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| SO2对Mn-Cu-Ce/TiO2低温选择催化还原NO的影响 | |
| 引用本文： | 伍斌,黄妍,郑毅,童志权.SO2对Mn-Cu-Ce/TiO2低温选择催化还原NO的影响[J].环境科学学报,2008,28(5):960-964. |
| 作者姓名： | 伍斌 黄妍 郑毅 童志权 |
| 作者单位： | 1. 攀枝花学院生物与化学工程学院,攀枝花,617000;湘潭大学环境工程系,湘潭,411105 2. 湘潭大学环境工程系,湘潭,411105 3. 攀枝花学院生物与化学工程学院,攀枝花,617000 |
| 摘 要： | 研究了SO2对Mn-Cu-Ce/TiO2选择催化还原 NO 的影响,并采用傅立叶变换红外光谱、x射线衍射光谱及暂态响应技术对Mn-Cu-Ce/TiO2催化剂的SO2中毒机理进行了探讨.结果表明,SO2 可强吸附在Mn-Cu-Ce/TiO2表面的 CuO 活性位上.并生成 CuSO4,由于 CuSO4 在低温时对SCR 反应有抑制作用,因而,催化剂的活性下降;暂态响应实验结果表明,Mn-Cu-Ce/TiO2催化剂上的SCR反应主要遵循 Langmuir-Hinshelwood机理.通过对催化剂进行硫酸化或 NO 预吸附,可以消除SO2对 Mn-Cu-Ce/TiO2的毒害作用. |
| 关 键 词： | 二氧化硫 氧化氮 低温选择性催化还原 锰 铜 铈 二氧化钛 暂态响应 |
| 文章编号： | 0253-2468(2008)05-960-05 |
| 收稿时间： | 2007/3/18 0:00:00 |
| 修稿时间： | 2007年3月18日 |
Effect of SO2 on selective catalytic reduction of NO over Mn-Cu-Ce/TiO2 at low temperature |
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| WU Bin,HUANG Yan,ZHENG Yi and TONG Zhiquan.Effect of SO2 on selective catalytic reduction of NO over Mn-Cu-Ce/TiO2 at low temperature[J].Acta Scientiae Circumstantiae,2008,28(5):960-964. | |
| Authors: | WU Bin HUANG Yan ZHENG Yi and TONG Zhiquan |
| Institution: | 1. Department of Biology & Chemical Engineering, Panzhihua College, Panzhihua 617000; 2. Department of Environmental Engineering, Xiangtan University, Xiangtan 411105,Department of Environmental Engineering, Xiangtan University, Xiangtan 411105,Department of Biology & Chemical Engineering, Panzhihua College, Panzhihua 617000 and Department of Environmental Engineering, Xiangtan University, Xiangtan 411105 |
| Abstract: | The effect of SO2 on the selective catalytic reduction(SCR) of NOwith NH3 over a Mn-Cu-Ce/TiO2 catalyst and its mechanism were investigated by Fourier transform infrared spectroscopy,X-ray diffraction and transient response experiments.SO2 is strongly absorbed on Mn-Cu-Ce/TiO2 at the CuO active sites.The absorbed SO2 will react with CuO to form CuSO4,which will inhibit SCRat low temperature.Transient response experiments suggested that SCR over Mn-Cu-Ce/TiO2 follows the Langmuir-Hinshelwood mechanism.The effect of SO2 on Mn-Cu-Ce/TiO2 could be alleviated by sulphurating the catalyst or pre-absorbing NO on the catalyst. |
| Keywords: | sulfur dioxide nitrogen oxide selective catalytic reduction at low temperature copper manganese cerium titania transient response |
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