Analysis and comparison of the microporosity in Al-, Zr- and Ti-pillared clays

✍ Scribed by A. Gil; A. Massinon; P. Grange

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 620 KB
• Volume: 4
• Category: Article
• ISSN: 0927-6513
• DOI: 10.1016/0927-6513(95)00021-z

✦ Synopsis

The microporous accessibility of three pillared clays (AI-, Zr-and Ti-PILC) and two zeolites as references have been studied. Nitrogen adsorption data obtained at very low relative pressures were used to obtain a thorough characterization of the microporosity of the samples. The Dubinin-Radushkevich (DR) formalism was used to describe the volume filling of micropores and the energetic heterogeneity of microporous solids. The adsorption potential distributions and the Horvath-Kawazoe model confirm the existence of two sizes of micropores in the pillared clays and one size in the zeolites. Nevertheless, the two zeolites show a larger microporosity than the three pillared clays studied.