TY - JOUR

T1 - Various influence of surface modification on permeability and phase stability through an oxygen permeable membrane

AU - Xue, Jian

AU - Weng, Guowei

AU - Chen, Li

AU - Suo, Yanpeng

AU - Wei, Yanying

AU - Feldhoff, Armin

AU - Wang, Haihui

N1 - Funding Information: The Authors thank the financial support from National Natural Science Foundation of China (Nos. 21706076, 21536005 and 51621001), Natural Science Foundation of Guangdong (2017A030310431 and 2014A030312007), Guangzhou Technology Project (No. 201804010210), China Postdoctoral Science Foundation (No. 2018T110870) and the Deutsche Forschungsgemeinschaft (DFG, FE928/7-1).

PY - 2019/3/1

Y1 - 2019/3/1

N2 - Good oxygen permeability and stability of oxygen transport membrane are highly necessary for practical applications. Herein, through different theories, the oxygen transport limitation step through the Ruddlesden-Popper (Pr0.9La0.1)1.9Ni0.74Cu0.21Ga0.05O4+δ ((PL)1.9NCG) membrane was demonstrated firstly, which suggest surface modification can be an effective approach to improve the oxygen separation performance. After coating, various influences of different side surface modification on permeability and phase stability were observed. The sweep-side coated membrane exhibits largely enhanced permeation fluxes than feed-side coated membrane, and the feed-side coated membrane shows better phase stability under the same conditions (these results reveal that the sweep side is the permeability limitation side and the feed is the phase stability limitation side). The both side coated membrane combines abovementioned advantages which shows 57% enhanced and stable oxygen permeation flux at 800 °C. The observed various modification effects on the permeation performance are discussed based on the surface exchange properties and the mechanism of the oxygen transporting membrane in detail.

AB - Good oxygen permeability and stability of oxygen transport membrane are highly necessary for practical applications. Herein, through different theories, the oxygen transport limitation step through the Ruddlesden-Popper (Pr0.9La0.1)1.9Ni0.74Cu0.21Ga0.05O4+δ ((PL)1.9NCG) membrane was demonstrated firstly, which suggest surface modification can be an effective approach to improve the oxygen separation performance. After coating, various influences of different side surface modification on permeability and phase stability were observed. The sweep-side coated membrane exhibits largely enhanced permeation fluxes than feed-side coated membrane, and the feed-side coated membrane shows better phase stability under the same conditions (these results reveal that the sweep side is the permeability limitation side and the feed is the phase stability limitation side). The both side coated membrane combines abovementioned advantages which shows 57% enhanced and stable oxygen permeation flux at 800 °C. The observed various modification effects on the permeation performance are discussed based on the surface exchange properties and the mechanism of the oxygen transporting membrane in detail.

KW - Gas separation

KW - Mixed conductor

KW - Oxygen permeation membrane

KW - Phase stability

KW - Ruddlesden-Popper oxide

UR - http://www.scopus.com/inward/record.url?scp=85058681706&partnerID=8YFLogxK

U2 - 10.1016/j.memsci.2018.12.040

DO - 10.1016/j.memsci.2018.12.040

M3 - Article

AN - SCOPUS:85058681706

VL - 573

SP - 588

EP - 594

JO - Journal of membrane science

JF - Journal of membrane science

SN - 0376-7388

ER -