Abstract
A membrane separation technology is promising for CO2 separation from a flue gas, syngas, natural gas and biogas due to its energy saving and low cost features. A wide variety of membrane materials and their CO2 permeation mechanisms have been studied for high performance CO2 separation and purification applications. An introduction and survey of domestic projects related to CO2 separation by membranes are given below. The latest developments in polymeric, facilitated transport, ionic liquid gel, ceramic, and carbon membranes in Japan are also reviewed. Potentiality of the above mentioned membranes would give a significant impact on the current CO2 capture technologies, such as liquid amine scrubbing. Since CO2 separation performance of the membranes developed in Japan is world top level, and some of them would meet to a required performance and be waiting for practical applications. These membranes and membrane processes would be implemented not in the distant future.
