Experimental and modeling study of gas transport through composite ceramic membranes

Inorganic microporous membranes for H2 and CO2 separation—Review of experimental and modeling progress

“…On such a basis, a simplification of Maxwell-Stefan model was adopted to describe the binary mixture permeation data, which requires only the adsorption and diffusivity data of single component. Some researchers declared that the Maxwell-Stefan model cannot properly explain the interactions between different molecules, as the introduction of binary exchange coefficient ( S ij D ) often results in a deviation from experimental fluxes, which is also observed in our study (Li et al, 2014a;Li et al, 2014b).…”

Comparison of the Simplification of the Pressure Profiles Solving the Binary Friction Model for Asymmetric Membranes

“…The analytical description of the transport through the porous support using the binary friction model (Equation (1)) according to Kerkhoff [3] has been observed to be sufficient [5,6,7,8,9]. $\frac{1}{P_t}\overrightarrow{\nabla }{P}_i=\mathrm{normalR}Ttrue\sum _{j=1}^n\frac{false(x_i{\stackrel{false\to }{N}}_j-x_j{\stackrel{false\to }{N}}_{i}false)}{P_t{D}_{ij}}-r_{im}{\stackrel{false\to }{N}}_i$ where R is the molar gas constant, T the temperature, P t and P i the total and partial pressure of the diffusing species, respectively, r im the friction term, and D ij the effective binary diffusion coefficient.…”

Zeolite membranes – a review and comparison with MOFs

“…However, it has been shown that the rate of flow of sweep gas can play a significant role. 195 The sweep gas increases the driving force for the permeating species and enhances the separation performance. This effect has been shown for methane/ethane separation.…”