| Title: | Effective toluene oxidation under ozone over mesoporous MnO(x)/gamma-Al(2)O(3) catalyst prepared by solvent deficient method: Effect of Mn precursors on catalytic activity |
| Author(s): | Reddy KHP; Kim BS; Lam SS; Jung SC; Song J; Park YK; |
| Address: | "School of Environmental Engineering, University of Seoul, Seoul, 02504, Republic of Korea. Hydrogen Research Center, Research Institute of Industrial Science and Technology, Pohang, 37673, Republic of Korea. Pyrolysis Technology Research Group, Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (Akuatrop), Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia. Department of Environmental Engineering, Sunchon National University, Suncheon, 57923, Republic of Korea. Department of Civil and Environmental Engineering, Sejong University, Seoul, 05006, Republic of Korea. School of Environmental Engineering, University of Seoul, Seoul, 02504, Republic of Korea. Electronic address: catalica@uos.ac.kr" |
| DOI: | 10.1016/j.envres.2021.110876 |
| ISSN/ISBN: | 1096-0953 (Electronic) 0013-9351 (Linking) |
| Abstract: | "In this study, the role of manganese precursors in mesoporous (meso) MnOx/gamma-Al(2)O(3) catalysts was examined systematically for toluene oxidation under ozone at ambient temperature (20 degrees C). The meso MnOx/gamma-Al(2)O(3) catalysts developed with Mn(CH(3)COO)(2,) MnCl(2), Mn(NO(3))(2).4H(2)O and MnSO(4) were prepared by an innovative single step solvent-deficient method (SDM); the catalysts were labeled as MnO(x)/Al(2)O(3)(A), MnO(x)/Al(2)O(3)(C), MnO(x)/Al(2)O(3)(N), and MnOx/Al(2)O(3)(S), respectively. Among all, MnO(x)/Al(2)O(3)(C) showed superior performance both in toluene removal (95%) as well as ozone decomposition (88%) followed by acetate, nitrate and sulphated precursor MnO(x)/Al(2)O(3). The superior performance of MnO(x)/Al(2)O(3)(C) in the oxidation of toluene to CO(x) is associated with the ozone decomposition over highly dispersed MnO(x) in which extremely active oxygen radicals (O(2-), O(2)(2-) and O(-)) are generated to enhance the oxidation ability of the catalysts greatly. In addition, toluene adsorption over acid support played a vital role in this reaction. Hence, the properties such as optimum Mn(3+)/Mn(4+) ratio, acidic sites, and smaller particle size ( |
| Keywords: | Catalysis Oxidation-Reduction *Ozone Solvents Toluene Mn Ozone Precursor Solvent deficient method; |
| Notes: | "MedlineReddy, Kannapu Hari Prasad Kim, Beom-Sik Lam, Su Shiung Jung, Sang-Chul Song, JiHyeon Park, Young-Kwon eng Research Support, Non-U.S. Gov't Netherlands 2021/02/17 Environ Res. 2021 Apr; 195:110876. doi: 10.1016/j.envres.2021.110876. Epub 2021 Feb 13" |
