中文摘要：

通过静态吸附实验考察了环己烷、苯、噻吩和四氢噻吩在MCM-41、SBA-15和NaY吸附剂上的吸附,探讨了分子筛孔结构与表面酸性位对吸附性能的影响。结果表明：MCM-41吸附剂的比表面积及孔体积均大于SBA-15吸附剂,使其对4种吸附质的吸附量均比SBA-15分子筛的大;NaY分子筛的孔径与环己烷、苯、噻吩和四氢噻吩的分子动力学直径相差不大,且其表面有L酸位和B酸位的存在,使得其对4种吸附质的吸附量远大于纯硅MCM-41和SBA-15分子筛;4种吸附质在NaY吸附剂上的饱和吸附量由大到小为噻吩、四氢噻吩、苯、环己烷,主要通过大π键与L酸作用的方式吸附;4种吸附质在MCM-41和SBA-15吸附剂上的饱和吸附量由大到小分别为四氢噻吩,噻吩,苯,环己烷,主要是通过硫原子上的孤对电子与B酸位作用的方式吸附。

英文摘要：

Adsorption performances of MCM-41,SBA-15 and NaY zeolites for cyclohexane,benzene,thiophene and tetrahydrothiohene were investigated by static adsorption experiments.The influences of pore structure and surface acid sites on adsorption activity of sorbents were discussed.The results show that,the adsorption capacity of MCM-41 towards these four adsorbates is higher than that by SBA-15 zeolite because of the larger surface area and pore volume of MCM-41 zeolite.NaY zeolite has both Lewis and Br9 nsted acid sites on its surface,and its pore size is close to the dynamic diameter of cyclohexane,benzene,thiophene,and tetrahydrothiophene molecules,which results in the significantly larger adsorption capacity of NaY than that of MCM-41 and SBA-15.Moreover,the interaction between conjugatedπbond and Lewis acid sites contributes a lot to the adsorption performance of NaY zeolite,and the adsorption capacity follows the descending order of thiophene,tetrahydrothiophene,benzene,and cyclohexane.Whereas,the interaction between the lone pair electrons of S atom and Bronsted acid sites contributes more to the adsorption performance of MCM-41 and SBA-15 zeolites,and the desscending adsorption capacity order is tetrahydrothiophene,thiophene,benzene,and cyclohexane.