Thin Film Composite (TFC) Membrane in Membrane Gas Absorption System

摘要

Flue gas is a gas is released to the atmosphere via a flue and quite often refers to the combustion exhaust gas produced at power plants. Its composition generally depends on what is being burned, but usually consist of mostly carbon dioxide (CO2) and water vapor as well as nitrogen (N2) and excess oxygen. Lately, the removal of CO2 from flue gases has received intense attention due to the properties of CO2. It is widely known that CO2 is a one of the major greenhouses gases. Membrane gas absorption (MGA) is one technology used to remove the CO2. The present research focuses on the separation of CO2 from N2 using a thin film composite (TFC) membrane based on glutaraldehyde in MGA system. The THC membrane with glutaraldehyde as the selective layer on the top of different microfiltration supports with varying properties based on polypropylene (PP) and polyvinylidene fluoride (PVDF) were prepared. The effects of crucial parameters that effected TFC membrane performance such as coating solution concentration, membrane support porosity and nature of materials were investigated. Deionized water was employed as the liquid absorbent. The TFC membrane in combination with deionized water as an absorbent liquid was found to be a suitable for bulk CO2 removal using MGA system.