Dynamic measurements of hydrate based gas separation in cooled silica gel |
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| Affiliation: | 1. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, China;2. Jiangsu Key Laboratory of Oil and Gas Storage and Transportation Technology, Changzhou University, Changzhou, 213016, China;3. University of Chinese Academy of Sciences, Beijing, 100049, China;4. Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, China;1. Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, PR China;2. Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China;3. Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, PR China;1. Laboratory of Materials Chemistry and the Living (LCMVAR), University Hadj Lakhdar Batna-1, 05 a.v. Chahid Boukhlouf, 05000 Batna, Algeria;2. Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036, India;3. Gas Hydrates Dynamic Centre, ENSM Saint-Etienne, 158 Cours Fauriel, 42023 Saint-Etienne, France;4. Sonatrach-Upstream Activity, Technologies and Development Division, Avenue 01 November, 35000 Boumerdes, Algeria;5. Gas Hydrate and Flow Assurance Laboratory, Petroleum Engineering Program, Department of Ocean Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036, India;1. University of Chinese Academy of Sciences, Beijing 100049, China;2. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China;3. CAS Key Laboratory of Gas Hydrate, Guangzhou 510640, China;4. Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China;5. Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, China;1. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China;2. CAS Key Laboratory of Gas Hydrate, Guangzhou 510640, China;3. Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China;4. Guangzhou Center of Gas Hydrate Research, Chinese Academy of Science, Guangzhou 510640, China;5. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Hydrate based gas separation is a promising method for carbon dioxide capture. The purpose of this study is to analyze hydrates formation and dissociation characters when gas mixture flows through cooled silica gel. The additives mixture (THF/SDS) was used to saturate the silica gel partly, and gas mixture (CO2/H2) was injected into it to form hydrates. Magnetic resonance imaging (MRI) images were obtained using fast spin echo multi-slice pulse sequence. Hydrates saturations were calculated quantitatively using MRI data. The experimental results showed that the optimal initial solution saturation was 34.2% in this investigation. The gas component was analyzed to assess the separation efficiency. For hydrates dissociation processes at 1 atmospheric pressure, CO2 concentrations increased obviously. Half of the six cycles showed that more than 85.00 mol% CO2 contained in the capture gas, and the lowest CO2 concentration was 64.83 mol%. Hydrate blockages appeared frequently, which restricted the contact of gas and solution and caused the incomplete transformations of residual solution to hydrates. It was a key restricted factor for hydrate based CO2 capture. |
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| Keywords: | Gas separation Hydrate Dynamic |
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