Effect of the porous structure and the presence of amino groups on selective adsorption of methane, ethane, and carbon dioxide on zirconium-based UiO-66 structures

Effect of the porous structure and the presence of amino groups on selective adsorption of methane, ethane, and carbon dioxide on zirconium-based UiO-66 structures Научная публикация

Журнал

Microporous and Mesoporous Materials
ISSN: 1873-3093 , E-ISSN: 1387-1811

Вых. Данные

Год: 2026, Том: 400, Номер статьи : 113880, Страниц : DOI: 10.1016/j.micromeso.2025.113880

Авторы

Deyko Gregory S. ¹ , Vergun Vadim V. ¹ , Kravtsov Leonid A. ¹ , Kapustin Gennadiy I. ¹ , Glukhov Lev M. ¹ , Sinyashin Oleg G. ^2,3 , Kustov Leonid M. ^4,1

Организации

1	Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky, Prospekt 47, Moscow 119991, Russia
2	Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, 420088 Kazan, Russia
3	Federal Research Center Kazan Scientific Center of Russian Academy of Sciences, 420111 Kazan, Russia
4	Chemistry Department, Lomonosov Moscow State University, 119991, Moscow, Russia

Информация о финансировании (1)

UiO-66 and NH2-UiO-66 materials with different porosity (microporous and mesoporous) prepared by solvothermal and microwave synthesis were compared in methane, ethane, and CO2 adsorption for the first time. Both microporous samples with or without amino groups exhibit significantly higher methane, ethane, and carbon dioxide uptakes (up to 30 %) compared to the corresponding mesoporous materials. Highest uptake of ethane and methane (6.75 mmol/g and 3.59 mmol/g at 20 atm, respectively) and carbon dioxide (13.89 mmol/g at 30 atm) were obtained on microporous micro-UiO-66 sample, while on its amino-functionalized microporous analog micro-NH2-UiO-66 the uptake values for all 3 mentioned gases are somewhat lower (4.46 mmol/g of ethane, 2.44 mmol/g of methane at 20 atm and 6.96 mmol/g of carbon dioxide at 30 atm). Adsorption of both hydrocarbons and carbon dioxide decreases in the following order: micro-UiO-66 > meso-UiO-66 > micro-NH2-UiO-66 > meso-NH2-UiO-66. The ideal selectivity and IAST selectivity were calculated for the first time for these materials. The maximum ideal selectivity was obtained for the micro-UiO-66 sample (3.17 : 1 for C2H6/CH4 at 5 atm). The best IAST selectivity was found for the micro-UiO-66 sample (7.94 : 1 for C2H6/CH4 at 15 atm), i.e. UiO-66 is a good candidate for natural gas separation. The presence of amino groups significantly enhances the IAST selectivity for the carbon dioxide/methane pair.

Deyko G.S. , Vergun V.V. , Kravtsov L.A. , Kapustin G.I. , Glukhov L.M. , Sinyashin O.G. , Kustov L.M.
Effect of the porous structure and the presence of amino groups on selective adsorption of methane, ethane, and carbon dioxide on zirconium-based UiO-66 structures
Microporous and Mesoporous Materials. 2026. V.400. 113880 . DOI: 10.1016/j.micromeso.2025.113880 WOS Scopus OpenAlex

Web of science:	WOS:001593155700001
Scopus:	2-s2.0-105017844351
OpenAlex:	W4414695461

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