Study of Combustion of Hydrogen—Air and Hydrogen—Methane—Air Mixtures over the Palladium Metal Surface Using a Hyperspectral Sensor and High-Speed Color Filming
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The ignition temperature of the 40% H2 + air mixture in the presence of metallic palladium (70°C, 1 atm) was found to be ~200°C lower than above the platinum surface (260°C, 1 atm). In addition, Pd initiated the ignition of (30–60% H2 + 70–40% CH4)stoich + air mixtures at temperatures below 350°C, while Pt foil did not initiate the burning of these mixtures up to 450°C. The effective activation energy of ignition over Pd was evaluated to be ~3.5 kcal/mol. It was found using a hyperspectral sensor that the system of emission bands of H2O* was absent in the range 570–650 nm in the presence of leucosapphire; a possible explanation of this phenomenon was given. An explanation was proposed for the appearance of an additional source of excited water molecules emitting in the range 900–970 nm.
Key wordscombustion hydrogen–air–palladium mixture hydrogen–methane–air mixture palladium high-speed color filming hyperspectrometer
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The experimental study of combustion of hydrogen—air and hydrogen—methane—air mixtures over the surface of metallic palladium using both a hyperspectral sensor and high-speed color filming was performed within the framework of state tasks nos. AAAA-A17-117040610346-5 and AAAA-A17-117021310376-4; the results of experiments were processed within the framework of state tasks nos. AAAA-A17-117112240026-5 and AAAA-A17-117011910011-09.
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