Mn改性Cu^+-13X对双组分硫化物的动力学与动态吸附性能  

Kinetics and dynamic adsorption of bicomponent sufides on Mn modified Cu^+-13X

作　　者：张强[1] 祁伟建 居沈贵[1] 

机构地区：[1]南京工业大学化工学院,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2016年第2期119-124,共6页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家自然科学基金(21176118)

摘　　要：利用液相离子交换法制备Cu^+-13X与Mn^(2+)/Cu^+-13X吸附剂。吸附剂晶体结构使用X线衍射仪(XRD)和激光拉曼光谱进行表征。在常温常压下,将噻吩(TP)与苯并噻吩(BT)溶入正己烷溶液,用作模拟汽油,通过吸附动力学实验与动态吸附实验考察2种吸附剂对噻吩和苯并噻吩的吸附性能。以Crank模型对动力学吸附实验结果进行拟合。结果表明:Mn^(2+)的引入提高了苯并噻吩在吸附剂中的扩散系数;单组分动态实验中,Mn^(2+)改性后的Cu^+-13X对噻吩与苯并噻吩的最大吸附容量为48.66 mg/g与89.99 mg/g,较原先分别提高了13.8%与17.5%;双组分动态实验中,苯并噻吩在与噻吩的竞争吸附中占优势,对噻吩的置换量为10.01 mg/g。4次再生后的Mn^(2+)/Cu^+-13X仍可保证70%以上的脱硫效率。Cu^＋-13 X and Mn^2＋/ Cu^＋-13 X adsorbents were prepared by liquid phase ion exchange reaction. The adsorbents were characterized by X-ray diffraction（ XRD） and laser-Raman spectra. Adding thiophene（ TP） and benzothiophene（ BT） into n-hexane as model fuels,the dynamic adsorption and kinetics adsorption experiments at room temperature and atmosphere pressure were carried out. The Crank diffusion model was used to fit the kinetics data. Results showed that the adding of Mn^2＋improved the BT diffusion coefficient in the adsorbent. The largest adsorption amounts on Mn^2＋modified Cu^＋-13 X for TP and BT were 48. 66 mg / g and 89. 99 mg / g,increased 13. 8% and 17. 5% than the original adsorption ones. BT played a predominant role in the competitive adsorption with TP and replaced 10. 01 mg / g TP in the bicomponent dynamic experiment. Mn^2＋/ Cu^＋-13 X could ensure more than 70% of the desulfurization efficiency after using cycles four times.

关 键 词：Mn^2+/Cu^+-13X 吸附脱硫 吸附动力学 动态吸附 

分 类 号：TQ424.25[化学工程] TE624.54[石油与天然气工程—油气加工工程]