title: High-resolution adsorption analysis of pillared zeolites IPC-3PI and MCM-36.
abstract: The porous structure of pillared zeolites IPC-3PI and MCM-36 and their precursors IPC-3P and MCM-22P, respectively, has been investigated by means of a high-resolution adsorption analysis. The analysis was based on argon adsorption isotherms measured at 87 K from the relative pressure of 10(-6). The isotherms were processed by means of the t-plot method, which made it possible to distinguish adsorption in micropores from adsorption in mesopores. The pore size distribution was evaluated from argon isotherms using Non-Local Density Functional Theory. The obtained results have shown that the microporous structure of the MWW layers is preserved in both pillared zeolites. In contrast to precursors IPC-3P and MCM-22P, pillared samples are characterized by the formation of a porous structure belonging to the lower mesopore region. The distribution of mesopores in the zeolite IPC-3PI is broader and is shifted to larger widths in comparison with the zeolite MCM-36.
authors.affiliation: Department of Synthesis and Catalysis, J. Heyrovský Institute of Physical Chemistry of the ASCR, v.v.i., Academy of Sciences of the Czech Republic, Dolejškova 2155/3, 182 23 Prague, Czech Republic. arnost.zukal@jh-inst.cas.cz.
authors.forename: Arnošt
authors.initials: A
authors.lastname: Zukal
authors.forename: Martin
authors.initials: M
authors.lastname: Kubů