摘要
采用水热离子交换法制备CeY分子筛,讨论了交换温度、交换时间、NaY分子筛与Ce(NO3)3溶液固液比、Ce(NO3)3溶液浓度对Ce3+交换量的影响;考察了不同Ce3+交换量CeY分子筛的吸附脱硫性能;研究了吸附温度、吸附时间对NaY/Cu(I)Y/CeY分子筛吸附脱硫性能的影响;借助于IR表征手段,分析了模拟燃油中苯和噻吩物种在CeY分子筛和Cu(I)Y分子筛的吸附,结果表明,CeY分子筛的脱硫效率最高(达95.6%),同时对含苯模拟油中的噻吩吸附具有选择性;Cu(I)Y分子筛由于苯和噻吩产生的竞争吸附,在含苯模拟油中脱硫效率有明显降低。
CeY- zeolite was prepared by conventional ion exchange method under hydrothennal conditions. Effects of some important preparation parameters（i, e. time, temperature, concentration and solid/solution ratio） on the Ce^3＋ exchange ratio were systematically investigated. A further experiment revealed the relationship between the Ce^3＋ exchange ratio and desulfurization performance of CeY zeolite.NaY, Cu（I）Y and CeY demonstrated different desulfurization behaviors under various adsorption temperatures and time. The competitive adsorption of benzene and thiophene from the model fuel on the Cu（I）Y/CeY zeolites was characterized by IR. Our results showed that CeY zeolite had the highest desulfufirization performance （i.e. 95.6% ） and a high selectivity towards benzene and thiophene, while the desulfurization efficiency of the Cu（I） Y zeolite was compromised as a result of benzene and thiophene adsorption.
出处
《稀土》
EI
CAS
CSCD
北大核心
2009年第4期49-53,共5页
Chinese Rare Earths
