Determination of the Surface Properties of Illites and Kaolinites by Inverse Gas Chromatography

Saada, Alain; Papirer, E.; Balard, H.; Siffert, Bernard

doi:10.1006/jcis.1995.1448

Cited by 62 publications

(41 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The cause of the deviation cannot be explained by enthalpic effects, but rather are attributable to the particular behavior of their molecules. 15) Similar observations, such as negative values of ÀÁG SP A for benzene and carbon tetrachloride, have been reported in other studies. 15,16) Hence, we evaluated the K A and K D parameters using only the values of chloroform, nitromethane, ethyl acetate and THF, without those of benzene and carbon tetrachloride.…”

Section: Resultssupporting

confidence: 85%

Determination of Acid-Base Properties of Silicas by Inverse Gas Chromatography: Variation with Surface Treatment

Yang

Yoon

2007

Mater. Trans.

View full text Add to dashboard Cite

The specific component of the free energy of adsorption, ÀÁG SP A , of untreated crystalline and fused silica, and four types of silane coupling agents-treated fused silicas, were estimated by the inverse gas chromatography (IGC) method, using the adsorption of several polar and nonpolar probes on their surfaces at various measuring temperatures. The acid-base properties of the untreated and surface-treated silicas were quantified by their K A and K D parameters, reflecting the ability of the surface to act as an electron acceptor and donor, respectively. Acidic components were detected on the untreated crystalline and fused silica surfaces, but the surface properties of the fused silicas surface-treated with -glycidoxy propyl trimethoxy silane (GMS) and -amino propyl triethoxy silane (AES) were slightly basic, and those of the fused silicas surface-treated with -methacryloxy propyl trimethoxy silane (MTMS) and -mercapto propyl trimethoxy silane (MCMS) were amphoteric.

show abstract

Section: Resultssupporting

confidence: 85%

Determination of Acid-Base Properties of Silicas by Inverse Gas Chromatography: Variation with Surface Treatment

Yang

Yoon

2007

Mater. Trans.

View full text Add to dashboard Cite

show abstract

“…But it is not easy to measure the surface energy of divided solids with standard methods, such as the contact angle evaluation of liquid drops deposited on an oriented clay deposit (Chassin et al 1986), or the evaluation of this liquid contact angle value from the ascending capillary rate of a liquid penetrating into a capillary column packed with the clay (van Oss 1993). The surface properties of clays can also be determined by a chromatographic method (Saada, Siffert, Balard and Papirer 1995). Thus, ~/~ could be measured on various minerals.…”

Section: Introductionmentioning

confidence: 99%

Influence of Water on the Retention of Organic Probes on Clays Studied by IGC

Balard

1997

Clays and clay miner.

View full text Add to dashboard Cite

Abstract--Oil recovery is strongly related to the wettability of reservoir rocks that are formed of quartz grains attached by mineral hydroxides and clay minerals. Illites and kaolinites are the most active due to their high specific surface areas and electrical charge densities. Therefore, these minerals' relative affinities for oil or water when in contact with a water-oil mix are of great importance. In order to model such a complex system, we used a mix of organic model molecules of the oil constituents and water vapor. Their interactions were estimated by inverse gas chromatography (IGC). IGC experiments were performed using a carrier gas with controlled humidity. By means of IGC at infinite dilution conditions, the dispersive component of the surface energy, ~/~, was determined. A strong decrease of .yd, due to water molecules shielding the highest-energy sites, was observed. The energetic surface heterogeneity of the clays was examined using IGC at finite concentration conditions, allowing the determination of organic probe adsorption isotherms in the presence of water. From these isotherms, adsorption energy distribution functions were computed for propanol-2 and pyridine probes. Water mainly modifies the illite distribution functions, whereas practically no change was observed in the case of kaolinite. This observation is related to the higher hydrophilicity of illite as compared with kaolinite, and explains the different behaviors of the 2 clay families in oil reservoirs.

show abstract

“…[9] but valid for the interaction of an pound 1 and 2 if their parameters C 11 However, molecules as big as CCl 4 or bigger can no longer transfer the free energy per unit area into a free energy per mol be regarded as small molecules (17, p. 160), so that Eq. [10] Tables 1 and 2 show that this difference are only possible between interaction partners with compliis only of theoretical importance in IGC as long as Eq. [4] mentary acid-base properties, i.e., between an electron dois used with the adjusted values of CA CH 2 .…”

Section: Introductionmentioning

confidence: 96%

“…The contact area CA CH 2 of a CH 2 group is taken mann's acceptor numbers (AN or AN* (according to (18)) as 6 Å 2 (7). Dorris and Gray found that the values for g vdW and donor numbers (DN) (2,4,10,19) which are related of a surface determined by Eqs. [3] and [4] from IGC to the heat of the acid-base interactions.…”

Section: Introductionmentioning

confidence: 99%

Considerations about the Adsorption of Organic Molecules from the Gas Phase to Surfaces: Implications for Inverse Gas Chromatography and the Prediction of Adsorption Coefficients

Goss

1997

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

Determination of the Surface Properties of Illites and Kaolinites by Inverse Gas Chromatography

Cited by 62 publications

References 0 publications

Determination of Acid-Base Properties of Silicas by Inverse Gas Chromatography: Variation with Surface Treatment

Determination of Acid-Base Properties of Silicas by Inverse Gas Chromatography: Variation with Surface Treatment

Influence of Water on the Retention of Organic Probes on Clays Studied by IGC

Considerations about the Adsorption of Organic Molecules from the Gas Phase to Surfaces: Implications for Inverse Gas Chromatography and the Prediction of Adsorption Coefficients

Contact Info

Product

Resources

About