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Nitrogen adsorption at ca. 77.4 K on partially hydrated and anhydrous α-Al 2 O 3. / Mel’gunov, Maxim S.; Ayupov, Artem B.; Krapivina, Elena A. и др.
в: Adsorption, Том 25, № 3, 04.2019, стр. 601-611.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Nitrogen adsorption at ca. 77.4 K on partially hydrated and anhydrous α-Al 2 O 3
AU - Mel’gunov, Maxim S.
AU - Ayupov, Artem B.
AU - Krapivina, Elena A.
AU - Mel’gunova, Elena A.
PY - 2019/4
Y1 - 2019/4
N2 - N 2 adsorption isotherms at ca. 77 K on macroporous α-Al 2 O 3 have been measured and analyzed in the frameworks of the classic thermodynamic approach, with independent experimental data obtained by means of SEM-EDX, XRD, TGA, helium pycnometry, and mercury porosimetry taken into account. It is shown, that presence of adsorbed water considerably influences N 2 adsorption, which gradually increases with temperature of the degas treatment. Simultaneously, the shape of the isotherms has a trend to change from Type II to Type VI, that assumes changing of adsorption mechanism from progressive increasing of the adsorbed layer thickness towards layer-by-layer adsorption. Corrected and smoothed isotherms are presented in the tabular form as reference for subsequent more comprehensive analysis using molecular statistical approaches.
AB - N 2 adsorption isotherms at ca. 77 K on macroporous α-Al 2 O 3 have been measured and analyzed in the frameworks of the classic thermodynamic approach, with independent experimental data obtained by means of SEM-EDX, XRD, TGA, helium pycnometry, and mercury porosimetry taken into account. It is shown, that presence of adsorbed water considerably influences N 2 adsorption, which gradually increases with temperature of the degas treatment. Simultaneously, the shape of the isotherms has a trend to change from Type II to Type VI, that assumes changing of adsorption mechanism from progressive increasing of the adsorbed layer thickness towards layer-by-layer adsorption. Corrected and smoothed isotherms are presented in the tabular form as reference for subsequent more comprehensive analysis using molecular statistical approaches.
KW - Alumina
KW - Corundum
KW - N
KW - Reference adsorption
KW - DISTRIBUTIONS
KW - N-2
KW - AREA
KW - PORE SYSTEMS
KW - SURFACE
KW - CATALYSTS
UR - http://www.scopus.com/inward/record.url?scp=85062968317&partnerID=8YFLogxK
U2 - 10.1007/s10450-019-00055-z
DO - 10.1007/s10450-019-00055-z
M3 - Article
AN - SCOPUS:85062968317
VL - 25
SP - 601
EP - 611
JO - Adsorption
JF - Adsorption
SN - 0929-5607
IS - 3
ER -
ID: 18863954