Automatic carbon dioxide-methane gas sensor based on the solubility of gases in water

  • Cadena-Pereda R
  • Rivera-Muñoz E
  • Herrera-Ruiz G
 et al. 
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Abstract

Biogas methane content is a relevant variable in anaerobic digestion processing where knowledge of process kinetics or an early indicator of digester failure is needed. The contribution of this work is the development of a novel, simple and low cost automatic carbon dioxide-methane gas sensor based on the solubility of gases in water as the precursor of a sensor for biogas quality monitoring. The device described in this work was used for determining the composition of binary mixtures, such as carbon dioxide-methane, in the range of 0-100%. The design and implementation of a digital signal processor and control system into a low-cost Field Programmable Gate Array (FPGA) platform has permitted the successful application of data acquisition, data distribution and digital data processing, making the construction of a standalone carbon dioxide-methane gas sensor possible.

Author-supplied keywords

  • Binary gas sensor
  • Gas solubility
  • Mathematical model
  • Reconfigurable logic

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Authors

  • Eric Rivera-MuñozUniversidad Nacional Autonoma de Mexico, Centro de Fisica Aplicada y Tecnologia Avanzada

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  • Raúl O. Cadena-Pereda

  • Gilberto Herrera-Ruiz

  • Domingo J. Gomez-Melendez

  • Ely K. Anaya-Rivera

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