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以溶胶-凝胶法制备了TiO2-NaY(TY)分子筛载体,采用浸渍法制备了Ag/TiO2-NaY(AgTY)吸附剂,并用X射线衍射、傅里叶变换红外光谱和X射线光电子能谱技术对吸附剂进行了表征。在固定床吸附床上考察了含氮化合物和芳香族化合物对AgTY选择性吸附噻吩(TP)和苯并噻吩(BT)性能的影响,并研究了其吸附机理。结果表明,AgTY吸附剂中TiO2主要以锐钛矿型存在,与NaY相比,TY分子筛的骨架结构并未发生明显的改变;在吸附温度50℃时,AgTY吸附剂对噻吩、苯并噻吩的穿透硫容分别为0.45%和0.63%;对噻吩模拟油,吡啶对吸附脱硫影响比甲苯的影响大,而对于苯并噻吩模拟油,甲苯的影响比吡啶的影响大。噻吩类硫化物与AgTY吸附剂之间主要以π络合及S—M配位作用机理吸附。
The TiO2-NaY (TY) molecular sieve supports were prepared by sol-gel method. Ag / TiO2-NaY (AgTY) adsorbents were prepared by impregnation method and characterized by X-ray diffraction, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy Adsorbent technology was characterized. The effects of nitrogenous compounds and aromatics on selective adsorption of thiophene (TP) and benzothiophene (BT) on AgTY were investigated on a fixed bed adsorbent bed. The adsorption mechanism was also studied. The results show that TiO2 is mainly anatase in AgTY adsorbent. Compared with NaY, the structure of TY zeolite does not change obviously. When the adsorption temperature is 50 ℃, the adsorption of thiophene, benzothiophene The penetrating sulfur capacities were 0.45% and 0.63%, respectively. For thiophene simulated oil and pyridine, the effect of adsorption on desulfurization was greater than that of toluene. For benzothiophene simulated oil, the influence of toluene on pyridine was larger than that of pyridine. Thiophenes sulfide and AgTY adsorbent mainly between the π complex and S-M coordination mechanism of adsorption.