Numerical Simulation of a Mist Singlet Oxygen Generator.

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  • Endo Masamori
    Department of Physics, School of Science, Tokai University, 1117 Kita-Kaname, Hiratsuka, Kanagawa 259-1292, Japan
  • Muto Shigeki
    Department of Physics, School of Science, Tokai University, 1117 Kita-Kaname, Hiratsuka, Kanagawa 259-1292, Japan
  • Fujioka Tomoo
    Department of Physics, School of Science, Tokai University, 1117 Kita-Kaname, Hiratsuka, Kanagawa 259-1292, Japan
  • Nanri Kenzo
    Department of Physics, School of Science, Tokai University, 1117 Kita-Kaname, Hiratsuka, Kanagawa 259-1292, Japan

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A numerical simulation code for a mist singlet oxygen generator (SOG) is developed. Unlike previous SOGs, a mist SOG utilizes fine droplets of basic hydrogen peroxide (BHP) to achieve a stoichiometric reaction with chlorine gas in a single pass through a reaction zone. The numerical model presented in the present paper deals with the depletion of superficial HO2- density and the diffusive redistribution of each droplet, water evaporation, temperature variation of the droplet due to chemical reaction and evaporation, and heat exchange between the gas and liquid phases. Under identical initial conditions, the calculated results are consistent with the results from previous experiments. The heterogeneous quenching probability of O2(1Δ) to the BHP surface (γ) was determined by a comparison between the experimental and calculated results, and was found to be 2 × 10-3. The process conditions were then varied to establish the theoretical limit of BHP utilization. For a very small (15 μm) droplet diameter, it was shown that 50% BHP could be utilized with an output of 64% O2(1Δ) yield and 88% Cl2 utilization.

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