Phase equilibrium and kinetics of gas hydrates formed from CO2/H2 in the presence of tetrahydrofuran and cyclohexane
| Autor: | Wen-Chun Wang, Yiyu Lu, Dong-Liang Zhong, Jia-Le Wang, Yu-Rui Wang |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Cyclohexane
020209 energy Clathrate hydrate Enthalpy Energy Engineering and Power Technology 02 engineering and technology Geotechnical Engineering and Engineering Geology chemistry.chemical_compound Fuel Technology chemistry 0202 electrical engineering electronic engineering information engineering Organic chemistry Physical chemistry Gas separation Hydrate Selectivity Cyclopentane Tetrahydrofuran |
| Zdroj: | Journal of Natural Gas Science and Engineering. 35:1566-1572 |
| ISSN: | 1875-5100 |
| Popis: | In the present study, tetrahydrofuran (THF) and cyclohexane (CH) were combined as a mixed promoter to improve the hydrate based gas separation (HBGS) process for the separation of CO 2 from a CO 2 /H 2 gas mixture (40 mol% CO 2 and 60 mol% H 2 ). The amount of THF and CH used was fixed at 1.0 mol% and 10 vol% respectively. The phase equilibrium data of gas hydrates formed in the presence of the mixed THF + CH promoter were measured between 275.15 K and 281.15 K, and were compared with that obtained in the presence of other thermodynamic promoters (THF, cyclopentane, etc.). The hydrate dissociation enthalpy was calculated from the phase equilibrium data measured in the presence of the mixed THF + CH promoter and was reported. In addition, kinetic experiments were conducted to assess the impact of the mixed promoter (1.0 mol% THF + 10 vol% CH) on CO 2 selectivity from the CO 2 /H 2 gas mixture. The results indicated that the addition of cyclohexane to 1.0 mol% THF solution shifted the hydrate formation conditions to higher temperatures and lower pressures as compared to those obtained in the presence of 1.0 mol% THF or 1.0 mol% TBANO 3 , and the hydrate based CO 2 selectivity obtained in presence of the mixed THF + CH promoter was enhanced comparing with that obtained in the presence of THF. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect