Comparative study of the acidic and catalytic properties of the mesoporousmaterial H-MCM-41 and zeolite H-Y

The objective of this work is to give a comparative characterization of alu minosilicate MCM-41 and zeolite Y, in particular with respect to acidity an d catalytic properties in hydrocarbon cracking. These studies are compared to a well investigated amorphous aluminosilicate, based on the fact that th e new mesoporous MCM-41 materials are a mixture of ordered material with am orphous pore walls. Characterization of differently treated MCM-41 material s and zeolite Y for comparison by Nz sorption, XRD, TPAD (Temperature Progr ammed Ammonia Desorption) with in situ FT-IR in combination with catalytic testing by MAT (Micro Activity Test) is discussed. Combination of the characterization data and the catalytic testing gives an interesting explanation of the surface properties especially in comparison with zeolite Y.