Kinetic Analysis on As(III) Oxidation in a Fixed-Bed Flow Reactor Filled with a Supported Platinum Catalyst
| Autor: | Hiromichi Kondo, Kazumasa Oshima, Tsuyoshi Yamamoto, Masahiro Kishida |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Journal of Chemical Engineering of Japan, Vol 56, Iss 1 (2023) |
| Druh dokumentu: | article |
| ISSN: | 00219592 1881-1299 0021-9592 |
| DOI: | 10.1080/00219592.2023.2212703 |
| Popis: | In this study, the oxidation of As(III) was examined in a fixed-bed flow reactor filled with a SiO2-supported Pt catalyst, and the reaction kinetics were analyzed. The results of the experiments with different concentrations of As(III) at small W/F suggest that the reaction follows the Langmuir-Hinshelwood (L-H) mechanism. However, at large W/F, the kinetic equations different from the L-H equation were obtained because the O2 supply to the catalyst surface was rate-limiting. It was also demonstrated using this reactor that As(III) of an equivalent concentration as the mine effluent was almost completely oxidized to As(V) with only dissolved O2. |
| Databáze: | Directory of Open Access Journals |
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