Carbon Dioxide Microbubble Injection - Enhanced Dissolution in Geological Sequestration

CO2 microbubble injection is a novel technology for geological sequestration. Currently most of CO2 geological sequestration projects are focused on large-scale emission sources, while there is a practical need to inject CO2 from small-to middle-scale emission sources. CO2 microbubble injection is available for storing CO2 in aquifers with non-anticline (monotonic) structure in a low-cost concept. In this study CO2 microbubbles were generated by injecting CO2 through micro porous filters and the behaviors of CO2 microbubbles were recorded by a high speed video camera system. Our results suggest that more microbubbles generated by filters with smaller pore and CO2 dissolution enhanced by CO2 microbubbles. CO2 microbubble injection provides an option of considering monoclinic structures exist widely in Japan, as useful sites. We are working on quantifying the CO2 microbubbles size and the volume of dissolved CO2 in saline aquifers. (C) 2010 Published by Elsevier Ltd.