CO2 capture by hydrate crystallization – A potential solution for gas emission of steelmaking industry

Equilibrium Conditions for Semiclathrate Hydrates Formed with CO2, N2, or CH4 in the Presence of Tri-n-butylphosphine Oxide

“…Also plotted in Figure 3 are the data reported by Lee et al 19 , Mohanmmadi et al 25 and Duc et al 9 using the same method. As shown in Figure 3, the data obtained in the present work are in good agreement with those reported in refs 19,25 , and these three sets of data fall essentially on the same line.…”

“…In other words, SCHs are capable of selectively incorporating small gas guest molecules within the small cavities of the SCHs. Unlike ordinary hydrates having well defined structures (Structure I, Structure II, and Structure H), SCHs have diverse structures and have hydrogen-bonding interaction between guests and hosts molecules, which is much stronger than the van der Waals force in ordinary hydrates 5 SCHs have drawn increasingly more interest from researchers for their potential applications in hydrogen storage 8 , carbon dioxide storage 9 , and gas separation [10][11][12][13][14] . The thermodynamic data of SCHs are limited, and the majority of them are for TBAB 8,[15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] .…”

Design of Ecological CO2 Enrichment System for Greenhouse Production using TBAB + CO2 Semi-Clathrate Hydrate

“…Equilibrium pressures of mixed-gas hydrates are also moderated by these hydrate formation promoters (Figure 2). Generally, there are two types of hydrate formation promoters: chemical additives for gas hydrate that have no effect on structures of the water cages (e.g., tetrahydrofuran, cyclopentane, and anionic/non-ionic surfactants), and SC types such as TBA salts that form SC [24,25,41]. These additives reduce hydrate formation pressures.…”

Clathrate Hydrate Equilibrium Data for the Gas Mixture of Carbon Dioxide and Nitrogen in the Presence of an Emulsion of Cyclopentane in Water

“…Among well-known thermodynamic promoters, such as tetra-nbutylammonium bromide, (C 4 H 9 ) 4 NBr (TBAB), [2][3][4][5][6] or tetrahydrofuran, (CH 2 ) 4 O (THF), [7][8][9][10][11][12][13] cyclopentane, C 5 H 10 (CP), is described in the literature as the strongest organic thermodynamic promoter. 14 When present in mixtures along with water, CP forms structure sII hydrates in which cyclopentane could occupy the large cavities whereas the small molecules could get trapped in the small cavities.…”