An inverse gas chromatographic study of the adsorption of alkanes on hydroxyapatite
Апстракт
Saturated alkanes adsorption on synthetic well-crystallized hydroxyapatite was studied by the inverse gas chromatography method, at zero coverage. Hydroxyapatite was prepared from Ca(OH)(2) and H3PO4 aqueous solutions by a slow titration technique. The powder was characterized by XR diffraction, surface area measurement, and chemical analysis. Adsorption of saturated alkanes was investigated in the temperature range 338-353 K, using a flame ionization detector, and nitrogen as a carrier gas. The gas/solid partition coefficients were calculated from the retention data as well as the standard thermodynamic functions of adsorption, Delta H-d(0), Delta S-a(0) and Delta G(a)(0). Linear relationships between lnK and 1/T and between Delta G(a)(0) and the number of carbon atoms in saturated alkanes were observed. The dispersive component of the surface free energy was calculated for the investigated temperature region. A possible analytical application of hydroxyapatite to n-alkanes separation... is given. (C) 2000 Kluwer Academic Publishers.
Извор:
Journal of Materials Science, 2000, 35, 11, 2825-2828
DOI: 10.1023/A:1004795019433
ISSN: 0022-2461
WoS: 000086419700025
Scopus: 2-s2.0-0342572629
Колекције
Институција/група
VinčaTY - JOUR AU - Smičiklas, Ivana D. AU - Milonjić, Slobodan K. AU - Zec, Slavica PY - 2000 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2339 AB - Saturated alkanes adsorption on synthetic well-crystallized hydroxyapatite was studied by the inverse gas chromatography method, at zero coverage. Hydroxyapatite was prepared from Ca(OH)(2) and H3PO4 aqueous solutions by a slow titration technique. The powder was characterized by XR diffraction, surface area measurement, and chemical analysis. Adsorption of saturated alkanes was investigated in the temperature range 338-353 K, using a flame ionization detector, and nitrogen as a carrier gas. The gas/solid partition coefficients were calculated from the retention data as well as the standard thermodynamic functions of adsorption, Delta H-d(0), Delta S-a(0) and Delta G(a)(0). Linear relationships between lnK and 1/T and between Delta G(a)(0) and the number of carbon atoms in saturated alkanes were observed. The dispersive component of the surface free energy was calculated for the investigated temperature region. A possible analytical application of hydroxyapatite to n-alkanes separation is given. (C) 2000 Kluwer Academic Publishers. T2 - Journal of Materials Science T1 - An inverse gas chromatographic study of the adsorption of alkanes on hydroxyapatite VL - 35 IS - 11 SP - 2825 EP - 2828 DO - 10.1023/A:1004795019433 ER -
@article{ author = "Smičiklas, Ivana D. and Milonjić, Slobodan K. and Zec, Slavica", year = "2000", abstract = "Saturated alkanes adsorption on synthetic well-crystallized hydroxyapatite was studied by the inverse gas chromatography method, at zero coverage. Hydroxyapatite was prepared from Ca(OH)(2) and H3PO4 aqueous solutions by a slow titration technique. The powder was characterized by XR diffraction, surface area measurement, and chemical analysis. Adsorption of saturated alkanes was investigated in the temperature range 338-353 K, using a flame ionization detector, and nitrogen as a carrier gas. The gas/solid partition coefficients were calculated from the retention data as well as the standard thermodynamic functions of adsorption, Delta H-d(0), Delta S-a(0) and Delta G(a)(0). Linear relationships between lnK and 1/T and between Delta G(a)(0) and the number of carbon atoms in saturated alkanes were observed. The dispersive component of the surface free energy was calculated for the investigated temperature region. A possible analytical application of hydroxyapatite to n-alkanes separation is given. (C) 2000 Kluwer Academic Publishers.", journal = "Journal of Materials Science", title = "An inverse gas chromatographic study of the adsorption of alkanes on hydroxyapatite", volume = "35", number = "11", pages = "2825-2828", doi = "10.1023/A:1004795019433" }
Smičiklas, I. D., Milonjić, S. K.,& Zec, S.. (2000). An inverse gas chromatographic study of the adsorption of alkanes on hydroxyapatite. in Journal of Materials Science, 35(11), 2825-2828. https://doi.org/10.1023/A:1004795019433
Smičiklas ID, Milonjić SK, Zec S. An inverse gas chromatographic study of the adsorption of alkanes on hydroxyapatite. in Journal of Materials Science. 2000;35(11):2825-2828. doi:10.1023/A:1004795019433 .
Smičiklas, Ivana D., Milonjić, Slobodan K., Zec, Slavica, "An inverse gas chromatographic study of the adsorption of alkanes on hydroxyapatite" in Journal of Materials Science, 35, no. 11 (2000):2825-2828, https://doi.org/10.1023/A:1004795019433 . .