Title :
Development of Methanol Sensor Using SH-SAW Sensor for Direct Methanol Fuel Cell
Author :
Kondoh, Jun ; Tabushi, Shouhei ; Matsui, Yoshikazu
Author_Institution :
Shizuoka Univ., Hamamatsu
Abstract :
A methanol sensor for direct methanol fuel cell (DMFC) is required. A shear horizontal surface acoustic wave (SH-SAW) sensor for electrical property detection is applied for it. The operative temperature of DMFC is above 50degC. The wave propagation characteristics are calculated with considering temperature coefficient. The results indicate that the sensitivity increases with the temperature. Methanol solutions are measured using the SH-SAW sensor. Linear relationships between the sensor response and concentration were obtained. Also, the increase of the sensitivity is experimentally confirmed. As a formic acid is produced in DMFC, mixture solutions of methanol and formic acid were measured. Using coordinate transformation, it is possible to estimate methanol concentration in mixture solution.
Keywords :
acoustic wave propagation; chemical sensors; direct methanol fuel cells; organic compounds; surface acoustic wave sensors; SH-SAW sensor; direct methanol fuel cell; electrical property detection; methanol sensor; shear horizontal surface acoustic wave; wave propagation; Acoustic measurements; Acoustic propagation; Acoustic sensors; Acoustic signal detection; Acoustic waves; Fuel cells; Methanol; Sensor phenomena and characterization; Surface acoustic waves; Temperature sensors;
Conference_Titel :
Sensors, 2006. 5th IEEE Conference on
Conference_Location :
Daegu
Print_ISBN :
1-4244-0375-8
Electronic_ISBN :
1930-0395
DOI :
10.1109/ICSENS.2007.355598
