不同类型硅胶对油气吸附性能的试验研究

Experimental study on the adsorption of gasoline vapor on different silica gels

吸附材料的性能对油气分子吸附过程起着关键性的作用。系统表征了3种硅胶吸附材料(A型、B型和C型)孔结构信息,计算了其标准特征吸附能,考察了其初次吸附钝化过程和动态吸附过程特性。实验结果表明,A型硅胶具有丰富的微孔结构,而B型硅胶和C型硅胶则为典型的介孔材料,通过标准吸附特征能可反映其微孔分布;初次钝化吸附量和动态吸附量变化情况相似,均为A型硅胶最大,B型硅胶次之,C型硅胶最小,微孔分布决定了油气分子吸附过程,从而影响对应的吸附量。

The performance of adsorbents plays a critical role in the adsorption of gasoline vapor mixtures. Therefore,this paper systematically characterized the pore structure information of three kinds of silica gels,including gel-A,gel-B and gel-C. The standard adsorption energy were calculated,and the performance of first passivation adsorption and dynamic adsorption were also investigated. The experimental results showed that gel-A has rich in microporous area,however,gel-B and gel-B exhibit obvious mesoporous character. And the standard adsorption energy calculated can also reveal the microporous distribution of three silica gels. In addition,the adsorbed capacity of first passivation and dynamic adsorption shows the same similar trend,gel-A > gel-B > gel-C. Gasoline vapor adsorption on silica gels was determined by microporous distribution,thus affecting the corresponding adsorption capacity.