Silicalite-1膜/活性炭复合材料的制备及吸附性能研究

The Synthesis and Perm-selective Adsorption Performance of Silicalite-1(Shell)/AC(Core) Encapsulated Composite Material

采用间歇振荡式水热晶化法在活性炭(AC)颗粒表面负载生长了Silicalite-1分子筛膜。所得到的样品经XRD、SEM表征,证明了这种材料是具有类似于以Silicalite-1为壳、AC为核结构的包覆型复合分子筛薄膜材料。研究中还以此复合材料为吸附剂,用于苯/均三甲苯混合液为模拟体系的吸附研究。结果表明,此类复合材料对动力学半径较小的苯的吸附能力明显优于均三甲苯,具有显著的选择性吸附特征。

This paper presents a novel intermittent-kettle-shaking in-situ hydrothermal synthesis to prepare a Silicalite-1 membrane on the surface of activated carbon granule.The Sil-icalite-1/AC composites are characterized by XRD and SEM respectively.The results confirm that it has activated carbon core inside and Silicalite-1 membrane outside.The composite mate-rials are also tested in the adsorption of the mixture of benzene and mesitylene as an adsorbent. The composites show an outstanding perm-selectivity adsorption performance to the benzene.