The diffusion of pure H2, CO, N2, O2 and CH4 gases through nanoporous carbon membranes was investigated by carrying out non-equilibrium simulations. The flux, transport diffusivity and activation energy for pure gases diffusing through membranes having various pore widths were investigated. The results revealed that the transport diffusivity increased with temperature and pore width, and was 10−7m2/s for pore widths of 0.80 to 1.21nm at 273 to 300K. The activation energies for gas diffusion through membranes with various pore widths were about 1 to 5kJ/mol.

Diffusion of H2, CO, N2, O2 and CH4 through Nanoporous Carbon Membranes. Wu, Z., Liu, Z., Wang, W., Fan, Y., Xu, N.: Chinese Journal of Chemical Engineering, 2008, 16[5], 709-14