Lean methane catalytic combustion over the mesoporous MnOx-Ni/MgAl2O4 catalysts: Effects of Mn loading

AOx–MnOx (A = Ni, Cu, Fe, or Co) Nanocatalysts Fabricated by the Mechanochemical Preparation Method for Lean Methane Catalytic Combustion Assisted by a DBD Plasma Reactor

“…On the other side, the internal and external mass transfers largely depend on the catalyst properties (such as size, volume, and diffusion) and residence time (i.e., feed flow rate), respectively . Based on the reports, increasing the reactant’s velocity does not remarkably affect the CH 4 conversion rate at a steady-state condition . In this study, the effect of GHSV was evaluated by holding the O 2 /CH 4 ratio constant at 6:1.…”

“…The effect of feed ratio (O 2 /CH 4 ) on the CH 4 conversion of the selected catalyst was also surveyed, and the outcome curves are shown in Figure b. However, the change in the feed ratio could alter the state of CH 4 or O 2 , which could influence the product selectivity and reaction mechanism. , The light-off temperature also depends on the feed ratio. In this analysis, the MCC process was carried out at various feed ratios (O 2 /CH 4 = 2:1, 4:1, 6:1, and 8:1) and a constant GHSV value of 24 000 mL·h –1 ·g cat –1 at 350 °C.…”

“…Moreover, the identified peaks at 2θ = 30. 40 . It can be observed that the diffraction peaks were intensified by increasing the copper oxide contents, illustrating the particle agglomeration and sintering of the active phase in the samples with higher CuO loadings.…”

“…39 Based on the reports, increasing the reactant's velocity does not remarkably affect the CH 4 conversion rate at a steady-state condition. 40 In this study, the effect of GHSV was evaluated by holding the O 2 /CH 4 ratio constant at 6:1.…”

Recent advances and future challenges in the catalytic combustion of light hydrocarbon VOCs

“…Transition metal-supported catalysts, such as Co-supported catalysts, 114–120 Mn-supported catalysts, 121–123 and Ni-supported catalysts, 124–127 are widely used for the catalytic combustion of light hydrocarbons. Among them, cobalt oxides are often used as active components due to their superior low-temperature reducibility and strong oxygen activation ability, which are considered one of the alternative candidates to noble metal-supported catalysts.…”