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  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Smektyty podpierane polikationami tytanowymi jako sorbenty i katalizatory w ochronie środowiska
    (Data obrony: 2014-07-25) Urbańczyk, Marcin
    Wydział Geologii, Geofizyki i Ochrony Środowiska
    Exchanging the interlayer cations with large, oligomeric titanium hydroxycations leads to increase of interlayer distance and open structure of montmorillonite. After calcination, titanium hydroxycations turn into oxide pillars. Pillared interlayer clays (PILCs) are thermally stable microporous structures with large surface area. Pillared montmorillonites exhibit unique sorption and catalytic properties in many industrially important chemical processes. Ti-PILC are very active catalysts for processes which limit the release of toxic pollutants into the atmosphere: combustion of chlorinated volatile organic compounds (CVOCs) and Selective Catalytic Reduction of nitrogen oxides by ammonia or hydrocarbons. Studies have shown that Ti-PILC sorbed a certain amount of carbon dioxide. The strength of CO2 sorption was different, what is shown as 3 peaks on graph of CO2 content. After heating of Ti-PILC (200oC) the strength of sorption increased as evidenced by the three peaks shift towards higher temperatures.