Automatic Carbon Dioxide-Methane Gas Sensor Based on the Solubility of Gases in Water

Sensors

Raúl O. Cadena-Pereda¹  Eric M. Rivera-Muñoz³  Gilberto Herrera-Ruiz²  Domingo J. Gomez-Melendez⁴ 

[1] 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;Facultad de Ingeniería, Universidad Autónoma de Querétaro, Centro Universitario Cerro de las Campanas S/N, Querétaro 76010, Mexico; E-Mail:;Centro de Física Aplicada y Tecnología Avanzada Universidad Nacional Autónoma de México, A. P. 1-1010, Querétaro 76000, Mexico; E-Mail:;Universidad Politécnica de Querétaro, Carretera Estatal 420 S/N, El Rosario, C.P. 76240, El Marqués, Querétaro 76010, Mexico; E-Mails:

关键词: reconfigurable logic;    gas solubility;    binary gas sensor;    mathematical model;   

DOI  :  10.3390/s120810742

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.