Hydrate-based pre-combustion capture of carbon dioxide in the presence of a thermodynamic promoter and porous silica gels

Hydrate-based CO2 capture and CH4 purification from simulated biogas with synergic additives based on gas solvent

“…It is well agree with the results reported by Sum et al [50]. On the other hand, for the hydrate phase formed from the simulated biogas and THF-DMSO, the Raman peaks at 1274 cm À1 and 1381 cm À1 are correspond to CO 2 gas enclathrated in the structure II hydrate, which is attributed to the inclusion of THF into the hydrate lattices [15]. While in the case of the simulated biogas mixture hydrate formed with TBAB-DMSO, the peak at 1286 cm À1 was observed shift to 1278 cm À1 except that the peak at 1381 cm À1 was the same position as that of the THF-DMSO case.…”

Gas Hydrate Growth Kinetics: A Parametric Study

“…Clearly, increased fluid volumes in an industrial-scale reactor would require power demands that may not be economically efficient for stirred tank reactors [54]. The use of silica gels offers a potential option to improve the gas-liquid mass transfer without the need for stirring [6,24,28,52]. Adeyemo et al [28] obtained increased water conversion rates and up to 45% water converted to hydrate after four hours by contacting flue gas and fuel gas mixtures with water dispersed in silica gel in a fixed bed column for CO 2 capture.…”

“…More recently, there has been increased interest in the potential applications of gas-hydrate-related technology in the areas of gas separation [5][6][7][8][9][10][11], gas transportation and storage [12][13][14][15][16][17][18][19][20][21][22][23], CO 2 capture and sequestration [11,13,[17][18][19][20][21][22][23][24][25][26][27][28][29][30], and as a potential energy source [20,[31][32][33][34]. In the area of gas transportation and storage, gas hydrate technology offers simplicity and safer conditions.…”

Semiclathrate-based CO2 capture from flue gas mixtures: An experimental approach with thermodynamic and Raman spectroscopic analyses

“…In addition, the QAS semiclathrates have small 5 12 cages which are left vacant and thus, can be used for capturing small-sized gas molecules [19,22,23,[25][26][27][28][31][32][33][34][35][36][37][38][39][40][41]. Due to their significant thermodynamic stability and guest gas enclathrating ability, QAS semiclathrates have been investigated as an alternative to gas hydrates for gas storage and separation [23,27,31,[42][43][44][45][46][47][48].…”

“…Most studies on QAS semiclathrates have covered semiclathrate phase equilibria for a single guest gas primarily focusing on TBAB semiclathrates and semiclathrate formation kinetics for pre-combustion CO 2 capture [36,42,[44][45][46][47][48]. However, preferential partitioning of guest gases, gas storage capacity, and guest gas enclathration behavior in QAS semiclathrates for post-combustion CO 2 capture have not been examined thoroughly.…”