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OS1C-3：A SUMMARYOF EXPERIMENTAL INVESTIGATION ON CO2 HYDRATE FORMATION AND DISSOCIATION
发布时间:2014-07-28
Yongchen SONG, Pengfei WANG, Mingjun YANG, Wen JING
Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technolog, CHINA
Since the extensive use of fossil fuels, the greenhouse gas concentration is increasingly serious. Carbon dioxide capture and storage technology is an effective way to mitigate the global warming. As a new method, hydrate-based carbon dioxide capture is attracting widespread attention. Based on the extensive reading about researches on it, we carried out a serious investigation on CO2 hydrate. In order to give a simple and clear introduction on our research group's previous work in this area, a systematic summary about our previous experiments and conclusions are shown in this paper. The data base of porous media, THF concentration and their influence on CO2 hydrate phase equilibrium were constructed and analyzed. The factors’ influence on CO2 separation effect was contrasted. We found the type of porous medium and THF concentration have greater influence on the separation effect. And the MRI images show carbon dioxide hydrate decomposition process is significantly affected by temperature. In order to meet the continuity requirements of hydrate-based carbon dioxide capture process in industrial applications, the hydrate formation and decomposition character in a flow system data was measured by MRI. And additives’ influence on hydrate formation and gas separation characteristics in various CO2 systems in static and dynamic conditions was compared. In static conditions, hydrate formation and dissociation is mainly affected by the size of the porous medium and concentration of THF. In dynamic conditions, they are mainly affected by the size of the porous medium and pressure. The pressure’ influence on CO2 hydrate separation effect under static and dynamic conditions is different. That provides important data to support the CO2 hydrate application of technology in the flow state.
Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technolog, CHINA
Since the extensive use of fossil fuels, the greenhouse gas concentration is increasingly serious. Carbon dioxide capture and storage technology is an effective way to mitigate the global warming. As a new method, hydrate-based carbon dioxide capture is attracting widespread attention. Based on the extensive reading about researches on it, we carried out a serious investigation on CO2 hydrate. In order to give a simple and clear introduction on our research group's previous work in this area, a systematic summary about our previous experiments and conclusions are shown in this paper. The data base of porous media, THF concentration and their influence on CO2 hydrate phase equilibrium were constructed and analyzed. The factors’ influence on CO2 separation effect was contrasted. We found the type of porous medium and THF concentration have greater influence on the separation effect. And the MRI images show carbon dioxide hydrate decomposition process is significantly affected by temperature. In order to meet the continuity requirements of hydrate-based carbon dioxide capture process in industrial applications, the hydrate formation and decomposition character in a flow system data was measured by MRI. And additives’ influence on hydrate formation and gas separation characteristics in various CO2 systems in static and dynamic conditions was compared. In static conditions, hydrate formation and dissociation is mainly affected by the size of the porous medium and concentration of THF. In dynamic conditions, they are mainly affected by the size of the porous medium and pressure. The pressure’ influence on CO2 hydrate separation effect under static and dynamic conditions is different. That provides important data to support the CO2 hydrate application of technology in the flow state.
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