| 丙烷催化还原脱硝中硫中毒Cu-Ir/H-ZSM-5催化剂的再生 |
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| 引用本文： | 潘华,建艳飞,郭玉慧,陈宁娜,何炽. 丙烷催化还原脱硝中硫中毒Cu-Ir/H-ZSM-5催化剂的再生[J]. 中国环境科学, 2016, 36(5): 1360-1365 |
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| 作者姓名： | 潘华 建艳飞 郭玉慧 陈宁娜 何炽 |
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| 作者单位： | 1. 西安交通大学环境科学与工程系, 陕西 西安 710049;2. 中国科学院地球环境研究所气溶胶化学与物理院重点实验室, 陕西 西安 710075 |
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| 基金项目： | 国家自然科学基金资助项目(21006093和21477095);陕西省自然科学基金资助项目(2014JQ2-2009);中央高校基本科研业务费专项资金资助(2015gjhz10) |
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| 摘 要： | 考察了5%H2/Ar还原再生丙烷催化还原NOx中硫中毒Cu-Ir/H-ZSM-5催化剂的工艺参数影响,采用N2吸附、X射线衍射、X射线光电子能谱和氢气程序升温还原等手段研究了催化剂再生行为的构效关系.结果表明,硫中毒Cu-Ir/H-ZSM-5催化剂由于CuSO4的生成导致催化剂活性位损失,比表面积、微孔面积和孔体积的减小.H2还原再生的最佳工艺参数为再生温度500℃和再生气体用量42.8L/g催化剂,再生催化剂的活性可恢复到新鲜催化剂的95%.在最佳再生条件(500℃和42.857L/g催化剂)下,再生催化剂表面CuSO4含量最低(0.4%),且再生催化剂的比表面积、微孔面积和孔体积较失活催化剂有较大提高.
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| 关 键 词： | Cu-Ir/H-ZSM-5催化剂 H2还原再生 硫中毒 丙烷催化还原氮氧化物 |
| 收稿时间： | 2015-11-06 |
Regeneration of sulfur poisoning Cu-Ir/H-ZSM-5catalyst in catalytic reduction of NOx with propane by H2 reduction |
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| PAN Hua,JIAN Yan-fei,GUO Yu-hui,CHEN Ning-na,HE Chi. Regeneration of sulfur poisoning Cu-Ir/H-ZSM-5catalyst in catalytic reduction of NOx with propane by H2 reduction[J]. China Environmental Science, 2016, 36(5): 1360-1365 |
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| Authors: | PAN Hua JIAN Yan-fei GUO Yu-hui CHEN Ning-na HE Chi |
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| Affiliation: | 1. Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China;2. Key Lab of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China |
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| Abstract: | Effect of regeneration parameters of H2 reduction on sulfur poisoning Cu-Ir/H-ZSM-5catalyst for catalytic reduction of NOx with propane (C3H8-SCR) was investigated. The regeneration behavior was carried out by N2 adsorption, X-ray diffraction (XRD), X-ray photoelectron spectrometer (XPS) and hydrogen temperature-programmed reduction (H2-TPR). Deactivation of Cu-Ir/H-ZSM-5was caused by the formation of CuSO4, resulting in the loss of the active sites, decrease of the surface area, microspore area and pore volume of catalyst. The temperature of 500℃ and regeneration gas consumption of 42.8L/gcatalyst were the best regeneration condition for H2 reduction, because of the lowest content (0.4%) of CuSO4 on Cu-Ir/H-ZSM-5catalyst. The activity of Cu-Ir/H-ZSM-5catalyst regenerated could be returned to 95% of the fresh catalyst. The increase of the surface area, microspore area, and pore volume of catalyst was obtained by H2 reduction. |
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| Keywords: | Cu-Ir/H-ZSM-5catalyst H2 reduction regeneration sulfur poisoning catalytic reduction by C3H8 |
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