CAJ | 학술논문

采用溶胶-凝胶法分别制备Ag-HMS、Al-HMS和AgAl-HMS分子筛,并对其进行XRD、BET等表征;考察不同制备条件对分子筛结构和吸附性能的影响.用动态吸附实验测定3种分子筛对模拟油中硫化物的吸附性能,并考察AgAl-HMS分子筛对噻吩( T)、苯并噻吩( BT)和二苯并噻吩( DBT)的吸附选择性,以及甲苯对其吸附性能的影响.结果表明:3种分子筛的骨架结构基本一致,具有明显HMS分子筛的六方介孔结构.当硅铝摩尔比为30,银硅摩尔比为0. 02时,3种分子筛的吸附能力依次为AgAl-HMS>Ag-HMS>Al-HMS. AgAl-HMS对 T、BT和DBT的吸附选择性依次为DBT>BT>T.模拟油中加入甲苯后,穿透容量降低了41. 9 %.
채용용효-응효법분별제비Ag-HMS、Al-HMS화AgAl-HMS분자사,병대기진행XRD、BET등표정;고찰불동제비조건대분자사결구화흡부성능적영향.용동태흡부실험측정3충분자사대모의유중류화물적흡부성능,병고찰AgAl-HMS분자사대새분( T)、분병새분( BT)화이분병새분( DBT)적흡부선택성,이급갑분대기흡부성능적영향.결과표명:3충분자사적골가결구기본일치,구유명현HMS분자사적륙방개공결구.당규려마이비위30,은규마이비위0. 02시,3충분자사적흡부능력의차위AgAl-HMS>Ag-HMS>Al-HMS. AgAl-HMS대 T、BT화DBT적흡부선택성의차위DBT>BT>T.모의유중가입갑분후,천투용량강저료41. 9 %.
Ag-HMS,Al-HMS and AgAl-HMS were prepared by sol-gel method,and they were charac-terized by XRD and BET. The effects of different preparation conditions were studied on zeolites′ struc-ture and adsorptive properties. The adsorptive capacities of zeolites were evaluated by dynamic adsorption experiments, the adsorptive selectivity of AgAl-HMS for thiophene ( T ) , benzothiophene ( BT ) and dibenzothiophene( DBT) was evaluated and the competitive effect of toluene was investigated. The results showed that the framework of three zeolites were consistent and had hexagonal mesoporous structure. When the n(Si)/n(Al) =30,n(Ag)/n(Si) =0. 02,the adsorptive capacities of three zeolites by the or-der of AgAl-HMS> Ag-HMS>Al-HMS. The adsorptive selectivity of AgAl-HMS decreased in the order of DBT > BT > T. After toluene was added to the model fuel, the breakthrough capacity decreased 41. 9 %,which might be resulted by competitive adsorption through theπ-complexation between Ag+ and toluene.