Measuring methanol concentrations in a vapor-fed direct methanol fuel cell using laser absorption spectroscopy

Jinhwa Chung, Sungmoo Heo, Soonho Song, Jinho Kim, Sangkyun Kang, Kyoung Hwan Choi

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Gas-phase absorption spectroscopy using a 3.39 μm He-Ne laser enables the concentration of methanol vapor in a vapor-fed direct methanol fuel cell (DMFC) to be measured in real-time and in situ once high noise levels of the laser are corrected. The changes that methanol vapor concentrations bring to cell performance can be measured under various galvanostatic and potentiostatic conditions and analyzed with regard to methanol crossover and methanol transport capability. The absorption coefficient of +methanol vapor, 0.005336 cm -1 Torr-1, is nearly constant under the DMFC operating conditions at a wavelength of 3.39 μm.

Original languageEnglish
Pages (from-to)B320-B326
JournalJournal of the Electrochemical Society
Issue number3
Publication statusPublished - 2010 Feb 16


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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