Trial Fabrication of Electrochemical Hydrogen Pump for Regulation of Hydrogen Pressure

本工作的目的是研制一种可任意调节混合气体中氢气分压的电化学氢泵。为此，我们利用质子导电陶瓷对氢传感器和电化学氢渗透进行了研究，并设计了将两者结合起来制作氢泵。以质子导电陶瓷为固体电解液，尝试制作了适用于氢泵的各种电流型氢敏传感器，确定了最佳的泵浦条件。电化学氢渗透测试：确定了高温下氢气气氛下SrCeO_3基陶瓷的法拉第氢渗透，并确定了最佳泵浦方式。氢气调节器的试制。基于上述结果，我们可以开发出一种新型的氢气调节器，该氢气调节器由管状SrCe_&lt；0.95&gt；Yb_&lt；0.05&gt；O_&lt；3-alpha&gt；陶瓷制成的氢气泵和位于管子进出口侧的两个氢传感器组成。氢泵用质子导电陶瓷的研究发现，一些以CaZrO_3和SrZrO_3为基础的锆酸盐陶瓷是质子导体，在高温下对一氧化碳是稳定的。

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.