SO_xgas sensor and method of measuring concentration of SO_xgas

摘要

An SOx gas sensor includes a first solid electrolyte member composing a part of a wall of a gas reduction chamber and provided with a first gas introducing hole for introducing sample gas into the gas reduction chamber, an oxidation part for oxidizing noise gas other than the SOx gas in the sample gas, and a reduction mechanism for reducing the SOx gas in the sample gas, in the gas reduction chamber; a communication unit provided with a second gas introducing hole for introducing the sample gas into a gas measurement chamber from the gas reduction chamber; and a second solid electrolyte member composing a part of a wall of the gas measurement chamber and provided with an oxidation mechanism for oxidizing the SOx gas, and a measurement mechanism for measuring the concentration of the SOx gas, in the gas measurement chamber.

主权项

1. An SOx gas sensor comprising:
a gas reduction chamber in which SOx gas included in sample gas is reduced; a gas measurement chamber in which the concentration of the reduced SOx gas generated in the gas reduction chamber is measured while the reduced SOx gas is being oxidized; a first solid electrolyte composing a part of a wall of the gas reduction chamber and provided with
a first gas introducing hole for introducing the sample gas into the gas reduction chamber,an oxidation part made of a material including an oxidation catalyst and provided in the first gas introducing hole for oxidizing noise gas other than the SOx gas included in the sample gas, anda reduction mechanism including a first electrode and a second electrode provided on the first solid electrolyte for reducing in the gas reduction chamber the SOx gas included in the sample gas after oxidation by the oxidation part; a communication unit provided between the gas reduction chamber and the gas measurement chamber to partition the gas reduction chamber and the gas measurement chamber and provided with
a second gas introducing hole for introducing the reduced SOx gas into the gas measurement chamber from the gas reduction chamber, anda gas diffusion resistor provided in the second gas introducing hole; and a second solid electrolyte composing a part of a wall of the gas measurement chamber and provided with
an oxidation mechanism including a third electrode and a fourth electrode provided on the second solid electrolyte for oxidizing in the gas measurement chamber the reduced SOx gas generated in the gas reduction chamber, anda measurement mechanism including a measurement electrode provided on the second solid electrolyte for measuring the concentration of the reduced SOx gas introduced into the gas measurement chamber from the gas reduction chamber and being oxidized in the gas measurement chamber.