| Title: | Comparative Investigation on Chlorobenzene Oxidation by Oxygen and Ozone over a MnO(x)/Al(2)O(3) Catalyst in the Presence of SO(2) |
| Author(s): | Lin F; Wang Z; Zhang Z; Xiang L; Yuan D; Yan B; Wang Z; Chen G; |
| Address: | "School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, P. R. China. The Institute for Energy Engineering, China Jiliang University, Hangzhou 310000, P. R. China. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, P. R. China. School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, P. R. China" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "Catalytic oxidation of volatile organic compounds (VOCs) usually encounters complicated components in flue gas causing severe deactivation that restrict its application in specific conditions. The Cl substitution in chlorobenzene further increases poisoning risks. Ozone assistance has unique superiority that can overcome these bottleneck problems. Herein, this study performs a comparative investigation of CB oxidation by oxygen and ozone over a simple Mn/Al(2)O(3) catalyst. CB conversion suffered from slight deactivation in oxygen atmosphere (from 90 to 70%) and more severe deactivation in the presence of SO(2) (from 90 to 45%) at 480 degrees C. Introduction of ozone successfully attained high CB conversion at low temperature (120 degrees C) with excellent stability and less byproducts. Especially, CB oxidation by ozone maintained its original conversion in the presence of SO(2). The deactivation process was simulated by synthesizing several sulfated catalysts. Direct sulfation on Mn/Al(2)O(3) attained more severe deactivation in CB conversion and CO(2) formation than sulfation on the Al(2)O(3) support. Ozone with a strong oxidation property promoted the CB oxidation cycle, facilitated desorption of carbonaceous intermediates, and protected MnO(x) species from severe erosion, thus exhibiting high and stable performance in CB oxidation" |
| Keywords: | Catalysis Chlorobenzenes Oxidation-Reduction Oxygen *Ozone Temperature; |
| Notes: | "MedlineLin, Fawei Wang, Zhi Zhang, Zhiman Xiang, Li Yuan, Dingkun Yan, Beibei Wang, Zhihua Chen, Guanyi eng Research Support, Non-U.S. Gov't 2021/02/20 Environ Sci Technol. 2021 Mar 2; 55(5):3341-3351. doi: 10.1021/acs.est.0c07862. Epub 2021 Feb 19" |
