Influence of the Synthesis Procedure and Chemical Composition on the Activity of Titanium in Ti-Beta Catalysts

Ti-Beta samples with different Ti and Al content and synthesized by different procedures have been characterized by XRD, i. r., SEM, Diffuse Reflectance Spectroscopy (DRS) in the UV-Vis region, and XPS. The catalytic activity of the samples was measured using the oxidation of 1-hexene as a test reaction. The Ti and Al content and the distribution of both elements along the crystallites of Ti-Beta was seen to affect the intrinsic activity of the Ti. The simultaneous presence of Al and Ti in the same crystal region reduces the intrinsic activity of titanium for the oxidation reaction. Moreover, it is found that the intrinsic activity of the Ti atom in Ti-Beta is lower than in TS-1.