Nitrogen Production by Efficiently Removing Oxygen From Air Using a Perovskite Hollow-Fiber Membrane With Porous Catalytic Layer.
FRONTIERS IN CHEMISTRY(2018)
摘要
Nowadays, nitrogen is mainly produced from air by cryogenic separation, pressureswing 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 cm(3) 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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关键词
nitrogen production,perovskite,oxygen transport membrane,hollow-fiber,catalytic layer
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