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首页> 外文期刊>Environmental Science & Technology >Effects of Surface Features on Sulfur Dioxide Adsorption on Calcined NiAl Hydrotalcite-like Compounds
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Effects of Surface Features on Sulfur Dioxide Adsorption on Calcined NiAl Hydrotalcite-like Compounds

机译：表面特征对煅烧NiAl类水滑石化合物吸附二氧化硫的影响

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摘要

The hydrotalcite-based NiAl mixed oxides were synthesized by coprecipitation and urea hydrolysis approaches and employed for SO_2 removal. The samples were well characterized by inductively coupled plasma (ICP) elemental analysis, X-ray dim-action (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and N2 adsorption/desorption isotherm analyses. The acid-base prop- erties were characterized by pyridine chemisorption and CO_2 temperature-programmed desorption (TPD). The calcined NiAlO from the urea method showed excellent SO_2 adsorption and its adsorption equilibrium showed a type I isotherm, which significantly improved the adsorption performance for low-concentration SO_2. Both the physical structure and the acidic-basic sites were found to play important roles in the SO_2 adsorption process. In situ Fourier transform infrared spectroscopy (FTIR) investigation revealed that adsorbed SO_2 molecules formed surface bisulfite, sulfite, and bidentate binudear sulfate. The mechanisms for SO_2 adsorption and transformation are discussed in detail.
机译：通过共沉淀和尿素水解的方法合成了水滑石基NiAl混合氧化物，并用于SO_2的去除。样品通过电感耦合等离子体（ICP）元素分析，X射线调光（XRD），扫描电子显微镜（SEM），X射线光电子能谱（XPS）和N2吸附/解吸等温线分析得到了很好的表征。酸碱性质的特征是吡啶化学吸附和CO_2程序升温脱附（TPD）。尿素法煅烧后的NiAlO表现出优异的SO_2吸附能力，其吸附平衡表现出I型等温线，从而显着提高了低浓度SO_2的吸附性能。发现物理结构和酸性碱性位点都在SO_2吸附过程中起重要作用。原位傅立叶变换红外光谱（FTIR）研究表明，吸附的SO_2分子形成了表面亚硫酸氢盐，亚硫酸盐和双齿硫酸硫酸二丁酯。详细讨论了SO_2的吸附和转化机理。

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  • 来源
    《Environmental Science & Technology》 |2011年第12期|p.5373-5379|共7页
  • 作者

    Ling Zhao; Xinyong Li; Xie Quan; Guohua Chen;

  • 作者单位

    Key Laboratory of Industrial Ecology and Environmental Engineering (MOE) and State Key Laboratory of Fine Chemical,School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China;

    Key Laboratory of Industrial Ecology and Environmental Engineering (MOE) and State Key Laboratory of Fine Chemical,School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China,Department of Chemical and Biomolecular Engineering, Hong Kong University of Science & Technology, Clear Water Bay,Kowloon, Hong Kong;

    Key Laboratory of Industrial Ecology and Environmental Engineering (MOE) and State Key Laboratory of Fine Chemical,School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China;

    Department of Chemical and Biomolecular Engineering, Hong Kong University of Science & Technology, Clear Water Bay,Kowloon, Hong Kong;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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