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过程工程学报 ›› 2017, Vol. 17 ›› Issue (6): 1208-1216.DOI: 10.12034/j.issn.1009-606X.217141

• 过程与工艺 • 上一篇    下一篇

表面涂覆型低温脱硝催化剂的开发与中试应用

曾 红1,2, 刘平乐1, 张喻升1, 李长明2, 余 剑2*, 许光文2, 高士秋2     

  1. 1. 湘潭大学化工学院,湖南 湘潭 411105;2. 中国科学院过程工程研究所多相复杂系统国家重点实验室,北京 100190
  • 收稿日期:2017-02-20 修回日期:2017-04-07 出版日期:2017-12-20 发布日期:2017-12-05
  • 通讯作者: 余剑 yujian@ipe.ac.cn
  • 基金资助:
    国际合作项目;中国科学院科技服务网络计划;四川省科技计划项目;国家自然科学基金青年项目

Development and Pilot Test of Surface-coating SCR Denitration Catalyst at Low Temperature

Hong ZENG1,2,  Pingle LIU1,  Yusheng ZHANG1,  Changming LI2,  Jian YU2*,  Guangwen XU2,  Shiqiu GAO2     

  1. 1. School of Chemical Engineering, Xiangtan University, Xiangtan , Hunan 411105, China; 2. State Key Lab. Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2017-02-20 Revised:2017-04-07 Online:2017-12-20 Published:2017-12-05
  • Contact: Jian Yu yujian@ipe.ac.cn

摘要: 采用分步浸渍法制备4%V2O5?4%MoO3?5%WO3/TiO2低温粉末脱硝催化剂,将其打浆分散、添加粘结剂制备催化剂浆料,以黏土所制载体为基质制备表面涂覆型蜂窝催化剂. 结果表明,涂层厚度达到110 ?m时,可获得与100%成型蜂窝体相近的脱硝活性,250℃下抗硫抗水中毒稳定性超过100 h,且耐磨性达到应用要求,活性粉末催化剂用量仅为挤出型催化剂的12.8%,显著降低了催化剂成本. 该涂覆型催化剂在10000 Nm3/h烟气量的玻璃窑炉脱硝性能中试中,在入口烟气NOx浓度2800 mg/Nm3、温度240?300℃、空速7150 h?1条件下稳定运行超过1100 h,脱硝率达80%, NH3逃逸量小于3?10?6(?).

关键词: 低温脱硝催化剂, NH3选择催化还原, 玻璃窑炉中试

Abstract: The honeycomb deNOx catalyst was fabricated by coating the 4%V2O5?4%MoO3?5%WO3/TiO2 catalyst slurry on the cheap honeycomb substrate. The results showed that monolithic coating catalyst with thickness of 110 ?m showed nearly the same deNOx activity as the conventional extruded honeycomb catalyst. However, the usage of expensive active components only accounted for 12.8% raw material needed for the extruded catalyst, which significantly decreased the catalyst costs. The catalyst showed extraordinary SO2/H2O-resistant stability at 250℃ during the 100 h discontinuous test with excellent intensity and wearability. The pilot test of the coating catalyst over the flue gas from glass kiln exhibited excellent deNOx performance with above 80% NO conversion rate and less than 3?10?6(?) NH3 escape during the 1100 h stable test under the conditions of 2800 mg/Nm3 inlet NOx concentration, 240?300℃ and 7150 h?1 GHSV.

Key words: denitration catalyst at low temperature, NH3 selective catalytic reduction, pilot test over glass kiln