Executive Summary : | Globalization, population growth, urbanization, industrialization, and resource utilization have led to environmental concerns such as lack of pure drinking water resources, poor health, degradation of forests and fisheries, excessive use of chemical and organic chemicals, loss of ecosystems, soil erosion, and improper agricultural practices. Conventional gas absorption devices like packed towers, spray towers, venture scrubbers, and bubble columns play a vital role in mass transferring gases. However, these methods have limitations such as low gas loading capacity, large equipment size, high energy consumption, and initial investment costs. Membrane-based gas separation technology is crucial for CO2 separation due to its high energy efficiency, low power consumption, easy operation control, maintenance, and low capital cost. Inorganic membranes also play a significant role in gas separation but have limitations such as high material cost, low selectivity, and wetting due to hydrophilicity. The present project aims to address these issues by using ordered mesoporous silica membranes. The membrane's hydrophilicity leads to wetting, increased mass transfer resistance, and decreased membrane flux, affecting its performance. To avoid wetting, the surface of the ordered mesoporous silica membrane can be made hydrophobic by introducing various compounds. The modified ordered mesoporous silica membranes are modified chemically by amino silane derivatives to provide amine-functionalized polycarbosilane compounds, which act as a hydrophobic solid sorbent for CO2 capture. This amine-functionalized membrane can reversibly capture CO2 from flue gas streams with an effective CO2 adsorption rate continuously. The membrane's considerable CO2 adsorption capacity at (40-50) degrees centigrade and lesser sensitivity to moisture make it attractive for CO2 separation from CO2 mixture gas. |