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现代化工  2020, Vol. 40 Issue (5): 122-127    DOI: 10.16606/j.cnki.issn0253-4320.2020.05.028
  科研与开发 本期目录 | 过刊浏览 | 高级检索 |
Cu负载量及改性对Cu/SAPO-34催化剂NH3-SCR性能的影响
胡宜康, 徐斌, 曹智焜, 毛静雯
河南科技大学车辆与交通工程学院, 河南 洛阳 471003
Effect of Cu loading amount and modification on NH3-SCR performance of Cu/SAPO-34 catalysts
HU Yi-kang, XU Bin, CAO Zhi-kun, MAO Jing-wen
School of Vehicle and Transportation Engineering, Henan University of Science and Technology, Luoyang 471003, China
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摘要 通过浸渍法制备了不同负载量的Cu/SAPO-34和Cu-Ce/SAPO-34催化剂,探究Cu、Ce负载量对催化剂性能的影响。结果表明,4%负载量的Cu/SAPO-34催化剂表现出优异的NH3-SCR性能,在231~586℃时转化率均达到80%以上,最高脱硝效率达到98.79%。通过共负载过渡金属Cu和Ce元素,提高了催化剂的中低温NH3-SCR性能,拓宽了催化剂活性温度窗口。XRD、H2-TPR、NH3-TPD表征结果表明,掺杂Ce元素可以抑制CuO生成,同时可以促进活性较高的Cu2+生成。增加Cu负载量可以提高Cu/SAPO-34催化剂酸性位的数量,Ce元素的掺杂占据分子筛载体的B酸性位,造成催化剂的中强度酸性位数量减少,Cu/Ce物质的量的比为4:5时最佳。
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胡宜康
徐斌
曹智焜
毛静雯
关键词:  Cu/SAPO-34  Cu-Ce/SAPO-34  负载量  NH3-SCR  浸渍法    
Abstract: A series of Cu/SAPO-34 and Cu-Ce/SAPO-34 catalysts with different loadings are prepared by impregnation method.The effects of Cu and Ce loadings on the performance of the catalysts are investigated.Experimental results show that Cu/SAPO-34 catalyst with a 4% of loadings has excellent NH3-SCR performance,over which the conversion efficiency can exceed 80% in the temperature range of 231-586℃,and the highest denitration efficiency reaches 98.79%.By co-loading transition metals Cu and Ce,the performance of the catalyst in medium-low temperature NH3-SCR is improved,and the activity temperature window of the catalyst is broadened.XRD and H2-TPR characterization shows that Ce doping can inhibit the formation of CuO and promote the formation of Cu2+ with higher activity.NH3-TPD characterization shows that higher Cu loadings can increase the number of acid sites of Cu/SAPO-34 catalyst.Ce doping may occupy B acid position of the molecular sieve carrier,resulting in a decrease in the number of medium-strength acid sites of the catalyst.Therefore the optimum doping amount of Cu/Ce is 4:5.
Key words:  Cu/SAPO-34    Cu-Ce/SAPO-34    loading amount    NH3-SCR    impregnation method
收稿日期:  2019-07-21      修回日期:  2020-03-07          
ZTFLH:  TQ032  
基金资助: 国家重点研发计划(2016YFD0700701-02)
通讯作者:  徐斌(1964-),男,博士,教授,博士生导师,研究方向为清洁代用燃料燃烧技术及微动力系统的开发与研究,通讯联系人,xu64327@163.com。    E-mail:  xu64327@163.com
作者简介:  胡宜康(1993-),男,硕士研究生,研究方向为柴油机尾气后处理,1328845950@qq.com
引用本文:    
胡宜康, 徐斌, 曹智焜, 毛静雯. Cu负载量及改性对Cu/SAPO-34催化剂NH3-SCR性能的影响[J]. 现代化工, 2020, 40(5): 122-127.
HU Yi-kang, XU Bin, CAO Zhi-kun, MAO Jing-wen. Effect of Cu loading amount and modification on NH3-SCR performance of Cu/SAPO-34 catalysts. Modern Chemical Industry, 2020, 40(5): 122-127.
链接本文:  
https://www.xdhg.com.cn/CN/10.16606/j.cnki.issn0253-4320.2020.05.028  或          https://www.xdhg.com.cn/CN/Y2020/V40/I5/122
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