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Natural gas leakage, mainly ethane, and methane, are potent greenhouse gases and significant contributors to climate change. This study proposes utilizing a broadband supercontinuum laser (SCL) to measure ethane (C2H6) and methane (CH4) absorption characteristics in the near-infrared range. The SCL is guided through hollow core waveguides (HCW). The approach utilizes Direct Absorption Spectroscopy, which involves measuring the absorption of specific wavelengths of light by the target gas. A hollow core waveguide of length 10 m is used for measurements. The system provides a minimum detection limit (MDL) of 30 and 23 ppm for C2H6 and CH4 in the 2.3 and 1.65 µm wavelength range, respectively, with a signal-to-noise ratio (SNR) of 3 dB. The suggested method permits real-time monitoring of gas pipelines, allowing prompt maintenance to prevent catastrophic failures.

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Multigas Monitoring Using Hollow Core Waveguide

  • 会议论文

  • 发表日期：

    2025年

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  • Vivek Bargate,
  • Ramya Selvaraj,
  • R. N. Patel,
  • K. Saran Kumar,
  • Nilesh J. Vasa

摘要

Natural gas leakage, mainly ethane, and methane, are potent greenhouse gases and significant contributors to climate change. This study proposes utilizing a broadband supercontinuum laser (SCL) to measure ethane (C2H6) and methane (CH4) absorption characteristics in the near-infrared range. The SCL is guided through hollow core waveguides (HCW). The approach utilizes Direct Absorption Spectroscopy, which involves measuring the absorption of specific wavelengths of light by the target gas. A hollow core waveguide of length 10 m is used for measurements. The system provides a minimum detection limit (MDL) of 30 and 23 ppm for C2H6 and CH4 in the 2.3 and 1.65 µm wavelength range, respectively, with a signal-to-noise ratio (SNR) of 3 dB. The suggested method permits real-time monitoring of gas pipelines, allowing prompt maintenance to prevent catastrophic failures.