摘要
采用二次水热合成法制得ZSM-5分子筛膜,并对其负载金属离子进行改性。XRD、SEM等表征结果表明,所合成的为ZSM-5分子筛膜。所制得的膜经过负载金属离子改性后用于模拟汽油中噻吩类二元硫化物的分离,研究了不同负载离子种类、负载离子浓度和活化温度对二元硫化物竞争吸附的影响,同时还考察了膜的再生效果。实验表明:当银离子浓度为0.2mol/L时硫化物的分离因子最高达到1.7;当活化温度为450℃时ZSM-5分子筛膜的分离性能最好;苯并噻吩对噻吩有较强的竞争吸附影响。从再生性能看,负银ZSM-5分子筛膜的分离性能具有较好的稳定性。
ZSM-5 zeolite membranes were prepared by second growth method and modified with metallic ion.XRD and SEM were applied to characterize the zeolite membranes.The separation performance of these membranes for thiophenic sulfurs from n-hexane was evaluated.The competitive adsorption of thiophenic sulfurs on these membranes was investigated by varying the loaded ions,the ion concentration and the activation temperature.The regeneration of used membranes was also investigated.Results showed that the best separation factor of sulfides amounted to 1.7 by ZSM-5 membranes loaded with 0.2 mol/L Ag＋ solution.The separation performance of the membranes was the best when activated 450℃.Benzothiophene showed a strong competitive adsorption effect to thiophene.Regeneration results showed that ZSM-5 zeolite membranes have good stability.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2010年第3期444-448,共5页
Chemical Industry and Engineering Progress
基金
江苏省南京市留学人员科技活动资助项目
