燃料化学学报2012，Vol.40Issue(12)：1480-1486,7.
原位水热合成Ce(Ⅳ)-X分子筛及对噻吩的吸附性能
In situ hydrothermal synthesis of cerium-incorporated X zeolites and their performance in thiophene adsorption
摘要
Abstract
A series of cerium-incorporated X zeolites (Ce(FV)-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.关键词
水热制备/Ce(Ⅳ)/X分子筛/噻吩/吸附/再生Key words
hydrothermal synthesis/Ce(]V) /X zeolite/thiophene/adsorption/regeneration分类
化学化工引用本文复制引用
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,2012,40(12):1480-1486,7.基金项目
国家自然科学基金(20977040) （20977040）
淮海工学院自然科学基金(2009023). （2009023）
