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

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.