Catalytic combustion of methane

Catalytic combustion of methane by perovskite-type oxide nanoparticles as pollution prevention strategy

“…The lower catalytic activity of the higher Sr-substituted perovskite is due to the structural and valece changes, leading to lower reductin/oxidation capability from the relative rate of dissociation and bulk diffusion of oxide ions [32]. Since the initial stage of the sigmoidal curve is related to a kinetically controlled regime [30,33], the rate of methane combustion was calculated from the conversion values lower than 20% accordingly with equation r = (F gas · X CH4 ) / (V ST P · m cat ), where r(mol·s −1 ·g −1 ) is the reaction rate, F gas (L·s −1 ) is the inlet flow of reactants in, X CH4 is the fractional conversion, V ST P (22.414 L·mol −1 ) is the volume occupied by one mole of gas at Standard Temperature and Pressure condition, m cat (g) is the mass of catalyst. Reaction rates were reported in the Arrhenius plot of fig.12 and the apparent activation energies, E a , for CH 4 disappearance were calculated from the slope of the interpolated data.…”

System Study of Rich Catalytic/Lean burn (RCL) Catalytic Combustion for Natural Gas and Coal-Derived Syngas Combustion Turbines

“…For methane oxidation under fuel-lean conditions, however, only Pd-based catalysts are currently practical, because only they offer acceptable activity, lightoff temperature, and resistance to volatilization [1][2][3]. Unfortunately Pd-PdO catalyst morphology and its reactions with methane are complex, and lead to complex behaviors such as deactivation at high temperature (above about 750 C / 1380 F), hysteresis in reaction rate over heating and cooling cycles [4][5][6][7], and oscillations in activity and temperature [8][9][10][11].…”

“…In support of assessing the potential benefit and costs and to help provide a roadmap for development, the system study was directed to (1) provide an assessment of the RCL technology and its operating map, (2) assess the fit of the technology with existing DLE technology, and (3) provide a benefit/cost analysis of the technology for public policy purposes.…”

“…To help provide information for policy decisions and a roadmap for development, the system study provides (1) an assessment of the RCL technology and its operating map, (2) an assessment of the fit of the technology with existing DLE technology, and (3) an analysis of benefits and costs. These results are summarized below:…”

Ammonium hydroxide addition and its influence on the catalytic activities of Pt-based catalysts for methane oxidation

“…On the other hand, methane oxidation process may generate some energy [1,2]. Catalysts play an important role in catalytic reaction, including in oxidation.…”