Oxidative Adsorption of Elemental Mercury by Activated Carbon from Coconut Shell in Simulated Flue Gas
| Autor: | Jinsong Zhou, Li Jianxin, Zhongyang Luo, Zheng Jiao, Kefa Cen, Wang Yongchuan, Hu Changxing |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
chemistry.chemical_classification
Flue gas Process Chemistry and Technology General Chemical Engineering Inorganic chemistry chemistry.chemical_element Filtration and Separation Elemental mercury General Chemistry Divalent Catalysis Mercury (element) Adsorption chemistry medicine Continuous emission Activated carbon medicine.drug |
| Zdroj: | Separation Science and Technology. 49:1062-1066 |
| ISSN: | 1520-5754 0149-6395 |
| DOI: | 10.1080/01496395.2013.867883 |
| Popis: | The change of mercury speciation was measured by a continuous emission monitor when elemental mercury (Hg°) was adsorbed by activated carbon (AC-CS, made from coconut shell) in simulated coal-fired flue gas on a bench-scale adsorption experiment. Results showed that Hg° was oxidized to divalent mercury (Hg2+) and escaped as Hg2+ completely during the adsorption process in simulated flue gas. The components, such as NO, NO2, etc., had double influences on the Hg° adsorption on AC-CS. The positive way was that they could oxidize Hg° to Hg2+ with the catalysis of AC-CS surface, which promotes the Hg° adsorption, and the negative way was that they had competitive adsorption with Hg2+ on the AC-CS surface to inhibit the adsorption to a certain degree. It is economical to use the original AC to capture Hg in a complete flue gas with oxidization components and to use chemically treated AC in a clean flue gas. |
| Databáze: | OpenAIRE |
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