دورية
A Calorimetric Study on the Phase Behavior of Tetra-n-butyl Phosphonium Bromide + CO2Semiclathrate Hydrate and Evaluation of CO2Consumption─Impact of a Surfactant
| العنوان: | A Calorimetric Study on the Phase Behavior of Tetra-n-butyl Phosphonium Bromide + CO2Semiclathrate Hydrate and Evaluation of CO2Consumption─Impact of a Surfactant |
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| المؤلفون: | Xie, Feng-Mei, Li, Xi-Yue, Zhong, Dong-Liang, Englezos, Peter, Lu, Guo-Xiang |
| المصدر: | Journal of Chemical and Engineering Data; November 2021, Vol. 66 Issue: 11 p4228-4235, 8p |
| مستخلص: | This work presents data on the phase behavior of tetra-n-butyl phosphonium bromide (TBPB) semiclathrate hydrate formed in the presence of CO2at a stoichiometric concentration (2.57 mol % TBPB). A high pressure microdifferential scanning calorimeter (HP μ-DSC) was employed to measure the phase equilibrium data and identify the dissociation behaviors of TBPB + CO2semiclathrate hydrate. It was found that the phase equilibrium conditions for TBPB + CO2semiclathrate hydrate formed at 2.57 mol % TBPB were lower than CO2hydrate formed in pure water and TBPB + CO2semiclathrate hydrate formed at 0.5 mol % TBPB. The coexistence of CO2hydrate (sI) and TBPB + CO2semiclathrate were identified in the 2.57 mol % TBPB solution. When adding 500 ppm sodium dodecyl sulfate (SDS) into the 2.57 mol % TBPB solution, CO2hydrate disappeared and more TBPB + CO2semiclathrate hydrate was formed. However, under the same temperature and pressure conditions, CO2consumption during the formation of TBPB + CO2semiclathrate hydrate was reduced when 500 ppm of SDS was added to the 2.57 mol % TBPB solution. Therefore, future work should aim to increase the CO2storage capacity of TBPB semiclathrate hydrate. |
| قاعدة البيانات: | Supplemental Index |
Find this issue from the American Chemical Society | تدمد: | 00219568 15205134 |
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| DOI: | 10.1021/acs.jced.1c00399 |