| Investigation of sulfur speciation in particles from small coal-burning boiler by XANES spectroscopy |
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| 作者姓名： | 包良满 林俊 刘卫 陆文忠 张桂林 李燕 马陈燕 赵屹东 何伟 胡天斗 |
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| 作者单位： | 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800,China;2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China;3 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China |
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| 基金项目： | Supported by Major Project of Knowledge Innovation Program of Chinese Academy of Sciences （KJCX3.SYW.N3）, Exploration Project of Knowledge Innovation Program of Chinese Academy of Sciences （90070301）, National Natural Science Foundation of China （10775174, 10775150） and BEPC National Laboratory （Vr-07113） |
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| 摘 要： | Sulfur K-edge X-ray absorption near-edge structure （XANES） spectroscopy was employed to study the speciation of sulfur in raw coal, ash by-product and fine particulate matter from a small coal-burning boiler. By means of least square analysis of the XANES spectra, the major organic and inorganic sulfur forms were quantitatively determined. The results show that about 70% of the sulfur in raw coal is present as organic and a minor fraction of the sulfur occurs as other forms： 17% of pyrite and 13% of sulfate. While in bottom ash, fly ash, and PM2.5, the dominant form of sulfur is sulfate, with the percentage of 80,79 and 94, respectively. Moreover, a number of other reduced sulfur including thiophenic sulfur, element sulfur and pyrrhotite are also present. During coal combustion, most of organic sulfur and pyrite were oxidized and released into the atmosphere as SO2 gas, part of them was converted to sulfate existing in coal combustion by-products, and a small part of pyrite was probably reduced to elemental sulfur and pyrrhotite. The results may provide information for assessing the pollution caused by small boiler and developing new methods for the control of SO2 pollution.
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| 关 键 词： | XANES谱 燃煤锅炉 硫形态 细颗粒 X射线吸收近边结构 二氧化硫气体 黄铁矿硫 污染控制 |
| 收稿时间： | 2008-12-18 |
| 修稿时间： | 2009-3-30 |
Investigation of sulfur speciation in particles from small coal-burning boiler by XANES spectroscop |
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| Institution: | [1]Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800,China; [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China; [3]Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | XANES, sulfur, coal, PM2.5, speciation |
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| Keywords: | XANES sulfur coal PM2 5 speciation |
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