PORE STRUCTURE CHARACTERIZATION OF Al-, Cr-PILLARED AND Cr- INCORPORATED Al-PILLARED CLAYS BY DFT AND DR ANALYSIS

16595

Al-pillared clay (Al-PILC), mixed-Cr/Al PILCs (CrAl033-PILC, CrAl1-PILC) and Cr-pillared clay (Cr- PILC) were synthesized using bentonite clay from the Hançılı region in Turkey. Metal yerleştirilmiş sütunlu kil örneklerinin sıvı azot sıcaklığındaki N2 adsorpsiyon/desorpsiyon izotermleri elde edilmiş ve izoterm verileri kullanılarak gözenek yapıları ile belirlenmiştir. Adsorption and desorption isotherms of N2 at the temperature of liquid nitrogen of the metal-incorporated PILC samples were obtained and by using isotherm data, pore structures were determined by Density Functional Theory (DFT) and Dubinin-Radushkevich (DR) methods. It was observed that The Density Functional Theory (DFT) model was consistent with the experimental data for metal-incorporated pillared clay samples. The most DFT and DR micropore volume values were obtained for CrAl033-PILC calcined at 573 K as and 0.080 cm³g^-1 and 0.138 cm³g^-1. It was shown that micropore volume values obtained by DR method are consistent with the ones determined by SF method.

631

Cr incorporated Al , pillared clays , pore structure , DFT method , DR method

Journal Of The Faculty Of Engineering an‎d Architecture Of Gazi University

640

Journal Of The Faculty Of Engineering an‎d Architecture Of Gazi University