高比表面积CeO2-TiO2催化剂及其在模拟烟气中脱除Hg0的性能
乔仁静1,2, 许琦1, 陈凯歌1, 唐喆1, 韩粉女1
0
(1. 盐城工学院化学与生物工程学院, 盐城 224051;2. 江苏大学化学化工学院, 镇江 212013)
摘要:
以CeO2作为活性组分、TiO2作为载体,并以十六烷基三甲基溴化铵(CTAB)为模板剂,采用溶胶-凝胶法制备出高比表面积CeO2-TiO2催化剂,通过XRD、BET、SEM和TEM对CeO2-TiO2催化剂进行表征,并研究了其在模拟燃煤烟气中Hg0的氧化性能。结果表明:当反应温度为250 ℃时,通入4% O2、0.001% HCl、0.03% NO以及0.04% SO2后,CeO2(0.4)-TiO2催化剂的Hg0氧化率最高为85%;烟气中的O2、HCl和NO均能促进CeO2(0.4)-TiO2催化剂对Hg0的氧化,当反应温度250 ℃时,通入4% O2和0.001%~0.003% HCl,Hg0氧化率稳定在98%左右,而通入4% O2和0.03% NO后,Hg0氧化率也能达到53%;在抗硫实验中,当仅通入0.04% SO2,Hg0氧化率仅有5%。当0.04% SO2中添加4% O2时,CeO2(0.4)-TiO2催化剂的Hg0氧化率提高至62%。
关键词:  溶胶-凝胶法  CeO2-TiO2催化剂  Hg0氧化率
DOI:10.12030/j.cjee.201612123
投稿时间:2016-12-18修订日期:2016-03-07
基金项目:江苏省科技计划项目(BY2015057-37);江苏省生态建材与环保装备协同创新中心联合研究基金资助项目(GX20151-1)
Preparation of CeTiO2 catalysts with high specific surface area via sol-gel method and removal performance of Hg0 in simulated flue gas
QIAO Renjing1,2, XU Qi1, CHEN Kaige1, TANG Zhe1, HAN Fennv1
(1. School of Chemical and Biological Engineering, Yancheng Institute of Technology, Yancheng 224051, China;2. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China)
Abstract:
CeO2-TiO2 catalysts with high specific surface area were synthesized by sol-gel method, in which CeO2 was used as active phase, TiO2was used as carrier, cationic surfactant cetyl trimethyl ammonium bromide (CTAB) was used as template. X-ray diffraction (XRD), N2 adsorption-desorption (BET), scanning electron microscopy (SEM), transmission electron microscopy (TEM) were used for the characterization of CeO2-TiO2 catalysts, and studied the oxidation property of Hg0 in simulated coal combustion flue gas. The results showed that, when 4% O2, 0.001% HCl, 0.03% NO and 0.04%SO2 was added to the fuel gas, the Hg0 oxidation efficiency of CeO2(0.4)-TiO2 catalysts were the highest 85% at 250℃. It was also found that O2, HCl and NO could facilitate the Hg0oxidation of CeO2(0.4)-TiO2 catalysts. When the reaction temperature was 250℃, 4% O2 and 0.001%-0.003%ppm HCl was added to the fuel gas, Hg0 oxidation efficiency kept about 98%, 4% O2 and 0.03% NO was added to the fuel gas, Hg0 oxidation efficiency reached 53%. The sulfur tolerance of CeO2(0.4)-TiO2 catalysts showed that in the absence of O2, Hg0 oxidation efficiency of CeO2(0.4)-TiO2 catalysts were declined to 5% under 0.04% SO2.When adding 4% O2 in 0.04% SO2, the Hg0 oxidation efficiency of CeO2(0.4)-TiO2 catalysts improved to 62%.
Key words:  sol-gel method  CeO2-TiO2 catalysts  Hg0 oxidation efficiency