Kinetic study of hydrogen sulfide absorption in aqueous chlorine solution
| Autor: | Valérie Courousse, Annabelle Couvert, Pierre-François Biard, Jean-Baptiste Vilmain, Mohamed Azizi |
|---|---|
| Přispěvatelé: | Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université européenne de Bretagne - European University of Brittany (UEB), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
scrubber
Hypochlorous acid General Chemical Engineering Hydrogen sulfide Inorganic chemistry Hypochlorite chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 01 natural sciences 7. Clean energy Chemical kinetics chemistry.chemical_compound [CHIM.GENI]Chemical Sciences/Chemical engineering Mass transfer mass transfer Chlorine 0105 earth and related environmental sciences Aqueous solution [SDE.IE]Environmental Sciences/Environmental Engineering General Chemistry 021001 nanoscience & nanotechnology equipment and supplies 6. Clean water chemistry kinetics chlorine Absorption (chemistry) 0210 nano-technology absorption |
| Zdroj: | Chemical Engineering Research and Design Chemical Engineering Research and Design, 2014, 92 (2), pp.191-204. ⟨10.1016/j.cherd.2013.07.015⟩ Chemical Engineering Research and Design, Elsevier, 2014, 92 (2), pp.191-204. ⟨10.1016/j.cherd.2013.07.015⟩ |
| ISSN: | 0263-8762 1744-3563 |
| Popis: | Hydrogen sulfide (H 2 S) is currently removed from gaseous effluents by chemical scrubbing using water. Chlorine is a top-grade oxidant, reacting with H 2 S with a fast kinetic rate and enhancing its mass transfer rate. To design, optimize and scale-up scrubbers, knowledge of the reaction kinetics and mechanism is requested. This study investigates the H 2 S oxidation rate by reactive absorption in a mechanically agitated gas–liquid reactor. Mass transfer (gas and liquid sides mass transfer coefficients) and hydrodynamic (interfacial area) performances of the gas–liquid reactor were measured using appropriated physical or chemical absorption methods. The accuracy of these parameters was checked by modeling the H 2 S absorption in water without oxidant. A sensitivity analysis confirmed the robustness of the model. Finally, reactive absorption of H 2 S in chlorine solution for acidic or circumneutral pH allowed to investigate the kinetics of reaction. The overall oxidation mechanism could be described assuming that H 2 S is oxidized irreversibly by both hypochlorite anion ClO − ( k = 6.75 × 10 6 L mol −1 s −1 ) and hypochlorous acid ClOH ( k = 1.62 × 10 5 L mol −1 s −1 ). |
| Databáze: | OpenAIRE |
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