A kinetic study of CO2 sorption improvement in the CA-CNTs mixed matrix membrane

International Conference on Process Engineering and Advanced Materials 2018

Wong, E.T.S.^1 ; Jawad, Z.A.^1 ; Chin, B.L.F.^1 ; Wee, S.K.^2

Department of Chemical Engineering, Faculty of Engineering and Science, Curtin University Malaysia, CDT 250, Sarawak, Miri

98009, Malaysia^1

Department of Petroleum Engineering, Faculty of Engineering and Science, Curtin University Malaysia, CDT 250, Sarawak, Miri

98009, Malaysia^2

关键词: Gas separation performance;    Greenhouse emissions;    Homogeneous dispersions;    Kinetic sorption;    Membrane separation;    Mixed matrix membranes;    Nano particulates;    Optimization studies;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/458/1/012066/pdf
DOI  :  10.1088/1757-899X/458/1/012066

来源: IOP

【 摘 要 】

Greenhouse emission notably carbon dioxide (CO2) in the atmosphere have been increasing significantly over the last century. Hence, there is a need to address this issue to minimize the adverse environmental effects. Membrane separation is one solution that could potentially help in this endeavour. Among the many types of membranes available, mixed matrix membrane (MMM) is the most promising with the potential to surpass the many deficiencies present in both inorganic and polymeric membranes. In this study, results confirmed that incorporation of functionalized CNTs increases CO2 permeance. Hence, the different loadings of MWCNTs-F were investigated to find the optimum gas separation performance. From this optimization study, excellent MMM performances in terms of CO2 permeance were shown in 0.1wt% loading of MWCNTs-F. This superior performance was attributed to a good homogeneous dispersion of MWCNTs-F in the CA matrix which consequently enlarged the free volumes between the polymer chains and improved the polymer nano particulate interface. Apart from this, a kinetic sorption study showed improvements in the CO2 solubility coefficient over previous related work at 14.9601 × 1013 cm3(STP)/cm4.cmHg. Hence, the usage of lower acetyl content is proven to be capable of increasing the CO2 solubility coefficient.