Trial Fabrication of Electrochemical Hydrogen Pump for Regulation of Hydrogen Pressure

本工作的目的是研制一种能任意调节混合气体中氢分压的电化学氢泵。为此，我们对质子导电陶瓷的氢传感器和电化学氢渗透进行了研究，并设计将两者联合收割机制成氢泵.氢泵用氢传感器：以质子导电陶瓷为固体电解质，尝试制作了适合于氢泵的各种电偶式氢传感器，确定了最佳的泵送条件.电化学渗氢试验：确定了SrCeO3基陶瓷在高温氢气气氛下的法拉第渗氢，确定了泵的最佳渗氢方式.氢气调节器的试制在上述研究结果的基础上，我们研制了一种新型的氢气调节器，它包括一个由管状SrCe_<0.95>Yb_<0.05>O_2<3-alpha>陶瓷制成的氢气泵和两个分别位于管入口和出口侧的氢气传感器.氢泵用质子导电陶瓷的研究：以CaZrO_3和SrZrO_3为基的锆酸盐陶瓷是质子导体，在高温下对一氧化碳稳定。

The aim of this work is to develop an electrochemical hydrogen pump which can regulate hydrogen partial pressure in mixed gases arbitrarily. For this purpose, we have studied on hydrogen sensor and electrochemical hydrogen permeation using a proton conducting ceramics, and devised to combine them to make hydrogen pump.1. Hydrogen sensor for hydrogen pump.Various galvanic type hydrogen sensors suitable for hydrogen pump were tried to fabricate using a proton conducting ceramic as a solid electrolyte and the best condition for pump could be determined.2. Test of electrochemical hydrogen permeation.Faradaic hydrogen permeation through SrCeo 3-based ceramics in hydrogen atmosphere at high temperature could be confirmed, and the best way for the pump was determined.3. Trial fabrication of hydrogen regulator.Based on the above described result, we could develop a new type hydrogen regulator, which consisted a hydrogen pump made of tubular type SrCe_<0.95>Yb_<0.05>O_<3-alpha> ceramic and two hydrogen sensors located on inlet and outlet side of the tube.4. Search of proton conducting ceramics for hydrogen pump.Some zirconate ceramics based on CaZrO_3 and SrZrO_3 were found to be protonic conductors which were stable against carbonmonoxide at high temperature.