Cu^+-13X上噻吩与苯并噻吩的竞争吸附

Competitive adsorption with thiophene and benzothiophene on Cu^+-13X

以噻吩(TP)、苯并噻吩(BT)和正己烷配制模拟汽油,就如何提高Cu+-13X分子筛对噻吩的选择性进行了一系列的静态吸附及动力学吸附研究。结果表明:增加模拟汽油中噻吩的初始质量分数,可以增大Cu+-13X对噻吩的吸附量,提高噻吩对苯并噻吩的竞争吸附性能。当模拟汽油中苯并噻吩、噻吩的初始质量分数分别为500,700μg/g时,Cu+-13X对噻吩的吸附量就大于苯并噻吩;当模拟汽油中苯并噻吩、噻吩的初始质量分数分别为350,850μg/g时,Cu+-13X对噻吩的选择性大于苯并噻吩,噻吩在竞争吸附中占优势。

Using thiophene,benzothiophene and n-hexane for preparing the simulated gasoline,a series of static adsorption and dynamic adsorption experiments for improving the Cu＋-13X molecular sieve selectivity to thiophene was carried out.The results show that if increasing the initial mass fraction of thiophene in the simulated gasoline,the adsorption capacity of thiophene on Cu＋-13X can be enhanced,thus improving the competitive adsorption of thiophene.When the initial mass fraction of benzothiophene and thiophene is 500,700 μg/g respectively,the adsorption capacity of thiophene on Cu＋-13X can be greater than that of benzothiophene.When the initial mass fraction of benzothiophene and thiophene in the simulated gasoline is 350,800 μg/g respectively,the selectivity of thiophene on Cu＋-13X is greater than that of benzothiophene,so thiophene has an advantage in the competitive adsorption.