| Reducing atmospheric CO2, a main source of greenhouse gas, has been accentuated recently. One focus is capture, separation, and sequestration of industrial CO2. As a hydrate former, CO2 forms hydrates at moderate temperatures and pressures. This phenomenon could be utilized to capture and separate CO2 from flue gases, and also has the potential to sequester CO2 in the deep seabeds. This research investigated the CO2-N2 separation efficiency of gas hydrates; it investigated the sequestration potential of CO2 hydrates in ocean sediments. The catalytic effect of surfactants in these processes was investigated.; This research work showed that a potentially cost effective hydrate separation technology applied to N2-CO2 gas, representative of a flue gas, can be improved by adding surfactants. It was found that biosurfactants give some beneficial effect on CO2 hydrate formation in sediments and might be used to assist CO2 sequestration in sediments or to displace natural gas from hydrates already in sediments. (Abstract shortened by UMI.)... |
