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Citation: CUI Hu-Xiong, CHENG Tian-Tao, CHEN Jian-Min, XU Yong-Fu, FANG Wen. A Simulated Heterogeneous Reaction of SO₂ on the Surface of Hematite at Different Temperatures[J]. Acta Physico-Chimica Sinica, ;2008, 24(12): 2331-2336. doi: 10.3866/PKU.WHXB20081231 shu

A Simulated Heterogeneous Reaction of SO₂ on the Surface of Hematite at Different Temperatures

1.
Center for Atmospheric Chemistry Study, Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, P. R. China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, P. R. China; Institute of Weather Modification, Chinese Academy of Meteorological Sciences, Beijing 100084, P. R. China

Received Date: 7 July 2008
Available Online: 19 October 2008

Changes of the sulfate product and optical coefficients during the heterogeneous reaction of SO2 on the surface of hematite at different temperatures were investigated using in situ diffuse reflectance Fourier transform infrared spectroscopy (DFTIRS), ion chromatogram (IC), and transmission electron microscopy (TEM). Simulations revealed that within the ambient temperature of 15-45 ℃, the yield and velocity of sulfate product, absorption coefficient, and backward scattering coefficient firstly increased at 15-35 ℃ and then decreased at 35-45 ℃. At persistent temperature, the velocity of sulfate production showed an initial increase followed by a decrease and finally stabilized. There was a high exponential correlation between the optical coefficients and the amount of sulfate product generated. This result is important in understanding the heterogeneous reaction of SO2 on the surface of hematite in the environment and the assessment of this reaction’s impact on sulfate production and radiative forcing, considering the phenomenon of global warming.
- Hematite,
- Heterogeneous reaction,
- Temperature,
- Sulfate,
- Optical coefficient
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沈阳化工大学材料科学与工程学院沈阳 110142

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A Simulated Heterogeneous Reaction of SO2 on the Surface of Hematite at Different Temperatures

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通讯作者: 陈斌, bchen63@163.com

A Simulated Heterogeneous Reaction of SO₂ on the Surface of Hematite at Different Temperatures