Vanadium-titanium oxide system in β-picoline oxidation

摘要: Publisher Summary There is sizeable interest in the study of vanadium–titanium oxide catalysts for selective oxidation organic compounds. This chapter discusses vanadium–titania to be also effective 13-picoline nicotinic acid. The describes on influence chemical composition system phase composition, structural arrangement, and catalytic behavior β-picoline oxidation. In this purpose, binary samples, containing 5 75 wt % V2O5 95 25 TiO2, were prepared by mixing titania anatase modification produced according sulfate technology, with vanadyl oxalate solution, drying mixture, calcining it at 450°C. Individual oxides from corresponding raw materials same manner. Thermal argon adsorption was used determine specific surface area samples. X-ray diffraction (XRD) analysis carried out, using a URD-6 diffractometer monochromatic CuKα radiation. IR spectra recorded 200 1300 cm−1, BOMEM Fourier-spectrometer. Weighed 2 mg catalyst studied pelleted pressing CsJ. Transmission electron microscopy  (TEM) studies JEM-4000FX microscope resolution 1.1 A, accelerating potential 400 kV. Catalytic activity 0.25–0.50 mm fraction measured, flow circuit setup, differential reactor 250–300°C. inlet reaction mixture 1 vol 13-picoline, 20 oxygen, 30 water steam, balance nitrogen; contact time 0.15–3.00 s. products analyzed chromatographically. Chemical area, examined are discussed chapter. From physicochemical data, found differ XRD microstructure, molecular structure depending concentration vanadium oxide.