| 引用本文： |
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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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| 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） |
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| Preparation of CeTiO2 catalysts with high specific surface area via sol-gel method and removal performance of Hg0 in simulated flue gas |
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QIAO Renjing1,2, XU Qi1, CHEN Kaige1, TANG Zhe1, HAN Fennv1
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| (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 |
