中国石油大学学报（自然科学版）2012，Vol.36Issue(6)：158-163,171,7.DOI:10.3969/j.issn.1673-5005.2012.06.029
Ag/TiO2-NaY吸附苯并噻吩热力学和动力学研究
Thermodynamics and kinetics studies on adsorption of benzothiophene onto Ag/TiO2-NaY zeolite
摘要
Abstract
The TiO2-NaY complex support was prepared by the sol-gel method and the Ag/TiO2-NaY adsorbent prepared by the impregnation method. The adsorbents were characterized by X-ray diffraction (XRD) , N2-adsorption specific surface are-a measurements (BET) and scanning electron microscope (SEM). The influence of several variables such as contact time, mass of adsorbent and initial concentration of sulfur on the adsorption were investigated. The isotherms and kinetics of benzo-thiophene (BT) adsorption from petroleumether onto Ag/TiO2-NaY were studied, and the thermodynamic parameters( △G, △H, △S) for the adsorption of BT were calculated. The results show that anatase TiO2 is the main phase over AgTY adsorbent and the Y-zeolite framework of TiO2-NaY zeolite is retained unchanged compared with NaY. With adsorption temperature of 50 ℃ , adsorption time of 180 min and adsorbent/oil ratio of 0. 01 g/mL, the equilibrium adsorption capacity is 1. 346%. Compared with Freundlich equation, the Langmuir model can well describe the adsorption isotherms of BT onto Ag/TiO2-NaY, and the kinetics for the adsorption process can be described by pseudo-second-order model.关键词
苯并噻吩/沸石/吸附脱硫/动力学/热力学Key words
benzothiophene/ zeolite/ adsorption desulfurization/ kinetics/ thermodynamics分类
化学化工引用本文复制引用
宋华,王登,宋华林,穆金城..Ag/TiO2-NaY吸附苯并噻吩热力学和动力学研究[J].中国石油大学学报（自然科学版）,2012,36(6):158-163,171,7.基金项目
国家自然科学基金项目(21276048) （21276048）
黑龙江省自然科学基金重点项目(ZD201201) （ZD201201）
