DEVELOPNENT OF HIGH TEMPERATURE TYPE HYOROGEN DETECTOR BY USING SOITD ELECTROLYTE

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At the chemical plants typified by oil refineries in which high pressure hydrogen gas is treated at high temperature, the hydrogen dissolves into a steel, reacts with carbon or carbide to form the methane bubble and sometimes results in the damage of steel. In order to catch such reskness in advance, the high temperature type hydrogen detector is required to develop by using solid electrolyte. From three year's project, the following results was obtained :(1) The electrolytic part of such detector was developed by using SrCeO_3 solid electrolyte covered by platinum paste.(2) The electronic part was developed by ourself not to accept any noise.(3) The long term measurement over half year was performed successfuly and was confirmed to get the reproducible hydrogen permeability and its deffusion coefficient.(4) If exess oxygen exist in surrounding it, the detector did not operate normaly due to occurrence of hole conductance in solid electrolyte. Its counterplan was considered.(5) In order to understand the reskness of damage of steel from the measured hydrogen permeability by computer, the data base was mode from the collection of published literatures.(6) It is a hope to appliy such detector to the actual plant in next stage.