Title |
Nitrogen Production by Efficiently Removing Oxygen From Air Using a Perovskite Hollow-Fiber Membrane With Porous Catalytic Layer
|
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Published in |
Frontiers in Chemistry, August 2018
|
DOI | 10.3389/fchem.2018.00329 |
Pubmed ID | |
Authors |
Tianmiao Hu, Hangyue Zhou, Hui Peng, Heqing Jiang |
Abstract |
Nowadays, nitrogen is mainly produced from air by cryogenic separation, pressure-swing adsorption (PSA) and polymeric membrane technology. In this paper, we report a perovskite membrane-based nitrogen production route, which is basically driven by methane combustion. By coupling air separation with methane combustion on the opposite sides of oxygen-permeable perovskite membrane, most of oxygen in air is efficiently removed through the perovskite membrane and then consumed by methane oxidation. A nitrogen production rate of ca. 23 cm3 min-1 with purity of 98-99% was successfully achieved, and remained stable over 120 h, with a methane conversion of 71-73% on the other side of perovskite membrane. This work demonstrates that the joint use of oxygen-permeable perovskite membrane and methane oxidation is a promising strategy for nitrogen production and inspires more research efforts in the field of gas separation. |
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