Perspectives for chitosan‐based membranes in CO₂/N₂ separation : Structure‐property relationship

Abstract

Extensive research has been conducted on a variety of processes for abating the increasing CO 2 emissions which have been causing adverse effects on the environment. Among these, gas separation membranes have the potential to overcome a number of limitations of existing technologies by reducing the cost of operations and providing an efficient, compact module which can be employed for separating CO 2 from natural gas and post-combustion flue gas streams. Recently, chitosan and its derivatives have proven their ability to form CO 2 -selective facilitated transport membranes through the utilization of the amino group fixed site carriers present in the polymer. Later, the performance of chitosan membrane can be substantially improved by carrier enrichment. This review aims to cover the structure-property relations of chitosan and its film-forming derivatives, with a brief discussion of the advantages and challenges in using these polymers.

Environmental Impact Improvement of Chitosan‐Based Mixed‐Matrix Membranes Manufacture for CO2 Gas Separation by Life Cycle Assessment

“…Chitosan (CS) is a linear polysaccharide obtained by the deacetylation of chitin, an abundant natural polymer, which is cheap and obtained from renewable sources, i.e., the shell of crustaceans. CS has been proven to be a suitable organic framework to manufacture membranes for CO 2 /N 2 membranes separation [10]. The only drawback occurs when the uncontrolled high hydrophilicity compromises the mechanical resistance.…”

Thin‐film hydrogel polymer layered polyvinyltrimethylsilane dual‐layer flat‐bed composite membrane for CO2 gas separation

“…Several authors have reported that chitosan (CS) is one of the best CO 2 -philic chelants containing hydrogel biopolymer matrix. [33][34][35][36] Moreover, they possess good film forming capability and more comfortable with auxiliary CO 2 -philic chelants compounds (amines, ethylene oxides (EO), aminoalcohols, etc.). [36][37][38][39][40] Hence in our study, the dual-layer flat-bed hydrogel CS biopolymer coated PVTMS composite membranes were prepared and gas transport behavior of the membranes was studied in detail.…”