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

作者：Cadena Pereda Raul O^*; Rivera Munoz Eric M; Herrera Ruiz Gilberto; Gomez Melendez Domingo J; Anaya Rivera Ely K

来源：Sensors, 2012, 12(8): 10742-10758.

DOI：10.3390/s120810742

• reconfigurable logic
• gas solubility
• binary gas sensor
• mathematical model

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.

• 出版日期2012-8