Co‐firing technology for the preparation of asymmetric oxygen transporting membranes based on BSCF and Zr‐doped BSCF
Co‐firing technology for the preparation of asymmetric oxygen transporting membranes based on BSCF and Zr‐doped BSCF
复制标题
BSCF和Zr掺杂BSCF共烧制备不对称氧传输膜技术
DOI：
10.1002/aic.14283
复制
发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
I. Voigt
中科院分区：
文献类型：
--
作者：
U. Pippardt;J. Böer;L. Kiesel;R. Kircheisen;R. Kriegel;I. Voigt
意义
通过共烧由浆料涂覆的绿色载体，在一个步骤中制备具有450 mm长度的不对称管状膜。将BSCF（Ba0.5Sr0.5Co0.8Fe0.2O3-δ）和Zr掺杂的BSCF 3 Zr（Ba0.5Sr0.5（Co0.8Fe0.2）0.97Zr0.03O3-δ）用于分离层以及用于多孔载体，后者与作为成孔剂的PMMA微球一起。在室温下的气体泄漏低于0.003 mL STP/（cm 2·min）。在900°C真空操作模式下观察到的氧通量高达12 mL STP/（cm 2·min）。氧通量随着驱动力的增加而增加，但曲线的斜率在更高的驱动力下变平，这可能是由于限制了多孔载体内部的表面交换和压力损失。不对称BSCF管的氧渗透比BSCF 3 Zr略高，并且在可比的操作条件下超过单片BSCF膜的氧通量4倍。© 2013美国化学工程师学会AIChE J，60：15-21，2014
Significance
Asymmetric tubular membranes with a length of 450 mm were prepared in one step by co-firing of a green support coated by slurry. BSCF (Ba0.5Sr0.5Co0.8Fe0.2O3-δ) and Zr-doped BSCF3Zr (Ba0.5Sr0.5(Co0.8Fe0.2)0.97Zr0.03O3-δ) were used for the separation layer as well as for the porous support, latter one together with PMMA microspheres as a pore forming agent. The gas leakage at room temperature was below 0.003 mL STP/(cm2·min). Oxygen fluxes up to 12 mL STP/(cm2·min) were observed at 900°C in vacuo operation mode. The oxygen flux increased with growing driving force but the slope of the curve flattened at higher driving forces probably caused by limiting surface exchange and pressure losses inside the porous support. The oxygen permeation of asymmetric BSCF tubes was slightly higher compared to BSCF3Zr and exceeded the oxygen flux of a monolithic BSCF membrane by a factor of 4 at comparable operation conditions. © 2013 American Institute of Chemical Engineers AIChE J, 60: 15–21, 2014