Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Enhanced performance on CO2 adsorption and release induced by structural transition that occurred in TBAB center dot 26H(2)O hydrates | |
Zhou, Xuebing1,2,3,4; Liang, Deqing1,2,3,4
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| 2019-12-15 | |
| Source Publication | CHEMICAL ENGINEERING JOURNAL
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| ISSN | 1385-8947 |
| Volume | 378Pages:9 |
| Corresponding Author | Liang, Deqing(liangdq@ms.giec.ac.cn) |
| Abstract | The applications of ionic clathrate hydrates have greatly improved the efficiency and the conditions required for hydrate-based CO2 capture, but high energy input for hydrate growth and complicated treatment of hydrate slurry still hinder their commercial use. Here we chose TBAB center dot 26H(2)O hydrate particles to adsorb CO2 molecules instead of TBAB solutions below 2 MPa and release them at ambient pressure. Results showed that the TBAB center dot 26H(2)O hydrate could adsorb CO2 without induction time and enhance the gas storage capacity by structural transition, especially under high pressure. By using in situ Raman, CO2 molecules were found to fill the empty cages in TBAB center dot 26H(2)O hydrate first, the formed nCOZTBAB center dot 26H(2)O hydrate then converted to nCOZTBAB center dot 38H(2)O and TBAB center dot 2(1)/3H2O hydrates at 2 MPa. Macroscopic measurements revealed that around 20 volume of CO2 in standard state could be adsorbed by 1 volume of TBAB center dot 26H(2)O hydrate sample at 1 MPa, but this volume ratio could reach 67 v/v at 2 MPa where structural change was thought to take place. The pressurized CO2 trapped in hydrate phase was assumed to destroy the structure of TBAB center dot 26H(2)O hydrate easily, and force the water molecules to form a structure that more compatible with CO2 molecules. This may explain why nCOZTBAB center dot 26H(2)O hydrates barely grow from TBAB solutions when pressurized CO2 is injected. In the CO2 release process, the nCOZTBAB center dot 38H(2)O and TBAB center dot 2(1)/3H2O hydrates quickly transformed back to nCO(2)center dot TBAB center dot 26H(2)O hydrates and 60-80% of the captured CO2 could be released. Combing with their excellent gas selectivity, TBAB center dot 26H(2)O hydrate particles would be an ideal material for hydrate-based CO2 capture. |
| Keyword | Gas hydrate Hydrate-based technology Carbon dioxide |
| DOI | 10.1016/j.cej.2019.122128 |
| WOS Keyword | CARBON-DIOXIDE SEPARATION ; BUTYL AMMONIUM BROMIDE ; TETRABUTYLAMMONIUM BROMIDE ; FLUE-GAS ; CAPTURE ; MIXTURES ; MONTMORILLONITE ; NANOPARTICLES ; KINETICS ; PHASE |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51706230] ; National Natural Science Foundation of China[51576197] ; National Natural Science Foundation of China[51661165011] ; Guangdong MEPP Fund[GDOE[2019]A39] ; National key research and development plan of China[2017YFC0307306] |
| WOS Research Area | Engineering |
| Funding Organization | National Natural Science Foundation of China ; Guangdong MEPP Fund ; National key research and development plan of China |
| WOS Subject | Engineering, Environmental ; Engineering, Chemical |
| WOS ID | WOS:000487764800061 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/25950 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Liang, Deqing |
| Affiliation | 1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China 2.Chinese Acad Sci, Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China 3.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Guangdong, Peoples R China 4.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China |
| First Author Affilication | GuangZhou Institute of Energy Conversion,Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Zhou, Xuebing,Liang, Deqing. Enhanced performance on CO2 adsorption and release induced by structural transition that occurred in TBAB center dot 26H(2)O hydrates[J]. CHEMICAL ENGINEERING JOURNAL,2019,378:9. |
| APA | Zhou, Xuebing,&Liang, Deqing.(2019).Enhanced performance on CO2 adsorption and release induced by structural transition that occurred in TBAB center dot 26H(2)O hydrates.CHEMICAL ENGINEERING JOURNAL,378,9. |
| MLA | Zhou, Xuebing,et al."Enhanced performance on CO2 adsorption and release induced by structural transition that occurred in TBAB center dot 26H(2)O hydrates".CHEMICAL ENGINEERING JOURNAL 378(2019):9. |
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