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Removal of NO by catalytic decomposition of vaporized H 2 O 2 over Mo–Fe / TiO 2 catalyst
Author(s) -
Xiong Weicheng,
Pu Ge,
Chen Jiashan,
Wang Pengcheng
Publication year - 2021
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.6639
Subject(s) - catalysis , electron paramagnetic resonance , chemistry , decomposition , x ray photoelectron spectroscopy , radical , atmospheric temperature range , fourier transform infrared spectroscopy , inorganic chemistry , oxygen , sulfur , nuclear chemistry , desorption , analytical chemistry (journal) , chemical engineering , adsorption , organic chemistry , nuclear magnetic resonance , physics , meteorology , engineering
Abstract BACKGROUD A series of Mo–Fe/TiO 2 catalysts were employed for the catalytic decomposition of vaporized H 2 O 2 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. RESULTS The experiment results revealed that the 1.5%Mo–0.5%Fe/TiO 2 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/TiO 2 catalyst after the introduction of SO 2 , 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 SO 2 . CONCLUSIONS This study illustrated that Mo–Fe/TiO 2 catalysts showed excellent catalytic activity in the low‐temperature range and resistance to SO 2 . Such catalysts are very promising in the application of flue gas denitrification in industrial furnaces. © 2020 Society of Chemical Industry