CH 4 1 CO2/CH4 mixed gas separation 1 Carbon dioxide 1 Composite hollow fibre membranes 1 Composite membranes 1 Dip coating 1 Economic and social effects 1 Field emission microscopes 1 Fourier transform infrared spectroscopy 1 Gas permeable membranes 1 Gases 1 Metal organic framework 1 Metalorganic frameworks (MOFs) 1 Mixed gas 1 Mixed gas separations Multilayer composite 1 Multilayer composite hollow fiber membrane 1 Multilayers 1 Organometallics 1 Scanning electron microscopy 1 Separation 1 dip-coating 1 metal organic frameworks (MOFs) 1 multilayer composite hollow fiber membrane 1