Novel Base Catalysts by Nitridation of Zeolite Y: Characterization and Catalytic Evaluation
Novel base catalysts were obtained by subjecting Y zeolites to nitridation. These materials were characterized by elemental analysis, X-ray diffraction, BET surface area analysis, In situ diffuse reflectance infrared fourier transform Spectroscopy (in situ DRIFTS), Pyrrole adsorption. The results indicated nitrogen-incorporated NaY zeolite was well ordered and possess high surface area and pore volume. In situ DRIFTS experiments confirmed that N atoms had been introduced into the framework by nitridation to form -NH2- or -NH- species. It was found that Lewis basicity of these oxynitride materials increased by the pyrrole adsorption. Furthmore, the basic catalytic properties of nitrogen-incorporated zeolites were evaluated by Knoevenagal condensation of benzaldehyde with diethyl malonate and enhanced yield of product was achieved.
Xianghua Liu, Zhengyi Jiang and Jingtao Han
G. M. Peng et al., "Novel Base Catalysts by Nitridation of Zeolite Y: Characterization and Catalytic Evaluation", Advanced Materials Research, Vols. 148-149, pp. 1096-1099, 2011