Thermodynamic properties of semiclathrate hydrates formed from the TBAB+TBPB+water and CO2+TBAB+TBPB+water systems

Modeling of the dissociation conditions of H 2 + CO 2 semiclathrate hydrate formed with TBAB, TBAC, TBAF, TBPB, and TBNO 3 salts. Application to CO 2 capture from syngas

“…Despite the very time consuming aspect of the stepwise scheme, this method provides a high accuracy of 0.1 K which is the temperature increment. Further detailed information about the dynamic and stepwise method are available in previous works [36,37].…”

An experimental study on the formation behavior of single and binary hydrates of TBAB, TBAF and TBPB for cold storage air conditioning applications

“…The formation temperature of hydrates formed from TBA + and TBP + salt solutions as a function of salt mass fraction are illustrated in Figure 4, compared with the phase equilibrium data determined from dissociation [12,14,17,18,41,42]. As can be seen, the formation temperature of TBAF hydrate is overall much higher than that of the other two across the entire mass fraction range that was studied.…”

“…In other cases, the formation temperature increases in the TBAB+TBPB system as the proportion of TBAB rises. This is owing to the fact that the size and shape of TBA + can better fit to the framework of semi-clathrate hydrate than TBP + [17]. Moreover, the butyl group of TBA + can be trapped not only in large T cavities (5 12 6 2 , consisting of 12 pentagonal and 2 hexagonal faces) and P cavities (5 12 6 3 , consisting of 12 pentagonal and 3 hexagonal faces) but also in small D cavities (5 12 , 12 pentagonal dodecahedron) of water lattice [43], revealing better thermodynamic stability.…”

“…Some researchers also employed differential thermal analysis (DTA) and differential scanning calorimetry (DSC) to dissociate hydrates with small steps of temperature [17][18][19]. Even though stepwise method is considered accurate to determine phase equilibrium, each step would take a long time to achieve the steady state.…”

Thermal conductivities of methane–methylcyclohexane and tetrabutylammonium bromide clathrate hydrate

“…Storage of methane or hydrogen in sH hydrates or semi-clathrates is relatively more stable compared to other storage techniques [10][11][12][13][14][15][16]. In addition, TBAB hydrates are potentially important for industrial applications such as cold storage, gas separation, and gas storage.…”