噻吩、苯和正辛烷在NaY和CeY分子筛上的热脱附

Desorption of thiophene,benzene and n-octane on NaY and CeY zeolites

采用智能质量分析仪(IGA),利用程序升温脱附法(TPD)研究了噻吩、苯和正辛烷在NaY和CeY分子筛上的热脱附行为,测定了升温速率为15 K/min时3种吸附质在NaY和CeY上的热重(TG)和微分热重(DTG)曲线。结果表明,3种吸附质在NaY上脱附比较容易,苯和正辛烷在CeY上脱附也很容易,但噻吩在CeY上脱附比较困难,噻吩有一部分不能完全脱附。CeY对噻吩具有较好的吸附选择性,而NaY的吸附选择性不好。

Desorption of thiophene,benzene and n-octane on NaY or CeY zeolites was studied using an Intelligent Gravimetric Analyzer（IGA）. The tests determined the temperature programmed desorption graphes of thiophene,benzene and n-octane on NaY or CeY zeoliies at a 15K/min heating rate. Thio phen. benzene and n-octane could desorb easily from NaY zeolites,and on CeY benzene and n-octane could also do. But thiophene desorbed very difficultly from CeY and a part of thiophene could still not desorb completely. The results showed that ,the adsorption selectivity of thiophene on CeY was better and on NaY was poorer.