苯在介孔FDU-16晶内扩散性能的研究  

Intracrystalline Diffusion of Benzene in Mesoporous FDU-16

作　　者：陈云超[1] 涂高美[1] 周伟赣[1] 张富民[1] 钟依均[1] 朱伟东[1] 

机构地区：[1]浙江师范大学物理化学研究所,先进催化材料教育部重点实验室,浙江金华321004

出　　处：《广东化工》2013年第12期5-7,4,共4页Guangdong Chemical Industry

基　　金：国家自然科学基金重点项目(21036006)

摘　　要：采用有机-有机自组装法制备了介孔FDU-16,并用XRD、SEM、TEM和N2吸-脱附等技术对所合成样品进行了详细表征。在此基础上,首次利用零长柱(Zero-length column,ZLC)技术,以苯为探针分子系统研究了FDU-16晶内扩散性能。结果表明,FDU-16是介孔和微孔共存的碳材料,且以微孔为主;尽管FDU-16含介孔,探针分子苯在FDU-16晶内的传质限制是其在微孔中的扩散;由于苯的分子尺寸与FDU-16中的微孔孔径相当,导致苯在FDU-16晶内扩散缓慢,且有高的扩散活化能。Mesoporous FDU-16 was synthesized by an organic-organic self-assembly method, and the synthesized sample was characterized by XRD, SEM, TEM and N2-adsorption-desorption techniques in detail. For the first time, a ZLC technique was applied to the investigation on the intracrystalline diffusion of benzene as probe in the synthesized FDU-16 crystals. The results show that the synthesized FDU-16 possesses micropores and mesopores simultaneously while its microporosity is dominant. Although FDU-16 contains some mesoporosity, the mass-transfer limitations of benzene in FDU-16 are mainly in its diffusion in the micropores, resulting in low diffusivities and a high activation energy for diffusion.

关 键 词：介孔碳FDU-16 ZLC技术 苯 晶内扩散 

分 类 号：O64[理学—物理化学]