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CuO-WO3/TiO2催化剂制备方法对NH3-SCR脱硝性能的影响

刘海岩,  李冬,  苗雪,  朱元元,  刘小峰,  吕莹,  李杰,  吴萍霞,  彭悦,  陈建军,  李俊华

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文章导航 > 环境工程  > 2020 >  38(5): 89-95
刘海岩, 李冬, 苗雪, 朱元元, 刘小峰, 吕莹, 李杰, 吴萍霞, 彭悦, 陈建军, 李俊华. 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. doi: 10.13205/j.hjgc.202005016
引用本文: 刘海岩, 李冬, 苗雪, 朱元元, 刘小峰, 吕莹, 李杰, 吴萍霞, 彭悦, 陈建军, 李俊华. 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. doi: 10.13205/j.hjgc.202005016
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LIU Hai-yan, LI Dong, MIAO Xue, ZHU Yuan-yuan, LIU Xiao-feng, LV Ying, LI Jie, WU Ping-xia, PENG Yue, CHEN Jian-jun, LI Jun-hua. EFFECT OF PREPARATION METHODS OF CuO-WO3/TiO2 CATALYSTS ON NH3-SCR DENITRATION ACTIVITY[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(5): 89-95. doi: 10.13205/j.hjgc.202005016
Citation: LIU Hai-yan, LI Dong, MIAO Xue, ZHU Yuan-yuan, LIU Xiao-feng, LV Ying, LI Jie, WU Ping-xia, PENG Yue, CHEN Jian-jun, LI Jun-hua. EFFECT OF PREPARATION METHODS OF CuO-WO3/TiO2 CATALYSTS ON NH3-SCR DENITRATION ACTIVITY[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(5): 89-95. doi: 10.13205/j.hjgc.202005016
shu

CuO-WO3/TiO2催化剂制备方法对NH3-SCR脱硝性能的影响

doi: 10.13205/j.hjgc.202005016

  • 1. 清华大学盐城环境工程技术研发中心, 江苏 盐城 224000;

  • 2. 清华大学 烟气多污染物控制技术与装备国家工程实验室, 北京 100084

基金项目: 

国家自然科学基金项目(21876093)。

国家重点研发计划项目(2016YFC02092020,2018YFC0213400,2017YFC0210700)

详细信息
    作者简介:

    刘海岩(1988-),女,硕士,主要研究方向为新型催化材料和催化剂开发。996542071@qq.com

    通讯作者:

    陈建军(1981-),男,博士,副研究员,主要研究方向为烟气中低温脱硝技术和高效加氢脱硫技术。chenjianjun@tsinghua.edu.cn

EFFECT OF PREPARATION METHODS OF CuO-WO3/TiO2 CATALYSTS ON NH3-SCR DENITRATION ACTIVITY

  • 1. Tsinghua-Yancheng Environmental Engineering Technology Research and Development Center, Yancheng 224000, China;

  • 2. National Engineering Laboratory for Flue Gas Pollutants Control Technology and Equipment, Tsinghua University, Beijing 100084, China

    摘要
  • 摘要: 分别采用溶胶-凝胶法和浸渍法制备xCuO-yWO3/TiO2催化剂(x,y分别代表样品中ω(CuO)和ω(WO3)),并在微型固定床反应器中对制备的xCuO-yWO3/TiO2催化剂进行选择性催化还原脱硝(NH3-SCR)性能评价。结果表明:采用溶胶-凝胶法制备的2CuO-6WO3/TiO2催化剂具有较好的脱硝性能,在250~350 ℃,NOx转化率达到90%以上,相较于浸渍法制备的2CuO-6WO3/TiO2催化剂活性明显提高。并采用BET、XRD、H2-TPR、NH3-TPD和XPS等表征手段对制备的催化剂进一步表征分析,结果表明:通过溶胶-凝胶法制备2CuO-6WO3/TiO2催化剂的比表面积和表面化学吸附氧明显提高,且还原能力和酸性增强,对NH3的吸附能力亦有所提高,因此溶胶-凝胶法制备的2CuO-6WO3/TiO2催化剂表现出较好的NH3-SCR脱硝性能。
    Abstract: xCuO-yWO3/TiO2 catalysts (x and y represent the mass fraction of CuO and WO3 in the sample, respectively) were prepared by sol-gel method and impregnation method, respectively, and the SCR denitration performance (NH3-SCR) of the catalysts was evaluated in a miniature fixed-bed quartz reactor. It was found that the 2CuO-6WO3/TiO2 catalyst by the sol-gel method had good denitration performance, and made NOx conversion rate over 90% in temperature range of 250~350 ℃, which activity was improved significantly compared with 2CuO-6WO3/TiO2 catalyst by impregnation method. The prepared catalysts were characterized by BET, XRD, H2-TPR, NH3-TPD and XPS. The results showed that for the 2CuO-6WO3/TiO2 catalyst prepared by sol-gel method, the specific surface area, the surface adsorbed oxygen, the redox potential and adsorption capacity of NH3 increased significantly than the catalyst prepared by the impregnation method. Therefore, the 2CuO-6WO3/TiO2 catalyst prepared by sol-gel method exhibited excellent NH3-SCR activity and high N2 selectivity.
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  • 收稿日期:  2019-10-10

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