Development of Thermally Stable Mixed Matrix Membranes for Acid Gas Separation in Natural Gas Processing

Abstract

Efficient acid gas separation is a critical requirement in natural gas processing to remove contaminants such as carbon dioxide and hydrogen sulfide that adversely affect fuel quality, pipeline integrity, and environmental compliance. This study investigates the development of thermally stable mixed matrix membranes for enhanced acid gas separation in natural gas processing applications. The proposed membrane system combines polymeric matrices with inorganic filler materials to improve gas selectivity, permeability, thermal resistance, and long-term operational stability under harsh processing conditions. A comprehensive experimental investigation was conducted to evaluate the influence of filler composition, membrane morphology, fabrication conditions, operating temperature, feed pressure, and gas composition on separation performance and membrane durability. Advanced characterization techniques confirmed uniform dispersion of inorganic particles within the polymer matrix, resulting in improved structural integrity and controlled transport pathways for selective gas separation. Performance evaluation demonstrated significant enhancements in carbon dioxide and hydrogen sulfide separation efficiency compared to conventional polymeric membranes. The mixed matrix membranes also exhibited superior thermal stability, mechanical strength, and resistance to plasticization during continuous high-temperature gas separation operations. Comparative analysis revealed that optimized membrane configurations provide improved acid gas selectivity and reduced energy consumption through efficient gas transport mechanisms and enhanced molecular sieving behavior. Furthermore, the developed membranes contributed to stable operational performance and reduced maintenance requirements in industrial gas purification systems. The findings highlight the potential of mixed matrix membrane technologies in advancing energy-efficient and sustainable natural gas processing applications.