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通过干压成型制备了Ba_(0.9)Co_(0.7)Fe_(0.2)Nb_(0.1)O_(3–δ)–Gd_(0.1)Ce_(0.9)O_(2–δ)(BCFN–GDC)双相复合透氧膜。研究了GDC掺入量对氧渗透性能的影响。结果表明:70%BCFN–30%GDC透氧膜的氧渗透速率最高。对70%BCFN–30%GDC透氧膜进行100 h稳定性测试,其透氧量稳定在0.33 mL/(cm~2·min),稳定性良好。进一步将70%BCFN–30%GDC透氧膜用于甲烷部分氧化重整(POM)研究,在900℃、(18 mL/min He+2 mL/min CH_4)的混合气吹扫下,100 h的稳定性测试过程中,CH_4转化率、CO选择性以及透氧量最终分别达到60%、84%和1.7 mL/(cm~2·min),并有缓慢增长的趋势。研究表明:70%BCFN–30%GDC透氧膜具有良好的透氧性能,在POM膜反应器方面具有重要的应用价值。
The Ba_ (0.9) Co_ (0.7) Fe_ (0.2) Nb_ (0.1) O_ (3-δ) -Gd_ (0.1) Ce_ (0.9) O_ (2-δ) Composite oxygen membrane. The effect of GDC content on oxygen permeability was studied. The results showed that the oxygen permeation rate of 70% BCFN-30% GDC membrane was the highest. The stability of 70% BCFN-30% GDC oxygen permeable membrane was tested for 100 h. The oxygen permeability was stable at 0.33 mL / (cm ~ 2 · min) and the stability was good. Further, 70% BCFN-30% GDC oxygen permeable membrane was used for the partial oxidation reforming of methane (POM). After purging with a mixture of 900 mL (18 mL / min He + 2 mL / min CH4) During the stability test, the CH 4 conversion, CO selectivity and oxygen permeability finally reached 60%, 84% and 1.7 mL / (cm ~ 2 · min), respectively, and showed a tendency of slow increase. The results show that: 70% BCFN-30% GDC oxygen permeable membrane has good oxygen permeability and has important application value in POM membrane reactor.