中国物理B ›› 2019, Vol. 28 ›› Issue (4): 48102-048102.doi: 10.1088/1674-1056/28/4/048102

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Density functional calculations of efficient H2 separation from impurity gases (H2, N2, H2O, CO, Cl2, and CH4) via bilayer g-C3N4 membrane

Yuan Guo(郭源), Chunmei Tang(唐春梅), Xinbo Wang(王鑫波), Cheng Wang(王成), Ling Fu(付玲)   

  1. 1 College of Science, Hohai University, Nanjing 210098, China;
    2 College of Agricultural Engineering, Nanyang Normal University, Henan Key Laboratory of Ecological Security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province;Collaborative Innovation Center of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province, Nanyang 473061, China
  • 收稿日期:2018-11-17 修回日期:2019-02-11 出版日期:2019-04-05 发布日期:2019-04-05
  • 通讯作者: Chunmei Tang, Ling Fu E-mail:tcmnj@163.com;ful263@nenu.edu.cn
  • 基金资助:

    Project supported by the Fundamental Research Funds for the Central Universities, China (Grant No. 2018B19414), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20161501), the Six Talent Peaks Project in Jiangsu Province, China (Grant No. 2015-XCL-010), the National Natural Science Foundation of China (Grant Nos. 51776094 and 51406075), the Program of Henan Provincial Department of Education, China (Grant No. 16A330004), the Special Fund of Nanyang Normal University, China (Grant No. ZX2016003), the Science and Technology Program of Henan Department of Science and Technology, China (Grant No. 182102310609), and the Scientific Research and Service Platform Fund of Henan Province, China (Grant No. 2016151).

Density functional calculations of efficient H2 separation from impurity gases (H2, N2, H2O, CO, Cl2, and CH4) via bilayer g-C3N4 membrane

Yuan Guo(郭源)1, Chunmei Tang(唐春梅)1, Xinbo Wang(王鑫波)1, Cheng Wang(王成)1, Ling Fu(付玲)2   

  1. 1 College of Science, Hohai University, Nanjing 210098, China;
    2 College of Agricultural Engineering, Nanyang Normal University, Henan Key Laboratory of Ecological Security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province;Collaborative Innovation Center of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province, Nanyang 473061, China
  • Received:2018-11-17 Revised:2019-02-11 Online:2019-04-05 Published:2019-04-05
  • Contact: Chunmei Tang, Ling Fu E-mail:tcmnj@163.com;ful263@nenu.edu.cn
  • Supported by:

    Project supported by the Fundamental Research Funds for the Central Universities, China (Grant No. 2018B19414), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20161501), the Six Talent Peaks Project in Jiangsu Province, China (Grant No. 2015-XCL-010), the National Natural Science Foundation of China (Grant Nos. 51776094 and 51406075), the Program of Henan Provincial Department of Education, China (Grant No. 16A330004), the Special Fund of Nanyang Normal University, China (Grant No. ZX2016003), the Science and Technology Program of Henan Department of Science and Technology, China (Grant No. 182102310609), and the Scientific Research and Service Platform Fund of Henan Province, China (Grant No. 2016151).

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摘要：

Membrane technology has been used for H2 purification. In this paper, the systematic density functional simulations are conducted to study the separation of H2 from the impurity gases (H2, N2, H2O, CO, Cl2, and CH4) by the bilayer porous graphitic carbon nitride(g-C3N4) membrane. Theoretically, the bilayer g-C3N4 membrane with a diameter of about 3.25 Å should be a perfect candidate for H2 purification from these mixed gases, which is verified by the high selectivity (S) for H2 over other kinds of gases (3.43×1028 for H2/N2; 1.40×1028 for H2/H2O; 1.60×1026 for H2/CO; 4.30×1014 for H2/Cl2; 2.50×1055 for H2/CH4), and the permeance (P) of H2 (13 mol/m2·s·Pa) across the bilayer g-C3N4 membrane at 300 K, which should be of great potential in energy and environmental research. Our studies highlight a new approach towards the final goal of high P and high S molecular-sieving membranes used in simple structural engineering.

关键词: g-C3N4, gas separation, density functional, molecular dynamics simulation

Abstract:

Membrane technology has been used for H2 purification. In this paper, the systematic density functional simulations are conducted to study the separation of H2 from the impurity gases (H2, N2, H2O, CO, Cl2, and CH4) by the bilayer porous graphitic carbon nitride(g-C3N4) membrane. Theoretically, the bilayer g-C3N4 membrane with a diameter of about 3.25 Å should be a perfect candidate for H2 purification from these mixed gases, which is verified by the high selectivity (S) for H2 over other kinds of gases (3.43×1028 for H2/N2; 1.40×1028 for H2/H2O; 1.60×1026 for H2/CO; 4.30×1014 for H2/Cl2; 2.50×1055 for H2/CH4), and the permeance (P) of H2 (13 mol/m2·s·Pa) across the bilayer g-C3N4 membrane at 300 K, which should be of great potential in energy and environmental research. Our studies highlight a new approach towards the final goal of high P and high S molecular-sieving membranes used in simple structural engineering.

Key words: g-C3N4, gas separation, density functional, molecular dynamics simulation

中图分类号:  (Porous materials; granular materials)

  • 81.05.Rm
81.05.U- (Carbon/carbon-based materials) 71.15.Mb (Density functional theory, local density approximation, gradient and other corrections)