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Coupling of dielectric barrier discharge plasma with oxygen permeable membrane for highly efficient low-temperature permeation
Journal of Membrane Science ( IF 9.5 ) Pub Date : 2021-09-23 , DOI: 10.1016/j.memsci.2021.119896
Qiankun Zheng 1 , Yaqiong Xie 1 , Jinkun Tan 1 , Zhi Xu 1 , Ping Luo 1 , Tianlei Wang 1 , Zhengkun Liu 1 , Feng Liu 2 , Kui Zhang 3 , Zhi Fang 2 , Guangru Zhang 1 , Wanqin Jin 1
Affiliation  

Ceramic oxygen permeable membranes (OPMs) are widely considered the “next generation” technology for pure oxygen separation and catalytic membrane reactors. However, the main issue of OPM is high operating temperature (above 800 °C) and resulting implications for materials, cost, as well as operating complexities (e.g., sealing, creep deformation, and thermal shock during thermal cycling). A new design for coupling OPM La0.6Sr0.4Co0.2Fe0.8O3-δ with a dielectric barrier discharge plasma (a type of atmospheric pressure non-thermal plasma) is proposed for highly efficient low-temperature (600 °C) oxygen permeation. This study demonstrates that the plasma can activate the surface exchange reactions. Applying 15 W air-plasma can effectively reduce the apparent activation energy of the permeation process from 136.6 to 43.1 kJ mol−1. The oxygen flux is increased by a factor of nearly 30 at 600 °C with a plasma power of 15 W. The newly developed plasma-membrane micro-reactor design enables further performance enhancement at lower operating temperatures and integration with solid oxide fuel cells, catalytic membrane reactors, and oxygen permeable membranes.



中文翻译:

介质阻挡放电等离子体与透氧膜的耦合实现高效低温渗透

陶瓷透氧膜 (OPM) 被广泛认为是纯氧分离和催化膜反应器的“下一代”技术。然而,OPM 的主要问题是高工作温度(高于 800 °C)以及由此产生的对材料、成本以及操作复杂性(例如,热循环过程中的密封、蠕变变形和热冲击)的影响。耦合 OPM La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ 的新设计提出了具有介质阻挡放电等离子体(一种大气压非热等离子体)的高效低温(600°C)氧气渗透。该研究表明等离子体可以激活表面交换反应。应用15 W 空气等离子体可以有效地将渗透过程的表观活化能从136.6 降低到43.1 kJ mol -1。氧通量在 600 °C 时增加近 30 倍,等离子体功率为 15 W。新开发的等离子膜微反应器设计可在较低的工作温度下进一步提高性能,并与固体氧化物燃料电池、催化膜反应器和透氧膜。

更新日期:2021-10-01
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