Facile synthesis of Mn-based nanobelts with high catalytic activity for selective catalytic reduction of nitrogen oxides

SO2 promoted in situ recovery of thermally deactivated Fe2(SO4)3/TiO2 NH3-SCR catalysts: From experimental work to theoretical study

“…After exposure to SO2 and O2 for 30 min, bands at 1370, 1298 and 1170 cm −1 were observed. The bands at 1370 and 1298 cm −1 were indicative of the asymmetric vibrations of surface sulfate species with covalent O]S]O [11,56]. The band at 1170 cm −1 was indicative of bulk sulfate species [11], suggesting that both surface and bulk sulfate species were formed in the presence of SO2 and O2.…”

“…Nevertheless, it is vitally important that novel vanadium-free SCR catalysts are developed because of the bio-logical toxicity of vanadium-based catalysts and their undesirable ac-tivity for SO2 oxidation [8][9][10]. There are numerous examples of transition metal (e.g., Mn, Ce, Fe, and Cu) oxide catalysts which are highly active for NH3-SCR [11][12][13][14]. However, in many cases these catalysts are exceptionally susceptible to deactivation in the presence of SO2 (a common component in flue gas), which has greatly limited the application of these vanadium-free catalysts [15][16][17][18].…”

Studies on the Selection of a Catalyst–Oxidant System for the Energy-Efficient Desulfurization and Denitrogenation of Fuel Oil at Mild Operating Conditions

“…Interestingly, ILs ranked higher at all experimental conditions in terms of DBT and pyridine conversion as compared to pristine Co–Mo/Al 2 O 3 and Ni–Mo/Al 2 O 3 catalysts, which could be attributed to the strong extractive and catalytic power of ILs than mere oxidative desulfurization activity of these catalysts. Mn-decorated catalysts (Mn–Co–Mo/Al 2 O 3 and Mn–Ni–Mo/Al 2 O 3 ) exhibited higher DBT and pyridine conversion, which could be accredited to the ideal chemistry between the Mn active phase and H 2 O 2 than between IL and H 2 O 2 .…”

Modification of micro/nanoscaled manganese dioxide-based materials and their electrocatalytic applications toward oxygen evolution reaction

“…a-MnO 2 nanobelts also showed a promising selective catalytic reduction with high NO conversions and a wide operating temperature window. 123 Sinha et al 124 found that d-MnO 2 nanosheets could transform into a-MnO 2 nanowires via an ozone-assisted hydrothermal method due to dissolution-recrystallization. The synthesized a-MnO 2 nanowires were used for the hydrolysis of benzonitrile to benzamide.…”