CAJ | 학술논문

混合导体固体透氧膜与POM制氢工艺相耦合,可以较大幅度地降低制氢成本.由于透氧膜在高温、强还原性气氛下工作,仅仅具有较高的透氧能力并不能满足实际应用需求,还必须具有较高的化学稳定性.通过O_2-TPD,CO_2-TG及透氧实验研究了两种透氧能力最高的膜材料BaCo_(0.7)Fe_(0.2)Nb_(0.1)O_(3-δ)及Ba_(0.5)Sr_(0.5)Co_(0.8)Fe_(0.2) O_(3-δ)研究发现,由于Ba_(0.5) Sr_(0.5)Co_(0.8) Fe_(0.2)O_(3-δ)钙钛矿中A位的Sr~(2+)被Ba~(2+)取代及B位的Co~(4+)部分被Nb~(5+)取代,有效地提高了BaCo_(0.7)Fe_(0.2) Nb_(0.1) O_(3-δ)钙钛矿材料的化学稳定性.
혼합도체고체투양막여POM제경공예상우합,가이교대폭도지강저제경성본.유우투양막재고온、강환원성기분하공작,부부구유교고적투양능력병불능만족실제응용수구,환필수구유교고적화학은정성.통과O_2-TPD,CO_2-TG급투양실험연구료량충투양능력최고적막재료BaCo_(0.7)Fe_(0.2)Nb_(0.1)O_(3-δ)급Ba_(0.5)Sr_(0.5)Co_(0.8)Fe_(0.2) O_(3-δ)연구발현,유우Ba_(0.5) Sr_(0.5)Co_(0.8) Fe_(0.2)O_(3-δ)개태광중A위적Sr~(2+)피Ba~(2+)취대급B위적Co~(4+)부분피Nb~(5+)취대,유효지제고료BaCo_(0.7)Fe_(0.2) Nb_(0.1) O_(3-δ)개태광재료적화학은정성.
Coupling with the dense mixed conducting oxygen-permeation membrane,the cost of producing hydrogen using POM method can be reduced.However,since membrane is used in high-temperature applications under strong reductive atmosphere,ability of the oxygen-permeation and chemical stability is especially needed.Calculation on lattice parameters and the corresponding trials through O_2-TPD,CO_2-TG and oxygen-permeation experiments implies that Sr~(2+) is substituted on A site by Ba~(2+),and doping Nb~(5+) on B site in perovskite lattice Can effectively improve chemical stability of the perovskite membrane.