| Title: | Synergistic Catalytic Oxidation of Typical Volatile Organic Compound Mixtures on Mn-Based Catalysts: Significant Promotion Effect and Reaction Mechanism |
| Author(s): | Pan T; Deng H; Lu Y; Ma J; Wang L; Zhang C; He H; |
| Address: | "Center for Excellence in Regional Atmospheric Environment, Key Laboratory of Urban Pollutant Conversion, Xiamen Key Laboratory of Materials for Gaseous Pollutant Control, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China. University of Chinese Academy of Sciences, Beijing 100049, China. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "The miscellaneous volatile organic compounds (VOCs) in industrial flue gas streams usually demonstrate significant mutual inhibition effects, and the behavior of a particular VOC in mixtures is not clear, which hinders the application of catalytic technology. This study examines the catalytic oxidation and mixing effects of representative VOCs in industrial exhausts, consisting of acetone (AC), ethyl acetate (EA), and toluene (Tol), on common Mn-based catalysts (e.g., MnO(2), Mn(2)O(3), LaMnO(3), and Mn(3)O(4)) by means of intrinsic activity evaluation, coadsorption, VOC temperature-programmed oxidation, in situ diffuse reflectance infrared Fourier transform spectroscopy, and gas chromatography-mass spectrometry. The results showed no inhibiting effect on the conversion of these VOCs when combusted together; instead, a significant mutual promotion effect was found, especially on Tol destruction, with a sharp decrease in the Tol T(50) from 214 to 158 degrees C on MnO(2). It is proposed for the first time that the addition of AC/EA in Tol combustion leads to the generation of o/m-methyl phenol, which changes the rate-determining step of the ring-opening process, thus elevating the conversion of Tol together with AC and EA in the mixture at low temperatures" |
| Keywords: | *Volatile Organic Compounds/analysis/chemistry Oxides/chemistry Manganese Compounds/chemistry Oxidation-Reduction Temperature Catalysis Toluene/analysis/chemistry MnO2 catalyst VOCs catalytic oxidation mixing effect toluene; |
| Notes: | "MedlinePan, Tingting Deng, Hua Lu, Yuqin Ma, Jinzhu Wang, Lian Zhang, Changbin He, Hong eng Research Support, Non-U.S. Gov't 2023/01/18 Environ Sci Technol. 2023 Jan 17; 57(2):1123-1133. doi: 10.1021/acs.est.2c06514. Epub 2022 Dec 13" |
