催化中国, 中国催化分享 http://blog.sciencenet.cn/u/catachina 化学家(www.chemj.cn)

博文

【天大林法伟】MnO2上CVOCs的臭氧氧化,低温、高效、高选择性、高稳定性

已有 539 次阅读 2021-6-20 12:56 |个人分类:Cl-VOCs 动 态|系统分类:科研笔记

https://www.sciencedirect.com/science/article/abs/pii/S1385894721023998


1.jpg


Highlights


  • •Catalytic ozonation exhibits high CB/DCE conversion over few MnO2 at 120 oC.

  • •O3 significantly enhances Cl-VOCs adsorption and inhibits byproducts formation.

  • •Catalytic ozonation maintains high conversion in long-term tests even with H2O.

  • •Catalytic ozonation relates to acidity, oxygen vacancy and CO2 desorption of MnO2.


Abstract

This paper conducted catalytic ozonation and oxidation of chlorobenzene (CB) and dichloroethane (DCE) over three synthesized MnO2 catalysts with different properties. Catalytic ozonation exhibited high efficiency with less catalyst dosage at low temperature, ca. 30~120 oC, excellent stability, and less byproducts formation for both CB and DCE conversion. MnO2–I exhibited the best performance for all experiments, attributing to its abundant oxygen vacancies, more acid sites, and excellent CO2 desorption properties. Catalytic ozonation exhibited excellent stability with much fewer organic byproducts in effluent gas at 120 oC. H2O had no effect on catalytic ozonation but recovered catalytic oxidation performance. Besides, O3 existence attained high activity over deactivated catalyst by Cl poisoning. In–situ DRIFTs measurements validated facilitated transformation of intermediates during catalytic ozonation. These findings comprehensively verify the superiority of catalytic ozonation to attain highly stable and complete degradation of Cl–VOCs (chlorinated volatile organic compounds) at mild conditions.

image.png



http://wap.sciencenet.cn/blog-3913-1291954.html

上一篇:【浙大翁小乐】NOx-二噁英在VWT催化剂上的协同净化,As的影响
下一篇:【北工大戴洪兴@邓积光】三氯乙烯在Ru/SnO2上的催化氧化,高活性稳定性耐水性、中间物种/副产物确定

0

该博文允许注册用户评论 请点击登录 评论 (0 个评论)

数据加载中...

Archiver|手机版|科学网 ( 京ICP备07017567号-12 )

GMT+8, 2021-8-4 10:30

Powered by ScienceNet.cn

Copyright © 2007- 中国科学报社

返回顶部