无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ
催化材料

铜-铈/ZSM-5分子筛催化剂制备及脱硝性能研究

  • 苏少龙 ,
  • 曲晓龙 ,
  • 钟读乐 ,
  • 孙彦民 ,
  • 南军 ,
  • 李世鹏
展开
  • 1.中海油天津化工研究设计院有限公司,天津 300131
    2.天津市炼化催化技术工程中心
苏少龙(1989— ),男,硕士,工程师,主要从事脱硫剂的开发;E-mail: 1262075865@qq.com

收稿日期: 2020-09-22

  网络出版日期: 2021-07-08

基金资助

天津市科技计划项目(18YFZCSF01440)

Study on preparation and denitration performance of Cu-Ce/ZSM-5 zeolite catalyst

  • Shaolong Su ,
  • Xiaolong Qu ,
  • Dule Zhong ,
  • Yanmin Sun ,
  • Jun Nan ,
  • Shipeng Li
Expand
  • 1. CenerTech Tianjin Chemical Research and Design Institute Co.,Ltd.,Tianjin 300131,China
    2. Tianjin Refining and Catalytic Technology Engineering Center

Received date: 2020-09-22

  Online published: 2021-07-08

摘要

氮氧化物是大气主要污染源之一,危害人体健康,并引发酸雨。随着环保法规的升级,氮氧化物排放浓度的限值要求越来越高。这要求脱硝工艺尤其是脱硝催化剂必须进一步提高脱硝性能。以ZSM-5分子筛为载体,以铜、铈为活性组分,制备脱硝催化剂活性组分;用铝胶将脱硝催化剂活性组分附着在蜂窝状陶瓷上,得到脱硝催化剂。与ZSM-5分子筛相比,脱硝催化剂活性组分增加了4.73%的铜(以CuO质量分数计)和5.40%的铈(以CeO2质量分数计),比表面积由287.04 m2/g降到275.05 m2/g,孔容、孔径未发生变化,酸性增强,晶型基本保持不变。脱硝催化剂最佳反应条件:反应时间≥60 min,反应温度≥250 ℃,空速≤10 200 h-1。脱硝催化剂在最佳反应条件下的脱硝效率约为85%。脱硝催化剂能适应较低的反应温度,并且具有较高的脱硝效率。

本文引用格式

苏少龙 , 曲晓龙 , 钟读乐 , 孙彦民 , 南军 , 李世鹏 . 铜-铈/ZSM-5分子筛催化剂制备及脱硝性能研究[J]. 无机盐工业, 2021 , 53(6) : 190 -193 . DOI: 10.19964/j.issn.1006-4990.2020-0305

Abstract

Nitrogen oxide is one of the main air pollution sources,which is harmful to human health and causes acid rain. With the upgrading of environmental protection regulations,the limit of NOx emission concentration is becoming lower and lower.It requires the denitration process,especially the denitration catalyst,to further improve the denitration performance. Using ZSM-5 molecular sieve as carrier,copper and cerium as active components,the active components of denitration cata-lyst were prepared.The active components of denitration catalyst were attached to honeycomb ceramics with aluminum glue to obtain denitration catalyst.Compared with ZSM-5 molecular sieve,the active component of denitration catalyst increased by 4.73% of Cu(calculated by the mass fraction of CuO) and 5.40% of Ce(calculated by the mass fraction of CeO2),and the spe-cific surface decreased from 287.04 m2/g to 275.05 m2/g,and the pore volume and the pore size remained unchanged,and the acidity increased,and the crystal form remained basically unchanged.The optimal reaction conditions of denitrification cata-lyst were that reaction time was more than or equal to 60 min,temperature was more than or equal to 250 ℃,and airspeed was less than or equal to 10 200 h-1.The denitration efficiency of the catalyst was about 85% under the optimum reaction conditions.The catalyst could adapt to lower reaction temperature and had higher denitration efficiency.

参考文献

[1] 王昊辰, 王明星, 齐慧敏. SCR法烟气脱硝技术在FCC锅炉中的应用[J]. 当代化工, 2016,45(6):1179-1180,1184.
[2] 陆超, 朱文韬, 郭博闻, 等. 火电厂SCR脱硝催化剂工艺特性评价试验[J]. 电力科技与环保, 2019,35(1):7-9.
[3] 李媛, 谭月, 郭小虎, 等. 氨法脱硫+低温SCR脱硝工艺在焦炉烟气净化中的应用[J]. 能源环境保护, 2019,33(3):34-37.
[4] 郭东旭. 新型铁铈钛催化剂SCR脱硝性能及反应动力学研究[D]. 济南:山东大学, 2013.
[5] 甘丽娜. 低温V2O5-WO3/TiO2脱硝催化剂开发与应用研究[D]. 北京:中国科学院过程工程研究所, 2016.
[6] 金瑞奔. 负载型Mn-Ce系列低温SCR脱硝催化剂制备、反应机理及抗硫性能研究[D]. 杭州:浙江大学, 2010.
[7] 肖雨亭, 吴鹏, 王玲, 等. Ce改性Fe-Mn/TiO2低温SCR脱硝催化剂硫中毒机理[J]. 化工环保, 2019,34(4):431-436.
[8] 刘海岩, 李冬, 苗雪, 等. CuO-WO3/TiO2催化剂制备方法对NH3-SCR脱硝性能的影响[J]. 环境工程, 2020,38(5):89-95.
[9] 束韫, 张凡, 王洪昌, 等. 稻壳基活性炭催化剂的低温NH3-SCR抗硫性能[J]. 中国环境科学, 2019,39(11):4620-4627.
[10] 顾甜, 高凤雨, 唐晓龙. 炭基材料负载型低温NH3-SCR脱硝催化剂的研究进展[J]. 化工进展, 2019,38(5):2329-2338.
[11] Centeno M A, Carrizosa I, Odriozola J A. In situ DRIFTS study of the SCR reaction of NO with NH3 in the presence of O2 over lan-thanide doped V2O5/Al2O3 catalysts[J]. Applied Catalysis B:En-vironmental, 1998,19(1):67-73.
[12] Xie G Y, Liu Z Y, Zhu Z P, et al. Simultaneous removal of SO2 and NOx from flue gas using a CuO/Al2O3 catalyst sorbent:I.Deactiva-tion of SCR activity by SO2 at low temperatures[J]. Jaurnal of Cat-alysis, 2004,224(1):36-41.
[13] Sjövall H, Blint R J, Olsson L. Detailed kinetic modeling of NH3 SCR over Cu-ZSM-5[J]. Applied Catalysis B:Environmental, 2009,92(1/2):138-153.
[14] Kröcher O, Devadas M, Elsener M, et al. Investigation of the selec-tive catalytic reduction of NO by NH3 on Fe-ZSM5 monolith cat-alysts[J]. Applied Catalysis B:Environmental, 2006,66(3/4):208-216.
文章导航

/