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原位水热合成Ce(Ⅳ)-X分子筛及对噻吩的吸附性能

孙霞,  王学松,  李健生

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文章导航 > 燃料化学学报（中英文）  > 2012 >  40(12): 1480-1486
孙霞, 王学松, 李健生. 原位水热合成Ce(Ⅳ)-X分子筛及对噻吩的吸附性能[J]. 燃料化学学报（中英文）, 2012, 40(12): 1480-1486.
引用本文: 孙霞, 王学松, 李健生. 原位水热合成Ce(Ⅳ)-X分子筛及对噻吩的吸附性能[J]. 燃料化学学报（中英文）, 2012, 40(12): 1480-1486.
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SUN Xia, WANG Xue-song, LI Jian-sheng. In situ hydrothermal synthesis of cerium-incorporated X zeolites and their performance in thiophene adsorption[J]. Journal of Fuel Chemistry and Technology, 2012, 40(12): 1480-1486.
Citation: SUN Xia, WANG Xue-song, LI Jian-sheng. In situ hydrothermal synthesis of cerium-incorporated X zeolites and their performance in thiophene adsorption[J]. Journal of Fuel Chemistry and Technology, 2012, 40(12): 1480-1486.
shu

原位水热合成Ce(Ⅳ)-X分子筛及对噻吩的吸附性能

  • 1.

    淮海工学院 环境工程系, 江苏 连云港 222001;

  • 2.

    南京理工大学 环境科学与工程系, 江苏 南京 210094

基金项目: 国家自然科学基金(20977040); 淮海工学院自然科学基金(2009023)。
详细信息
    通讯作者:

    孙霞(1976-), 女, 江苏赣榆人, 讲师, 博士研究生, 从事环境功能材料的制备及应用研究。 E-mail: lygsunxia@163.com。

  • 中图分类号: TQ028.15

In situ hydrothermal synthesis of cerium-incorporated X zeolites and their performance in thiophene adsorption

  • 1.

    School of Environmental Engineering, Huaihai Institute of Technology, Lianyungang 222001, China;

  • 2.

    Department of Environmental Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

    摘要
  • 摘要: 通过原位水热合成方法直接制备出不同载Ce量的Ce(Ⅳ)-X分子筛,并考察了其对模拟汽油中噻吩的吸附性能。采用粉末X射线衍射(XRD)、傅里叶变换红外(FT-IR)、紫外-可见漫反射(UV-vis DRS)、全谱直读等离子体原子发射光谱(ICP-AES)、氮气吸附和NH3程序升温热脱附(NH3-TPD)等方法对分子筛进行表征。结果表明,合成分子筛均具备典型的X型分子筛结构,同时Ce(Ⅳ)被较好地引入到分子筛的骨架结构中;载Ce分子筛的酸性大于X分子筛,而且Ce(Ⅳ)-X分子筛的酸性随着Ce掺杂量的增加而增强。吸附实验表明,载Ce分子筛对噻吩的吸附性能明显好于X分子筛。其中,n(Ce)/n(Si)=0.05的分子筛脱硫效果最佳,饱和吸附容量达到52.541 9 mg/g。再生实验表明,加热再生的Ce(Ⅳ)-X分子筛对噻吩仍具有理想的吸附效果。n(Ce)/n(Si)=0.05的分子筛再生后饱和吸附容量为47.512 1 mg/g,约为新鲜吸附剂的90.43％。
    Abstract: A series of cerium-incorporated X zeolites (Ce(IV)-X) with different Ce/Si molar ratios were prepared by in situ hydrothermal synthesis and used as adsorbents to remove thiophene from a model fuel. The synthesized Ce(IV)-X zeolites were characterized by X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), diffuse reflectance ultraviolet spectroscopy (UV-vis DRS), plasma atomic emission spectrometry (ICP-AES), N2 adsorption, and NH3 temperature programmed desorption (NH3-TPD). Results reveal that the synthesized Ce(IV)-X zeolites exhibit typical structure of X zeolites and cerium (IV) ions are well dispersed in the framework of X zeolites. The acidity of Ce(IV)-X is enhanced by incorporating cerium, especially at high cerium content. The synthesised Ce(IV)-X zeolites exhibit better capability for the adsorption of thiophene from the model fuel than X zeolites; the Ce(IV)-X sample with n(Ce)/n(Si)=0.05 performs best, possessing a saturated adsorption amount of 52.541 9 mg/g. Moreover, the spent Ce(IV)-X after regeneration still has a perfect adsorption ability towards thiophene; the regenerated Ce(IV)-X sample with n(Ce)/n(Si)=0.05 has a saturated adsorption amount of 47.512 1 mg/g, i.e. 90.43％ of that for the fresh adsorbent.
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  • 收稿日期:  2012-03-10
  • 修回日期:  2012-06-21
  • 刊出日期:  2012-12-31

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