Gas separation membranes are used to separate gases based on the differences in permeability of the species flowing through the membrane. Membrane-based gas separation relies on the ability of various components of a feed stream to permeate a membrane at different rates. Membranes used for gas separation are of different types, namely, polymeric, metallic, inorganic, and matrix membranes. Polymeric membranes are the only commercialized membranes which are used in various applications. Other types of membranes are still in the development stage and are yet to be commercialized. _____________ 1. Micromarkets are defined as the sub-segments of the gas separation membranes market included in the report. 2. Core competencies of the companies are determined in terms of their key developments and strategies adopted to sustain their position in the market.