《环境工程学报》第三届编委会2019年度工作会议顺利召开    《环境工程学报》获“2017年度科学传播特殊贡献单位”荣誉称号    《环境工程学报》启用DOI通知设为首页|加入收藏
引用本文
  • 官建敏,李徐,汪远.失活商业SCR催化剂在线维护技术[J].环境工程学报,2019,13(7):1678-1686.DOI:10.12030/j.cjee.201811085    [点击复制]
  • GUAN Jianmin,LI Xu,WANG Yuan.On-line maintenance technology of deactivated commercial SCR catalyst[J].,2019,13(7):1678-1686.DOI:10.12030/j.cjee.201811085   [点击复制]
【打印本页】 【在线阅读全文】【下载PDF全文】 查看/发表评论下载PDF阅读器关闭

←前一篇|后一篇→

过刊浏览    高级检索

本文已被:浏览 44次   下载 40 本文二维码信息
码上扫一扫!
失活商业SCR催化剂在线维护技术
官建敏,李徐,汪远
0
(武汉大学资源与环境科学学院,武汉 430079)
摘要:
商业SCR催化剂在工业运行过程中由于其复杂的工况条件存在容易中毒、失活的问题,故利用在线维护技术对其进行活性恢复具有巨大的商业发展前景。为了探究泡沫清洗技术对商业SCR失活催化剂进行在线维护方案的可行性,采用一系列表征手段对在线维护前、后的失活SCR脱硝催化剂进行了表征分析,包括SEM、EDS、XRD、BET和XPS等,并对在线维护最佳的溶液浓度参数进行了探究。研究发现:当稀硫酸浓度为0.4 mol·L-1,微孔渗透液质量分数为2%,活性添加剂质量分数为3%,在线维护效果最优;经过在线维护之后,催化剂团聚现象得到明显改善,碱金属中毒现象得到缓解,催化剂氧化性能和表面酸度增强,催化剂活性因而得到恢复,其最佳脱硝效率可达92%,具备良好的工业应用潜力。
关键词:  脱硝  SCR催化剂  在线维护  最优条件
DOI:10.12030/j.cjee.201811085
投稿时间:2018-11-13
基金项目:南方电网科技项目K-GD2012-360南方电网科技项目(K-GD2012-360)
On-line maintenance technology of deactivated commercial SCR catalyst
GUAN Jianmin,LI Xu,WANG Yuan
(School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China)
Abstract:
Due to the complicated working conditions for commercial SCR catalysts applied in bio-fuel plants, they must meet the poisoning and deactivation problems during the process of industrial operation. Therefore, their activation recovery with viable online maintenance solutions will have a great commercial potential. In order to identify the feasibility of the foam cleaning technology on the on-line maintenance of deactivated commercial SCR catalysts, a series of techniques, including SEM, EDS, XRD, BET and XPS, were used to characterize the deactivated commercial SCR catalysts before and after on-line maintenance. The optimum concentration parameters of cleaning solution for on-line maintenance were also investigated. The results showed that the optimum on-line maintenance effect happened at the dilute sulfuric acid concentration of 0.4 mg·L-1, the mass concentration for microporous permeate of 2%, and the mass concentration for active additive of 3%. After on-line maintenance, the agglomeration and alkali poisoning of the catalysts were significantly alleviated. The surface acidic sites and oxidation property of catalyst were enhanced, which contributed to the activity recovery of deactivated catalyst. The optimum denitration efficiency reached up to 92%, which showed a good industrial application potential.
Key words:  denitrification  SCR catalyst  on-line maintenance  optimal conditions