The performance and reaction pathway of δ-MnO2/USY for catalytic oxidation of toluene in the presence of ozone at room temperature

Ruijie Yang; Pingping Han; Yingying Fan; Zhongjie Guo; Qitong Zhao; Yang Wang; Sainan Che; Songxue Lin; Rongshu Zhu

doi:10.1016/j.chemosphere.2020.125864

The performance and reaction pathway of δ-MnO₂/USY for catalytic oxidation of toluene in the presence of ozone at room temperature

Chemosphere. 2020 May:247:125864. doi: 10.1016/j.chemosphere.2020.125864. Epub 2020 Jan 8.

Authors

Ruijie Yang¹, Pingping Han¹, Yingying Fan¹, Zhongjie Guo¹, Qitong Zhao¹, Yang Wang¹, Sainan Che¹, Songxue Lin¹, Rongshu Zhu²

Affiliations

¹ Shenzhen Key Laboratory of Organic Pollution Prevention and Control, Environmental Science and Engineering Research Center, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, PR China; International Joint Research Center for Persistent Toxic Substances, Harbin Institute of Technology(Shenzhen), Shenzhen, 518055, PR China.
² Shenzhen Key Laboratory of Organic Pollution Prevention and Control, Environmental Science and Engineering Research Center, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, PR China; International Joint Research Center for Persistent Toxic Substances, Harbin Institute of Technology(Shenzhen), Shenzhen, 518055, PR China. Electronic address: rszhu@hit.edu.cn.

PMID: 31931318
DOI: 10.1016/j.chemosphere.2020.125864

Abstract

In this work, a series of δ-MnO₂/USY with different contents of δ-MnO₂ (0.3 wt%, 1.5 wt%, 3.0 wt%, 10.0 wt%, and 15.0 wt%) were prepared. In addition, their performances of the adsorption of toluene, degradation and mineralization of toluene, and removal of ozone (O₃) were investigated. The results showed that, among all the samples, 3.0 wt% δ-MnO₂/USY displayed the best performance of toluene adsorption, degradation and mineralization. Furthermore, according to the in situ DRIFTS and GC-MS analysis, the intermediate by-products during the toluene degradation progress were ascertained and the possible pathway of catalytic oxidation toluene by δ-MnO₂/USY in the presence of O₃ was proposed.

Keywords: Catalytic oxidation pathway; Ozone; Toluene; USY; δ-MnO(2).

MeSH terms

Adsorption
Catalysis
Manganese Compounds / chemistry*
Models, Theoretical
Oxidation-Reduction
Oxides / chemistry*
Ozone / analysis*
Surface Properties
Temperature
Toluene / analysis*
Volatile Organic Compounds / analysis*
Zeolites / chemistry*

Substances

Manganese Compounds
Oxides
Volatile Organic Compounds
Zeolites
Toluene
Ozone
manganese dioxide