Preparation of Mixed Matrix Membranes Containing COF Materials for CO₂Removal from Natural Gas/Review

Abstract

Gas separation membranes are one of the most important processes in purifying natural gas. CO2 reduction of natural gas is essential for purifying the gas and increasing its calorific value. A covalent organic framework (COF) has been developed as a filler in mixed-matrix membranes (MMM) to separate gases. COF materials were chosen because of their economical rate, good thermal and chemical stability, and flexible microporous structure. Mixed matrix membranes (MMMs) have received significant interest for their improved permeability and selectivity in natural gas purification. The results of using COF combined with other chemicals added to MMM. It has been observed that CO2 permeability increases as the COF content in the MMM increases, which enhances the gas-separation performance of the MMM. This review evaluated and analyzed the current scientific and the technical breakthroughs in developing MMMs, especially the unique type of organic fillers, which has been the basis of numerous new research for CO2 separation.

Statistical analysis of CO2/N2 gas separation permeance and selectivity using taguchi method

“…Polysulfone (PSF) based on the phenyl group [ 10 ], along with polyethersulfone (PES) and aromatic polyimide, are widely used as polymeric materials for gas separation. PSF membranes, in particular, have been selected for their commercial availability, ease of treatment, and superior separation performance [ 11 ][ [12] , [13] ].…”

“…Phase inversion is the basis for generating asymmetric polymeric membranes [ [14] , [15] ]. This process included immersion (water bath) precipitation, evaporation under control (a volatile co-solvent was evaporated from the polymer solution), precipitation caused by a change in temperature, also known as thermal precipitation, or vapor-phase precipitation (using a non-solvent vapor phase to immerse the cast film ([ 14 , 16 ].…”

A study of the effects of mixtures of solvents on CO2/N2 gas separation in polysulfone flat sheet membranes

“…Polyethersulfone (PES), polysulfone (PSF), and polyimide are among the most widely utilized gas separation polymeric materials [11]. PSF membranes were chosen for their commercial availability, treatment simplicity, and higher separation [12]. It is soluble in a variety of nonvolatile solvents, including N-methyl pyrrolidinone (NMP) and N-dimethylacetamide (DMAc), but less so in volatile solvents such as tetrahydrofuran (THF) and dichloromethane (DCM).…”