| 贫燃条件下NO_x选择催化还原催化剂的研究 |
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| 引用本文： | 黄丽华,余林,陈广新,宋一兵,孙长勇,叶飞. 贫燃条件下NO_x选择催化还原催化剂的研究[J]. 汕头大学学报(自然科学版), 2002, 17(4): 29-35 |
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| 作者姓名： | 黄丽华 余林 陈广新 宋一兵 孙长勇 叶飞 |
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| 作者单位： | 汕头大学化学系,汕头,515063 |
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| 基金项目： | 广东省自然科学基金项目(000798);教育部优秀青年教师资助计划项目[2001]39 |
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| 摘 要： | 利用浸渍法制备了四个系列分子筛型催化剂 :Cu/ZSM- 5、 Ag/ZSM- 5、 Cu/SAPO-1 1及 Ag/SAPO- 1 1 ,研究其在贫燃条件下对 C3H6 选择催化还原 NOx的反应性能 ,并通过FT- IR手段对催化剂进行表征 .红外表征显示 Ag/ZSM- 5催化剂中担载的 Ag导致催化剂骨架结构受到一定程度的破坏 .其他三个系列催化剂的实验结果表明 :在加水反应条件下 ,ZSM- 5担载的催化剂在 2 5 0℃时有最佳活性 ,而 SAPO- 1 1担载的催化剂最佳反应温度是35 0℃ .但后者的催化活性比前者好 .7wt% Ag/SAPO- 1 1催化剂对 NO转化率达到 63.2 2 % ,C3H6 转化率达到 1 0 0 % .而 3wt% Cu/ZSM- 5对 NO转化率为 43.43% ,C3H6 转化率为69.81 % .三个系列催化剂反应活性高低如下 :7wt% Ag/SAPO- 1 1 >3wt% Cu/SAPO- 1 1 >3wt% Cu/ZSM- 5 .说明 SAPO- 1 1分子筛有望作为汽车尾气净化催化剂的载体 .
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| 关 键 词： | 贫燃条件 NOx 分子筛 SAPO-11 汽车尾气 |
| 文章编号： | 1001-4217(2002)04-0029-07 |
| 修稿时间： | 2002-06-17 |
Studies on Catalysts with Molecular Sieves as Supporters for Selective Catalystic Reduction of NOX Under Fuel-lean Conditions |
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| Under Fuel-lean ConditionsHuang Lihua Yu Lin Chen Guangxin Song Yibing Sun Changyong Yefei. Studies on Catalysts with Molecular Sieves as Supporters for Selective Catalystic Reduction of NOX Under Fuel-lean Conditions[J]. Journal of Shantou University(Natural Science Edition), 2002, 17(4): 29-35 |
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| Authors: | Under Fuel-lean ConditionsHuang Lihua Yu Lin Chen Guangxin Song Yibing Sun Changyong Yefei |
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| Abstract: | Four series of catalysts with molecular sieves as supporters (namely,Ag/ZSM-5,Cu/ZSM-5,Ag/SAPO-11,and Cu/SAPO-11) are evaluated for their selective catalystic reduction of NO_X with C_3H_6 under fuel-lean conditions.FT-IR characterization has shown that for Ag/ZSM-5 the skeleton structure has been destroyed by the Ag in it.As for the three other series,their catalystic activities decrease in order of Ag/SAPO-11>Cu/SAPO-11>Cu/ZSM-5,indicating that the silicoaluminophosphate SAPO-11 is suitable for use as supporter of automobile exhaust catalyst under fuel-lean conditions |
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| Keywords: | fuel-lean conditions NO_X molecular sieve SAPO-11 automobile exhaust |
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