INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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High efficiency hydrogen purification through P2C3 membrane: A theoretical study |
Zhao-Qin Chu(储兆琴)1,2, Xiao Gu(顾晓)1,2, Xiang-Mei Duan(段香梅)1,2 |
1 Department of Physics, Ningbo University, Ningbo 315211, China; 2 Laboratory of Clean Energy Storage and Conversion, Ningbo University, Ningbo 315211, Chinaa |
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Abstract It is critical to design an effective two-dimensional membrane for hydrogen purification from the mixed gas, due to its wide range of scientific and industrial applications. In this work, we investigate the hydrogen separation performance of P2C3 membranes by density functional theory and molecular dynamics simulations. The results show that the energy barrier of the H2 molecule through the P2C3 film is only 0.18 eV, while the energy barriers of the CO, N2, CO2, and CH4 molecules are 0.77 eV, 0.87 eV, 0.52 eV, and 1.75 eV, respectively. In addition, the P2C3 film has high H2 selectivity toward other gas molecules and high H2 permeability at room temperature. Under 6% tensile strain, 82% hydrogen molecules pass through the film with a H2 permeance of 2.22×107 gas permeance unit (GPU), while other molecules cannot across the membrane at all. Therefore, the P2C3 membrane is an excellent material for hydrogen purification.
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Received: 16 October 2019
Accepted manuscript online:
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PACS:
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87.16.D-
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(Membranes, bilayers, and vesicles)
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71.15.Mb
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(Density functional theory, local density approximation, gradient and other corrections)
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81.05.Rm
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(Porous materials; granular materials)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11574167 and 11874033) and the KC Wong Magna Foundation in Ningbo University, China. |
Corresponding Authors:
Xiang-Mei Duan
E-mail: duanxiangmei@nbu.edu.cn
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Cite this article:
Zhao-Qin Chu(储兆琴), Xiao Gu(顾晓), Xiang-Mei Duan(段香梅) High efficiency hydrogen purification through P2C3 membrane: A theoretical study 2019 Chin. Phys. B 28 128703
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