2017年5月
Vapor-phase elemental mercury adsorption by activated carbon co-impregnated with sulfur and chlorine
CHEMICAL ENGINEERING JOURNAL
- ,
- ,
- 巻
- 315
- 号
- 1
- 開始ページ
- 598
- 終了ページ
- 607
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.cej.2017.01.035
- 出版者・発行元
- ELSEVIER SCIENCE SA
In this study, a novel activated carbon appropriate for mercury (Hg) removal from flue gas was developed by co-impregnation with chlorine (CI) and sulfur (S). The adsorption performance was investigated through laboratory-scale Hg adsorption tests. Additionally, changes in the chemical species on activated carbon with Hg adsorption were clarified by the X-ray absorption near edge structure (XANES) spectra of Hg, Cl, and S edges. CI impregnation and S impregnation resulted in 80 and 50 times greater Hg adsorption than raw activated carbon, respectively. Calcium chloride and potassium sulfide were effective impregnants for the Hg removal. Co-impregnation with both Cl and S resulted in over 200 times greater Hg adsorption than that with raw activated carbon. The results show clearly that co-impregnation is a remarkably effective method for Hg adsorption. The XANES spectra of CI revealed that calcium chloride and potassium chloride were immobilized on co-impregnated activated carbon, while the XANES spectra of S showed that sulfide and sulfate were immobilized on co-impregnated activated carbon. Hg was captured mainly as a chemical species of S during Hg adsorption by co-impregnated activated carbons. The Hg species estimated from XANES spectra were consistent with the possible reaction formulae during impregnation and adsorption processes. (C) 2017 Elsevier B.V. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/j.cej.2017.01.035
- ISSN : 1385-8947
- eISSN : 1873-3212
- Web of Science ID : WOS:000395212300060