Mesopores in USY Zeolites

Wolfgang Lutz (1) , Dirk Enke (2) , Wolf-Dieter Einicke (2) , Dirk Täschner (3) , Rolf Kurzhals (4)

1 Luftchemie
2 Institute of Chemical Technology
3 Süd-Chemie Zeolites GmbH
4 Sud-Chemie Zeolites GmbH

Zeolites of type NaY synthesized by use of seed-solution and zeolite X-seeds to initialise the crystallization were compared. A different homogeneity of the internal framework structure related to the Si/Al ratio was expected. Thus, the formation of closed bulk mesopores should be influenced during treatment of NH4NaY modification for 7 hours at 450°C and 600°C in the water steam of 1 bar. Occurrence of different mesopores was actually observed in obtained ultra-stable USY zeolites using Nitrogen adsorption. Whereas USY prepared by use of seed-solution contains only open mesopores at the crystal surface, the X-seed synthesized material contains open and closed mesopores at the surface and in the nuclei of samples, respectively.

Mots clés: Physical Sciences

Wolfgang Lutz, Dirk Enke, Wolf-Dieter Einicke, Dirk Täschner, Rolf Kurzhals. Mesopores in USY Zeolites. Journal of Inorganic and General Chemistry / Zeitschrift für anorganische und allgemeine Chemie, 2010, 636 (15), pp.2532. ⟨10.1002/zaac.201000271⟩. ⟨hal-00599885⟩