III International Conference

CATALYTIC PROPERTIES OF LAYERED OF CLAYSPP-II-136Timofeeva M.N., Kovalenko O.N., Kundo N. N., Gogina L.V., Elumeeva K.V.,Khankhasaevan S.Ts. 1 , Badmaeva S.V. 1 , Moronta A. 2Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia1 Baikal Institute of Nature Management, Ulan-Ude, Russia2 Instituto de Superficies y Catalisis, Maracaibo 4003, VenezuelaE-mail: timofeeva@catalysis.nsk.suNowadays considerable attention has been given to the development of new functionallyactive sorbents, supports, and a new class of catalysts based on clay minerals. These materialspossess unique structural and catalytic properties due to the capacity adjustable of surfaceacidity and nature of cation.High-surface-area pillared clays (PILC) were prepared from naturally occurringmontmorillonites by exchanging interlayer ions with various cation species such as H + , Na +and Al 13-x Fe x O 40 7+ (x = 0÷2). Clay nanocomposite (CCn) was obtained based on a syntheticsmectite-type clay and MgO incorporated via surfactant stabilization to produce [1]. Theobtained PILCs and CCn were characterized by far FT-IR and DR-UV-vis spectroscopy,ESR, 27 Al NMR, scanning electron microscopy and N 2 adsorption. Acidities of PILCs werestudied by IR spectroscopy both analysing the band due to OH-vibrations and following theadsorption of carbon oxide. It was shown that the nature of pillaring agent determines texturecharacteristics and surface acidity.Na-PILC, Al 13 -PILC and CCn were used for supported of cobalt(II)-tetraphtalocyanine(Pc(SO 3 Na) 4 ). According to DR-UV-vis spectroscopy, ESR, XRD and N 2 adsorption data thestate and amount of Pc(SO 3 Na) 4 supported depend on intrinsic character of supports. Catalyticactivity of these materials was investigated in cyclohexene oxidation with H 2 O 2 and tertbutyl-hydroperoxide,and in aerobic oxidation H 2 S. It was shown that aggregation andcrystallization of Pc(SO 3 Na) 4 molecules on the surface bring to decreasing of catalytic activity.Pc(SO 3 Na) 4 dimeric form exhibits a higher catalytic activity than that of Pc(SO 3 Na) 4monomeric form.References1. A. Moronta and et. al., Clay and Clay Minerals, 53 (2005) 622.413