INVESTIGADORES
CANEIRO Alberto
artículos
Título:
Measurement and regulation of oxygen content in selected gases using solid electrolyte cells. IV. Accurate preparation of CO2-CO and H2O-H2 mixtures
Autor/es:
A. CANEIRO; M. BONNAT; J. FOULETIER
Revista:
JOURNAL OF APPLIED ELECTROCHEMISTRY
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 1981 vol. 11 p. 83 - 90
ISSN:
0021-891X
Resumen:
Mixtures of
CO2-CO, H2O-H2 and Ar-H2O-H2
of precise composition were prepared using a zirconia pump and analysed with a
zirconia gauge. The PCO2/PCO ratio was varied from 5×10−2 to 104
and the PH2O/PH2 ratio from 3×10−4 to 10−2. A
Faraday's Law test proved to be a simple and reliable procedure for checking
the conditions of utilization of these gaseous mixtures and for verifying that
no significant disproportionation of CO or leakage along the gas circuit
altered the prepared composition. From a practical point of view the best
methods of preparing mixtures with low oxygen activity are reduction of carbon
dioxide in the range 5×10−11 to 10−17 atm and oxidation
of inert gas-H2 in the range 10−19 to 10−27
atm at 800°C.