MOF based mixed matrix membrane with enhanced selectivity and permeability for CO2/CH4 gas separation
Paper ID : 1113-MST2015-FULL
Mahmood Hemmati1, Toraj Mohammadi2
1Chemical Polymeric and Petrochemical Technology Development Research Division, Research Institute of Petroleum Industry (RIPI), Tehran, Iran
2Faculty of Chemical Engineering, Iran University of Science and Technology (IUST)
In this study the Fe(BTC) particles were incorporated into polyurethane matrix to form dense mixed matrix membranes (MMMs) by a solution-casting method. Fe(BTC) particles were characterized by scanning electron microscopy (SEM). In order to investigate the effect of Fe(BTC) loading on the membrane performance in CO2/CH4 separation, different membranes were prepared with varying amounts of Fe(BTC) (0-15 wt.%). Gas transport properties of the membranes were investigated by single gas permeation experiments of CO2 and CH4 at 4 bar feed pressure. In addition to gas permeation experiments, morphological and mechanical properties of the membranes were characterized by SEM and tensile analysis. The addition of the MOF increased the selectivity of the membranes for CO2/CH4 systems by increasing the CO2 solubility, and the diffusion of gases through the porous metal organic frameworks led to the simultaneous increase in CO2 permeability. The membrane with 15 wt.% Fe(BTC) content presented the highest performance with 86.5% and 95.1% enhancement in ideal selectivity and CO2 permeability respectively.
Membrane gas separation, Mixed matrix membrane, Polyurethane, Fe(BTC).
Status : Paper Accepted (Poster Presentation)