CO2 monitoring by solid-state limiting-current sensors

✍ Scribed by Dario Narducci; Luca Facheris; Claudio M. Mari

• Book ID: 103961284
• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 259 KB
• Volume: 25
• Category: Article
• ISSN: 0925-4005
• DOI: 10.1016/0925-4005(95)85140-2

✦ Synopsis

The aim of this contribution is to present some results on CO* determination in N2/C02 gas mixtures. The sensor under investigation is a zirconia (solid-electrolyte) electrolysis cell operating in a limiting-current mode. The diffusion of the gaseous species to the reduction electrode is limited by a pinhole in a pellet sealed to the cathodic side of the cell. The experiments are carried out as a function of CO, concentration and temperature. It is found that the limiting current depends on the CO, partial pressure, as theoretically predicted. The possibility of determining CO, in nitrogen in a wide range of concentrations is confirmed.