Abstract
This work evaluates the viability of a two-stage process using combined nitrogen (N2)-selective and carbon dioxide (CO2)-selective membranes for post-combustion CO2 capture. A novel type of cellulose acetate (CA) hybrid membrane is used here as a N2-selective membrane. The silica functionalized with p-tetranitrocalix[4]arene (Si–CL) was incorporated into the CA matrix, thereby resulting in a CA/Si–CL hybrid membrane. Moreover, the published permeation data of a CO2-selective fixed-site-carrier (FSC) membrane, i.e., polyvinylamine (PVAm) casted on porous polysulfone (PSf), is used here in a simulation study to serve as a second stage membrane. Although experimental work on the CA/Si–CL hybrid membrane is in progress based on the assumptions of initial appreciable results, a two-stage membrane process is proposed in which a N2-selective membrane is placed in the first stage, while a CO2-selective membrane is placed in the second stage. Subsequently, the techno-economic analysis of a two-stage membrane proce...
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