Chemical Industry and Engineering Progress ›› 2018, Vol. 37 ›› Issue (06): 2242-2248.DOI: 10.16085/j.issn.1000-6613.2017-1581

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DeNOx performance and resistance to H2O and SO2 of Mn-Ce doped V-W/Ti catalyst at middle-low temperature

HUANG Jin1, ZHONG Zhaoping1, ZHU Lin1, XUE Jianming2, XU Yueyang2, WU Peiting3   

  1. 1 Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu, China;
    2 Guodian Science and Technology Research Institute, Nanjing 210096, Jiangsu, China;
    3 Suqian Longking EcoTech Company Limited, Suqian 2223800, Jiangsu, China
  • Received:2017-07-31 Revised:2017-11-28 Online:2018-06-05 Published:2018-06-05

锰铈改性钒钨钛中低温SCR催化剂脱硝及抗水抗硫性能

黄金1, 仲兆平1, 朱林1, 薛建明2, 许月阳2, 吴培亭3   

  1. 1 东南大学能源与环境学院, 能源热转换及其过程测控教育部重点实验室, 江苏 南京 210096;
    2 国电科学技术研究院, 江苏 南京 210096;
    3 宿迁龙净环保科技有限公司, 江苏 宿迁 223800
  • 通讯作者: 仲兆平,教授,研究方向为生物质能利用和能源环境工程。
  • 作者简介:黄金(1993-),男,硕士研究生。
  • 基金资助:
    江苏省政策引导类计划(产学研合作)项目(BY2015070-21)。

Abstract: Due to the selective catalytic reduction(SCR)activities of Mn at low temperature and the oxygen storage capacity of Ce,Mn and Ce were introduced into V-W/Ti. Eight catalyst samples were prepared by the impregnation method. The experiments of deNOx and resistance to H2O and SO2 for the catalysts were conducted with ammonia gas as the reductant in a fixed-bed stainless steel reactor. The properties of different catalysts were characterized by NH3-TPD,H2-TPR,N2-physisorption,and XRD. The 3V-10W-7.7Mn-4.3Ce/75Ti catalyst sample showed satisfactory performance at 240℃ with NO removal efficiency>95% at 180-330℃ and 80% remaining in H2O and SO2 at 240℃. It possesses substantial strong acid sites that enhances the adsorption capacity for NH3 due to the 7.7% MnO2,and moderate Ce also promotes its low-temperature redox capacity. MnO2 and CeO2 can highly be dispersed on the surface of TiO2 although the BET surface area of 3V-10W-7.7Mn-4.3Ce/75Ti is close to 67m2/g.

Key words: selective catalytic reduction, catalyst, Mn-Ce, V-W/Ti, middle-low temperature, resistance to H2O and SO2

摘要: 结合Mn的低温脱硝活性与Ce的储氧能力,将Mn-Ce作为整体改性剂,添加到传统钒钨钛催化剂中,用浸渍法制备了8份样品,以NH3为还原剂,于管式固定反应器内进行脱硝及抗水抗硫实验,通过NH3-TPD、H2-TPR、N2物理吸附测试、XRD手段对样品进行表征。综合脱硝活性及240℃抗水抗硫测试结果,选出较优的改性催化剂为3V-10W-7.7Mn-4.3Ce/75Ti,其在180~330℃保持脱硝活性95%以上,240℃抗水抗硫活性稳定在80%左右。该样品的比表面积虽然不到67m2/g,但是MnO2与CeO2高度分散在TiO2表面;7.7%含量的MnO2也使催化剂具有大量的强酸位点,能够增强对NH3的吸附;适当含量的Ce也增强了催化剂的低温氧化还原能力。

关键词: 选择催化还原, 催化剂, 锰铈, 钒钨钛, 中低温, 抗水抗硫

CLC Number: 

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