ELEMENT FOR REMOVING NOX AND NOX REMOVING METHOD

摘要

PROBLEM TO BE SOLVED: To provide an element for removing NOxand a NOxremoving method reducing power consumption by making the element for removing NOxhaving a high diffusing capacity of an oxygen ion.

SOLUTION: The element for removing NOxcomprises a substrate 1 comprising a solid electrolyte, capable of retaining the oxygen ion in the inside of a bonding structure of atoms to each other and exhibiting a conductivity by movement of the oxygen ion itself by application of a voltage; and a positive electrode 3 and a negative electrode 2 formed on a surface of a substrate. The oxygen ion is drawn out from NOxin an atmosphere to reduce it to N2in the negative electrode 2, and the drawn out oxygen ion is released from the positive electrode 3 as oxygen. Since the movement of the oxygen ion in the substrate 1 is not the indirect movement through lattice defect but the direct movement of the oxygen ion itself, required energy is small.

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