Amorphous and homogeneously Zr-doped MnOx with enhanced acid and redox properties for catalytic oxidation of 1,2-Dichloroethane

被引：67

作者：

Chen, Gong ^{[1
]}

Hong, Dongsen ^{[1
]}

Xia, Hangqi ^{[1
]}

Sun, Wei ^{[1
]}

Shao, Shijie ^{[1
]}

Gong, Binwei ^{[1
]}

Wang, Shun ^{[1
]}

Wu, Jinyan ^{[1
]}

Wang, Xingyi ^{[1
]}

Dai, Qiguang ^{[1
]}

机构：

[1] East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat Res Inst Ind Catalysis, Shanghai 200237, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2022年 / 428卷

基金：

中国国家自然科学基金; 上海市自然科学基金;

关键词：

Catalytic combustion; CVOCs; Acid-redox; Zr-Mn oxide; Amorphous; MIXED OXIDES; MANGANESE OXIDES; LOW-TEMPERATURE; THIN-FILMS; COMBUSTION; NO; DESTRUCTION; REDUCTION; HYDROGEN; INSIGHT;

D O I：

10.1016/j.cej.2021.131067

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Series of MnOx based catalysts were prepared and investigated for 1,2-dichloroethane (1,2-DCE) oxidation. RZrMn prepared by a novel reflux method presented an amorphous structure and homogeneous dispersion of Zr, which prominently enhanced acid and redox properties, such as more surface oxygen species and vacancies (OAds/OLatt = 0.53), better reducibility, severer Jahn-Teller distortion, more total acid amount (396 mu mol.g- 1) and Bronsted acid sites. Compared with the pristine MnOx and ZrO2, R-ZrMn exhibited a better catalytic activity for 1,2-DCE oxidation (T90 = 287 degrees C and the reaction rate at 150 degrees C was 5.13 mu mol min- 1.g- 1), less formation of chlorinated by-products, high durability and resistance-H2O. Catalytic oxidation of 1,2-DCE and the formation of chlorinated by-products on MnOx based catalysts was typically represented as a synergistic catalysis process of acid and redox sites, and a positive relationship between total acid amount or OAds/OLatt and reaction rate of 1,2DCE oxidation was clearly observed. Meanwhile, a possible mechanism and formation pathway were proposed.

引用

页数：15

共 62 条

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