制备了金属陶瓷双柏Ni-BaCe_0.6Zr_0.2Nd_0.2O_(3-δ)膜,并将其用丁从含氢混合气巾分离氧气,研究了该膜在不同条件下的透氢性能以及膜片在CO_2与H_2O存在条什卜的透氢稳定性.结果表明,膜片的透氧最随着温度的升高而提高.当使用含3%H_2O的原料气时,膜片透氢量是其在干燥气氛时的2～5倍;在900℃,原料气为潮湿80%H_2/He的条件卜,膜片的透氢量达到0.073cm~3/(min cm~2).膜片在含有30%CO_2的混合气巾,经100 h寿命实验后,仍然保持较高的渗透稳定性.这些结果表明该双相膜在分离CO_2和H2混合气中具有很好的应用前景.
A new Ni-BaCe_0.6Zr_0.2Nd_0.2O_(3-δ)(Ni-BZCN6) cermet membrane was investigated to separate hydrogen from hydrogen-containing mixtures. Hydrogen permeation properties of the membrane and permeation stability under atmospheres containing CO_2 and H_2O were in-vestigated under different conditions. Hydrogen permeation flux increases with increasing temperature. When the feed gas was moistened by 3% H_2O, the flux was about 2-5 times that not moistened. It reached 0.073 cm~3/(min cm~2) at 900℃ when a wet feed gas of 80% H_2/He was used. After 100 h operation under 30% CO_2, the membrane still keeps a steady permeation flux. These results suggest that the Ni-BZCN6 membrane is suitable for hydrogen separation from mixed gas containing H_2 and CO_2.
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