Promotional removal of HCHO from simulated flue gas over Mn-Fe oxides modified activated coke

Co-blending modification of activated coke using pyrolusite and titanium ore for low-temperature NOx removal

“…The Fe 2p 3/2 profile has three overlapping peaks at 710.8, 713.1, and 718.7 eV, which are assigned to the Fe 3+ bonded with hydroxyl (OH) 39,40 . The Mn 2p 3/2 profiles have three overlapping peaks corresponding to Mn 4+ (644.1 eV), Mn 3+ (642.5 eV), and Mn 2+ (640.9 eV) 12,40 . Two peaks at 464.8 eV (Ti 2p 3/2 ) and 459.1 eV (Ti 2p 1/2 ) were obtained with a 5.7 eV spin-orbital-splitting belong to the rutile TiO 2…”

“…Carbonaceous materials, such as activated carbon 8 , 9 , carbon nanotube 10 , biochar/biocarbon 11 , et al have been attracting considerable interest in the field of air pollution control. The use of activated coke (AC)-based catalyst, in particular, has good potential for industrial application due to its relatively low cost and excellent adaptability 12 . To improve the reaction activity, integration of AC with transition metals has been studied 13 , 14 , and some of them observed good NH 3 -SCR performance 14 – 16 .…”

“…To improve the reaction activity, integration of AC with transition metals has been studied 13 , 14 , and some of them observed good NH 3 -SCR performance 14 – 16 . However, most of the AC-based catalysts were prepared by the impregnation method, and this method can use only soluble transition metal salts with a relatively low decomposition temperature as precursor 12 , 17 . The catalyst preparation is complicated and high-cost, which restrain its wide application.…”

Formaldehyde Oxidation on Pd/TiO2 Catalysts at Room Temperature: The Effects of Surface Oxygen Vacancies

“…In comparison, catalytic oxidation is widely recognized to be the promising method because HCHO oxidation could be effectively decomposed into harmless CO 2 and H 2 O without any secondary pollution [6]. For decades, metal oxide catalysts (Ag, Mn, Co and Ni) [7][8][9][10][11][12][13][14][15][16] and supported noble metal (Pt, Au, Pd, Ir, Rh) catalysts [17][18][19][20][21] were attracting attention of researchers for HCHO oxidation. The former usually needed higher reaction temperature to completely decompose HCHO, while the later had shown excellent performance in HCHO oxidation at room temperature and thus was considered to be more suitable for indoor HCHO elimination.…”

Promotion effect of urchin-like MnOx@PrOxhollow core–shell structure catalysts for the low-temperature selective catalytic reduction of NO with NH3

“…It was conrmed that the Mn 4+ species and their oxidation-reduction processes were in favor of the low-temperature NH 3 -SCR reaction. 44,[47][48][49] As a result, with more Mn 4+ species, the lowtemperature catalytic activity of the catalyst was enhanced. Furthermore, it was worth noting that the concentrations of Mn signicantly decreased aer the coating with a PrO x shell, which suggested that most of the Mn species were covered by PrO x .…”