大连理工大学  登录  English 
张国权
点赞:

副教授   博士生导师   硕士生导师

主要任职: 无

性别: 男

毕业院校: 大连理工大学

学位: 博士

在职信息:在职

所在单位: 环境学院

电子邮箱:

办公地点 :

手机版

访问量:

开通时间 : ..

最后更新时间: ..

当前位置: 中文主页 >> 科学研究 >> 论文成果
Insights into Mechanism of Catalytic Ozonation over Practicable Mesoporous Mn-CeOx/gamma-Al2O3 Catalysts

点击量:

论文类型: 期刊论文

第一作者: Wu, Zongwei

通讯作者: Zhang, GQ (reprint author), Dalian Univ Technol, Key Lab Ind Ecol & Environm Engn, Minist Educ, Linggong Rd 2, Dalian 116024, Peoples R China.

合写作者: Zhang, Guoquan,Zhang, Ruoyu,Yang, Fenglin

发表时间: 2018-02-14

发表刊物: INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录刊物: SCIE、EI、Scopus

卷号: 57

期号: 6

页面范围: 1943-1953

ISSN号: 0888-5885

摘要: The practicable mesoporous gamma-Al2O3-supported manganese-cerium mixed oxides (Mn-CeOx/gamma-Al2O3) catalysts were prepared in large quantities by a- facile impregnation-calcination method. Characterization results demonstrated that the Mn-CeOx/gamma-Al2O3 catalyst retained the mesoporous structure of gamma-Al2O3 and existed in multivalence redox couples of Mn4+/3+ and Ce4+/3+. The surface property, catalytic performance, reaction kinetics, and mechanism of gamma-Al2O3 and Mn-CeOx/gamma-Al2O3 in catalytic ozonation of bromaminic acid (BAA) were investigated in-detail. The protonated surface hydroxyl groups S-OH2+ on Mn-CeOx/gamma-Al2O3 were the active sites for ozone decomposition, and HO center dot and O-2(center dot-). were main reactive oxygen species. The multivalence redox couples of Mn3+/4+ and Ce3+/4+ along with electron transfer between these redox couples and lattice oxygen, resulted in the synergistically catalytic effect between Mn and Ce in Mn-CeOx. A catalytic ozonation mechanism over Mn-CeOx/gamma-Al2O3 was tentatively proposed. The pilot-scale tests showed that the proposed catalytic ozonation has huge potential for the practical application in wastewater treatment.

辽ICP备05001357号 地址:中国·辽宁省大连市甘井子区凌工路2号 邮编:116024
版权所有:大连理工大学