Removal of NO by catalytic decomposition of vaporized H2O2 over Mo–Fe/TiO2 catalyst

Abstract

AbstractBACKGROUDA series of Mo–Fe/TiO2 catalysts were employed for the catalytic decomposition of vaporized H2O2 to remove nitric oxide in the low‐temperature range (80–160 °C). The experimental results and the physicochemical properties were evaluated using a variety of techniques.RESULTSThe experiment results revealed that the 1.5%Mo–0.5%Fe/TiO2 catalyst exhibited the best catalytic activity and 97.6% NO removal efficiency was obtained at 80 °C. The formation of •OH radicals and oxygen vacancies was verified using electron paramagnetic resonance (EPR). The results of X‐ray photoelectron spectroscopy and EPR proved the importance of oxygen vacancies in the generation of •OH radicals. In addition, the results revealed the great stability of the 1.5%Mo–0.5%Fe/TiO2 catalyst after the introduction of SO2, which proved the sulfur resistance of the catalyst. Finally, the fresh and spent catalysts were characterized using X‐ray diffraction and Fourier transform infrared spectroscopy. The sulfur resistance was also verified using temperature‐programmed desorption of SO2.CONCLUSIONSThis study illustrated that Mo–Fe/TiO2 catalysts showed excellent catalytic activity in the low‐temperature range and resistance to SO2. Such catalysts are very promising in the application of flue gas denitrification in industrial furnaces. © 2020 Society of Chemical Industry