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

Cadena-Pereda RO, Rivera-Muñoz EM, Herrera-Ruiz G, Gomez-Melendez DJ, Anaya-Rivera EK - Sensors (Basel) (2012)

Bottom Line: 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 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.

View Article: PubMed Central - PubMed

Affiliation: Laboratorio de Biotrónica, Departamento de Investigación y Posgrado, Facultad de Ingeniería, Universidad Autónoma de Querétaro, Centro Universitario Cerro de las Campanas S/N, Querétaro 76010, Mexico. omar.cadena@upq.edu.mx

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.

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The response of the mathematical model with different quantities of absortion liquid (in moles). CH4_0 with 0 moles, CH4_2 with 2 moles, CH4_4 with 4 moles, CH4_5.148 with 5.148 moles, CH4_6 with 6 moles, CH4_8 with 8 moles and CH4_10 with 10 moles. In addition, an IDEAL plot is included for a theoretical perfect response.
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f3-sensors-12-10742: The response of the mathematical model with different quantities of absortion liquid (in moles). CH4_0 with 0 moles, CH4_2 with 2 moles, CH4_4 with 4 moles, CH4_5.148 with 5.148 moles, CH4_6 with 6 moles, CH4_8 with 8 moles and CH4_10 with 10 moles. In addition, an IDEAL plot is included for a theoretical perfect response.

Mentions: Equations (18) and (19) describe the number of moles of CO2 and CH4 dissolved in the absorption liquid at equilibrium, respectively. Equation (20) uses the data generated by Equations (18) and (19) to predict the behavior of the described device. Six responses of the mathematical model with different quantities of absorption liquid in addition to an ideal or perfect response are shown in Figure 3, where CH4_0, CH4_2, CH4_4, CH4_6, CH4_8 and CH4_10 correspond to the responses with zero, two, four, six, eight and ten moles of water, respectively. CH4_5.148 is the response with the calculated number of moles of water to be used by the device to absorb a sample of 100% CO2 and IDEAL represents the plot of a perfect response.


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

Cadena-Pereda RO, Rivera-Muñoz EM, Herrera-Ruiz G, Gomez-Melendez DJ, Anaya-Rivera EK - Sensors (Basel) (2012)

The response of the mathematical model with different quantities of absortion liquid (in moles). CH4_0 with 0 moles, CH4_2 with 2 moles, CH4_4 with 4 moles, CH4_5.148 with 5.148 moles, CH4_6 with 6 moles, CH4_8 with 8 moles and CH4_10 with 10 moles. In addition, an IDEAL plot is included for a theoretical perfect response.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3472854&req=5

f3-sensors-12-10742: The response of the mathematical model with different quantities of absortion liquid (in moles). CH4_0 with 0 moles, CH4_2 with 2 moles, CH4_4 with 4 moles, CH4_5.148 with 5.148 moles, CH4_6 with 6 moles, CH4_8 with 8 moles and CH4_10 with 10 moles. In addition, an IDEAL plot is included for a theoretical perfect response.
Mentions: Equations (18) and (19) describe the number of moles of CO2 and CH4 dissolved in the absorption liquid at equilibrium, respectively. Equation (20) uses the data generated by Equations (18) and (19) to predict the behavior of the described device. Six responses of the mathematical model with different quantities of absorption liquid in addition to an ideal or perfect response are shown in Figure 3, where CH4_0, CH4_2, CH4_4, CH4_6, CH4_8 and CH4_10 correspond to the responses with zero, two, four, six, eight and ten moles of water, respectively. CH4_5.148 is the response with the calculated number of moles of water to be used by the device to absorb a sample of 100% CO2 and IDEAL represents the plot of a perfect response.

Bottom Line: 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 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.

View Article: PubMed Central - PubMed

Affiliation: Laboratorio de Biotrónica, Departamento de Investigación y Posgrado, Facultad de Ingeniería, Universidad Autónoma de Querétaro, Centro Universitario Cerro de las Campanas S/N, Querétaro 76010, Mexico. omar.cadena@upq.edu.mx

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.

Show MeSH
Related in: MedlinePlus