Insight into the design and construction of Cr substituted Co-based columnar activated coke catalysts for effective and reliable removal of methylbenzene and Hg0 concurrently

Excellent Performance and Feasible Mechanism of ErOx-Boosted MnOx-Modified Biochars Derived from Sewage Sludge and Rice Straw for Formaldehyde Elimination: In Situ DRIFTS and DFT

“…The support materials derived from diverse raw materials showed distinctive surface functional groups and intrinsic pore structures in different proportions of micropores, mesopores, and macropores, which directly influenced the mass transfer and pervasion of reactants and product molecules, thus playing an imperative role in the catalytic reactions [12,62]. Figure 8 showcases the effects of the support materials from diverse precursors on HCHO removal at an identical loading and molar ratio of metal oxides at 100-380 °C.…”

“…The support materials derived from diverse raw materials showed distinctive surface functional groups and intrinsic pore structures in different proportions of micropores, mesopores, and macropores, which directly influenced the mass transfer and pervasion of reactants and product molecules, thus playing an imperative role in the catalytic reactions [12,62]. Figure 8 showcases the effects of the support materials from diverse precursors on HCHO removal at an identical loading and molar ratio of metal oxides at 100-380 • C. Throughout the entire heating process, 15%Er 0.5 Mn 0.5 /BAC exhibited a better E HCHO than 15%Er 0.5 Mn 0.5 /SAC and 15%Er 0.5 Mn 0.5 /SAW, which could be theoretically ascribed to 15%Er 0.5 Mn 0.5 /BAC neutralizing 15%Er 0.5 Mn 0.5 /SAW and 15%Er 0.5 Mn 0.5 /SAC.…”

“…As an indispensable gas component in the actual flue gas, O 2 significantly influenced the conversion of reactive oxygen species associated with the catalytic oxidation procedures of HCHO [12,32]. Figure 10 displays the influences of O 2 concentrations on HCHO elimination in 15%Er 0.5 Mn 0.5 /BAC at 220 • C. It was recognized that oxygen deficiency might impact the catalytic properties of the samples.…”

“…A series of metal oxide supports, including MnO x , TiO 2 , CeO 2 , and FeO x and their composites, such as MnO x -CeO 2 , CeO 2 -Co 3 O 4 , and In 2 O 3 -SnO 2 , have been used in a wide range of studies on catalytic HCHO due to their excellent redox effects, the high dispersity of the supported metal oxides, and the metal-support interactions (MSIs) between the supports and the supported metal oxides [9][10][11]. However, applications of these common metal oxide supports are restricted owing to certain disadvantages, such as irregular shapes, unsuitable sizes, uneven structures, and high prices [12,13]. Against this backdrop, despite their own problems, biochar supports hold potential for HCHO removal because of their low prices, adjustable sizes, large specific surface areas, excellent hydrophobicity, and rich sources [14].…”