Recovery of hydrogen from gas mixture by an intermediate-temperature type proton conductor
Recovery of hydrogen from gas mixture by an intermediate-temperature type proton conductor
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利用中温型质子导体从气体混合物中回收氢气
DOI：
10.1016/j.fusengdes.2010.01.007
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发表时间：
2010
影响因子：
1.7
通讯作者：
T. Ohshima
中科院分区：
文献类型：
--
作者：
M. Tanaka;T. Ohshima
在623 ~ 873 K温度范围内，采用直流电法研究了在中温质子导电率较高的单端闭管型BaZr 0.955Y 0.03Co 0.015O3 −α的电化学氢泵特性。在水蒸气电解条件下，表现出质子和电子-空穴混合导电，质子输运数下降小于0.37。另一方面，在从含有氢气的混合气体中泵氢的情况下，质子输运数达到0.85以上。然而，即使在低于700 K的较低温度下，也不仅表现出质子和电子-空穴传导，而且还表现出氧化物-离子传导。因此，观察到由氧化物离子迁移引起的电化学失效的增长。从高质子输运数和低氧离子电导的角度出发，提出了一种核聚变工程应用的候选质子导体，并与锆酸盐系列质子导体的氢泵特性进行了比较。
The characteristics of electrochemical hydrogen pump using one-end closed tube type BaZr0.955Y0.03Co0.015O3−α, which has higher proton conductivity among other zirconate series proton conductor at the intermediate temperature, were demonstrated by a direct current method in the temperature range from 623 to 873K. Under water vapor electrolysis condition, mixed proton and electron–hole conduction were exhibited and proton transport number was decreased less than 0.37. On the other hand, under hydrogen pumping from a mixture gas contained with hydrogen gas, proton transport number has attained more than 0.85. However, not only proton and electron–hole conductions but also oxide-ion conduction was exhibited even at lower temperature below 700K. Thus, the growth of electrochemical failure induced by oxide ion migration was observed. From the standpoint of high proton transport number and low oxide-ion conduction, a candidate proton conductor for nuclear fusion engineering applications was proposed to compare with hydrogen pump characteristics among the zirconate series proton conductor.