Removal of hydrogen sulfide from natural gas by the graphene-nanotube hybrid structure: A molecular simulation

• DOI: 10.1016/j.cplett.2014.10.054
• Publication Date: 2014-10-31T16:15:38Z
• Authors: Guangping Lei; Chao Liu; Hui Xie; Juanfang Liu
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract The molecular simulations are adopted to investigate the separation of H 2 S/CH 4 mixture by the graphene-nanotube hybrid structure (GNHS). The effects of pressure, temperature and H 2 S mole fraction on the adsorption and separation behaviors are examined. The results show that the separation performance of the GNHS can be enhanced by reducing the adjacent carbon nanotubes (CNTs) distance. The self-diffusivity of H 2 S molecules in the GNHS is 1.83 × 10 −8 m 2 s −1 which is less than that of CH 4 . Therefore, enlarging the diffusivity discrepancy of the two components can improve the separation performance of the GNHS.