BaCo_(0.7)Fe_(0.2)Nb_(0.1)O_(3-δ)钙钛矿型混合导体透氧膜的性能  

Properties of BaCo_(0.7)Fe_(0.2)Nb_(0.1)O_(3-δ) Perovskite-Type Mixed Conducting Oxygen-Permeation Membrane

作　　者：黄少卿[1] 丁伟中[1] 沈培俊[1] 杨志彬[1] 周宇鼎[1] 张玉文[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《上海大学学报（自然科学版）》2010年第1期43-47,共5页Journal of Shanghai University:Natural Science Edition

基　　金：国家高技术研究发展计划(863计划)资助项目(2006BA103A05);上海市科委重点科研资助项目(06DZ12212);先进钢铁材料技术国家工程研究中心资助项目(中050209)

摘　　要：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O2-TPD,CO2-TG及透氧实验研究了两种透氧能力最高的膜材料BaCo0.7Fe0.2Nb0.1O3-δ及Ba0.5Sr0.5Co0.8Fe0.2O3-δ.研究发现,由于Ba0.5Sr0.5Co0.8Fe0.2O3-δ钙钛矿中A位的Sr2+被Ba2+取代及B位的Co4+部分被Nb5+取代,有效地提高了BaCo0.7Fe0.2Nb0.1O3-δ钙钛矿材料的化学稳定性.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 O2-TPD, CO2- 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.

关 键 词：透氧膜反应器 钙钛矿 化学稳定性 

分 类 号：TQ031[化学工程]