Preparation, characterization, and application of modified chitosan sorbents for elemental mercury removal
Preparation, characterization, and application of modified chitosan sorbents for elemental mercury removal
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DOI：
10.1021/ie9000629
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发表时间：
2009-03
影响因子：
4.2
通讯作者：
Anchao Zhang;J. Xiang;L. Sun;Song Hu;Peisheng Li;Jinming Shi;P. Fu;Sheng Su
中科院分区：
文献类型：
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作者：
Anchao Zhang;J. Xiang;L. Sun;Song Hu;Peisheng Li;Jinming Shi;P. Fu;Sheng Su
A series of raw, iodine (bromide) or/and sulfuric acid-modified chitosan sorbents were synthesized and comprehensively characterized by N2 isotherm adsorption/desorption method, TGA, FTIR, XRD, and XPS et al. Adsorption experiments of vapor-phase elemental mercury (Hg0) were studied using the sorbents in a laboratory-scale fixed-bed reactor. The results revealed that porosities and specific surface areas of the sorbents decreased after modification. The sorbents operated stably at flue-gas temperature below 140 °C. The chemical reactions of iodine and sulfate ion with the amide of chitosan occurred, and the I2 was found in the sorbents due to the presence of H2SO4. Fixed-bed adsorber tests showed that compared to raw chitosan, the bromide or iodine-modified chitosan could promote the efficiency of Hg0 capture more or less. Mercury removal efficiency could be significantly promoted when an appropriate content of H2SO4 was added, and the iodine and H2SO4 modified sorbents almost had a mercury removal effici...
