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Abstract <p>The paper presents the results of a study on the effect of diluting methane with hydrogen on the electrochemical properties of a flame. Both diffusion flames and the combustion of a premixed mixture in a Bunsen burner were considered. It has been established that for mixtures with a mole fraction of methane in the fuel exceeding 40%, the electric current value depends linearly on the methane content. When the mole fraction of methane in the mixture is less than 40%, dilution with hydrogen causes this dependence to become nonlinear. The transition boundary from a linear to a nonlinear relationship between the magnitude of the current and the amount of methane in the fuel mixture does not depend on the flow velocity, the shape of the electrodes, or the combustion mode (diffusion, premixed fuel–air mixture). The registration of CH* radical chemiluminescence demonstrates a similar dependence of the flame emission intensity on the volumetric fraction of methane in the fuel.</p>

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Effect of Hydrogen on Electrochemical Properties of Methane–Air Flame

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • V. A. Arbuzov,
  • E. V. Arbuzov,
  • Yu. N. Dubnishchev,
  • O. S. Zolotukhina,
  • V. V. Lemanov,
  • V. V. Lukashov,
  • A. V. Tupikin,
  • K. A. Sharov

摘要

Abstract

The paper presents the results of a study on the effect of diluting methane with hydrogen on the electrochemical properties of a flame. Both diffusion flames and the combustion of a premixed mixture in a Bunsen burner were considered. It has been established that for mixtures with a mole fraction of methane in the fuel exceeding 40%, the electric current value depends linearly on the methane content. When the mole fraction of methane in the mixture is less than 40%, dilution with hydrogen causes this dependence to become nonlinear. The transition boundary from a linear to a nonlinear relationship between the magnitude of the current and the amount of methane in the fuel mixture does not depend on the flow velocity, the shape of the electrodes, or the combustion mode (diffusion, premixed fuel–air mixture). The registration of CH* radical chemiluminescence demonstrates a similar dependence of the flame emission intensity on the volumetric fraction of methane in the fuel.