Hydrogen extraction characteristics of high-temperature proton conductor ceramics for hydrogen isotopes purification and recovery
Hydrogen extraction characteristics of high-temperature proton conductor ceramics for hydrogen isotopes purification and recovery
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氢同位素提纯回收用高温质子导体陶瓷的提氢特性
DOI：
10.1016/j.fusengdes.2014.04.078
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发表时间：
2014
影响因子：
1.7
通讯作者：
Lil Yang
中科院分区：
文献类型：
--
作者：
Tirui Xia;Changshu He;Hongguang Yang;W. Zhao;Lil Yang
为开发聚变堆氚提取系统中高效、经济的氢同位素纯化和回收工艺，研究了高温质子导体电化学氢泵的氢提取特性。氢在质子导体中传输的驱动力是电位差，它可以从具有低压氢同位素气体的固体增殖包层吹扫气体中选择性地提取氢同位素。在实验中，开发了由质子传导陶瓷CaZr0.9In0.1O3−α（有效电极面积：160 cm 2）制成的一端封闭管，因为它在一系列钙钛矿型质子导体中具有高的化学稳定性，机械强度和耐久性。在923 ~ 1073 K温度范围内，通过提取664-1200 ppm的H_2并平衡He，在3.5 V直流电压下，以法拉第定律从He和H_2的混合物中选择性地提取H_2，评价了H_2的抽氢特性。在1023 K和1.15 V DC条件下，He与0.12%H2的最大析氢速率为0.12 ml/min，氢回收率大于99%，表明可以在电流效率接近1的情况下操作。对氢泵在CIPITISE TES中的可能应用进行了估算。
To develop high-efficiency and economical hydrogen isotope purification and recovery processes for a tritium extraction system in a fusion reactor, hydrogen extraction characteristics of an electrochemical hydrogen pump using high-temperature proton conductors were studied. The driving forces of hydrogen transportation in the proton conductors are electric potential difference, which can extract hydrogen isotopes selectively from a solid breeder blanket purge gas with low-pressure hydrogen isotope gas. In the experiments, a one-end closed tube made of proton-conducting ceramic CaZr0.9In0.1O3−α(effective electrode area: 160 cm2) was developed because of its high chemical stability, mechanical strength, and durability in a series of perovskite-type proton conductors. The hydrogen pumping characteristics were evaluated over the temperature range from 923 K to 1073 K by extraction of 664–1200 ppm H2balanced with He, H2was selectively extracted from and the mixture of He and H2at the rate of Faraday's Law under an applied voltage of 3.5 V DC. In the case of He with 0.12% H2at 1023 K and at 1.15 V DC, the maximum hydrogen evolution rate was 0.12 ml/min, the hydrogen recovery efficiency was more than 99%, suggesting the extraction of hydrogen could be operated with a current efficiency close to unity. The possible application of hydrogen pumps for the TES of CIPITISE at CIAE has been estimated.