جستجوی مقالات مرتبط با کلیدواژه « هیدرات های شبه کلاتریت » در نشریات گروه « مهندسی شیمی، نفت و پلیمر »

Induction time and the amount of gas consumed, two important kinetic parameters in gas hydrate formation process, were investigated for the systems of water methane and water TBAC methane, in this research. In order to study the effect of TBAC on the kinetics of methane hydrate formation, three aqueous solutions of TBAC with concentrations of (0, 3, and 5) wt% were prepared. The experiments were carried out (or done) in a 169 cm3 batch reactor and at a temperature of 278.15 K and initial pressures of (6.5 and 8) MPa. The results showed that adding TBAC decreases the induction time of hydrate formation process. The utilization of TBAC with concentration of 3 wt% at 8 MPa decreases the induction time from 437 min to 3 min and increases the amount of gas consumed during hydrate formation %47.09, compared to pure water. The experimental results showed that by increasing the pressure form 6.5 MPa to 8 MPa, the induction time of methane hydrate formation decreases, and the amount of methane consumed increases. In addition, by increasing the pressure form 6.5 MPa to 8 MPa in aqueous solution of TBAC with concentration of 3 wt%, the induction time decreases from 41 min to 4.12 min and the amount of methane consumed increases from 20.98 mmol/mol of solution to 28.29 mmol/mol of solution

According to Kyoto protocol, carbon dioxide is one of the six large greenhouse gases which causes global warming. Therefor it is very important to prevent it from entering the atmosphere. The gas hydrate technology is one of the newest methods of carbon dioxide separation, but slow kinetics of this technology is one of the major obstacles to industrialize the process. The induction time of carbon dioxide hydrate formation and the amount of gas have been consumed for the systems of water carbon dioxide and water TBAF carbon dioxide were measured in this research. The experiments were done in a 169 cm3 batch reactor and at temperature 278.15 K and initial pressure 3.8 MPa. Utilization of 5 wt% TBAF decreases the induction time of hydrate formation from 73 min to 0.9 min. The amount of carbon dioxide consumed within 40 min and 350 min of experiments was measured and reported. Utilization of 1, 4, and 5 wt% TBAF within 40 min of experiments increase the amount of carbon dioxide consumed 18.5% ,39.3%, and 71.9%, respectively.