Study of Combustion of Hydrogen—Air and Hydrogen—Methane—Air Mixtures over the Palladium Metal Surface Using a Hyperspectral Sensor and High-Speed Color Filmingстатья
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Дата последнего поиска статьи во внешних источниках: 24 июля 2019 г.
Аннотация: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.