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Adsorption and desorption of SO2, NO and chlorobenzene on activated carbon
Li, YR; Guo, YY; Zhu, TY; Ding, S
MAY
发表期刊JOURNAL OF ENVIRONMENTAL SCIENCES
ISSN1001-0742
卷号43页码:128
摘要Activated carbon (AC) is very effective for multi-pollutant removal; however, the complicated components in flue gas can influence each other's adsorption. A series of adsorption experiments for multicomponents, including SO2, NO, chlorobenzene and H2O, on AC were performed in a fixed-bed reactor. For single-component adsorption, the adsorption amount for chlorobenzene was larger than for SO2 and NO on the AC. In the multi-component atmosphere, the adsorption amount decreased by 27.6% for chlorobenzene and decreased by 95.6% for NO, whereas it increased by a factor of two for SO2, demonstrating that a complex atmosphere is unfavorable for chlorobenzene adsorption and inhibits NO adsorption. In contrast, it is very beneficial for SO2 adsorption. The temperature-programmed desorption (TPD) results indicated that the binding strength between the gas adsorbates and the AC follows the order of SO2 > chlorobenzene > NO. The adsorption amount is independent of the binding strength. The presence of H2O enhanced the component effects, while it weakened the binding force between the gas adsorbates and the AC. AC oxygen functional groups were analyzed using TPD and X-ray photoelectron spectroscopy (XPS) measurements. The results reveal the reason why the chlorobenzene adsorption is less affected by the presence of other components. Lactone groups partly transform into carbonyl and quinone groups after chlorobenzene desorption. The chlorobenzene adsorption increases the number of C = 0 groups, which explains the positive effect of chlorobenzene on SO2 adsorption and the strong NO adsorption. (C) 2015 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
关键词Water-vapor Temperature Fibers Oxygen Co2 Mechanism Removal Gas
WOS标题词Environmental Sciences & Ecology
DOI10.1016/j.jes.2015.08.022
WOS记录号WOS:000377139500015
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/22569
专题研究所(批量导入)
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GB/T 7714
Li, YR,Guo, YY,Zhu, TY,et al. Adsorption and desorption of SO2, NO and chlorobenzene on activated carbon[J]. JOURNAL OF ENVIRONMENTAL SCIENCES
APA Li, YR,Guo, YY,Zhu, TY,&Ding, S.
MLA Li, YR,et al."Adsorption and desorption of SO2, NO and chlorobenzene on activated carbon".JOURNAL OF ENVIRONMENTAL SCIENCES 43
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