Surface Heterogeneity of Carbon-Silica Adsorbents Studied on the Basis of the Complex Adsorption Investigations | Sciact - CRIS-система Института катализа

Surface Heterogeneity of Carbon-Silica Adsorbents Studied on the Basis of the Complex Adsorption Investigations Научная публикация

Журнал

Colloids and Surfaces A: Physicochemical and Engineering Aspects
ISSN: 0927-7757

Вых. Данные

Год: 2003, Том: 213, Номер: 1, Страницы: 45-57 Страниц : 13 DOI: 10.1016/S0927-7757(02)00338-2

Ключевые слова

Adsorption, Adsorption energy distribution, Adsorption properties, Coke, CVD

Авторы

Puziy Alexander M. ¹ , Charmas Barbara ² , Poddubnaya Olga I. ¹ , Mel'gunov Maxim S. ³ , Leboda Roman ² , Trznadel Bogdan J. ⁴

Организации

1	Institute for Sorption and Problems of Endoecology, Naumov Street 13, 03164 Kiev, Ukraine
2	Department of Chemical Physics, Faculty of Chemistry, Maria Curie-Sklodowska University, 20-031 Lublin, Poland
3	Boreskov Institute of Catalysis, Prospect Akad. Lavrentieva 5, 630090 Novosibirsk, Russia
4	Military Institute of Chemistry and Radiometry, Avenue gen. A. Chrusciela 105, 00-910 Warsaw, Poland

Информация о финансировании (2)

1	North Atlantic Treaty Organization	EST.CLG 976890
2	Ministry of Science and Higher Education	3 T09A 036 11

Silica-gel (SG) Si-60 was coated by pyrolytic coke using CVD from methylene chloride. The porous structure of carbon–silica adsorbents (carbosils) was analyzed on the basis of nitrogen adsorption isotherms at 77 K. It has been shown that carbosils are mesoporous adsorbents with complete absence of micropores. Total pore volume and surface area decrease during the carbon deposition on silica surface. Heterogeneity of surface of carbosil samples was estimated by adsorption energy distribution (AEDs) calculated from adsorption isotherms of nitrogen at 77 K and hexane, cyclohexane, benzene and chloroform adsorption isotherms at 473 and 483 K. AEDs were obtained by solving Adsorption Integral Equation with Hill-de Boer kernel function. N2 AEDs show that distribution of silica active surface sites responsible for N2 adsorption at 77 K is not altered during the carbon deposition. However, coke deposition leads to improving of polar–apolar surface composition, resulting in increase of adsorption of apolar (hexane) and decrease of adsorption of polar (chlorophorm) substances. The main changes observed in AEDs are connected with decreasing of silica accessible area at stable carbon structure during CVD of carbon.

Puziy A.M. , Charmas B. , Poddubnaya O.I. , Mel'gunov M.S. , Leboda R. , Trznadel B.J.
Surface Heterogeneity of Carbon-Silica Adsorbents Studied on the Basis of the Complex Adsorption Investigations
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2003. V.213. N1. P.45-57. DOI: 10.1016/S0927-7757(02)00338-2 WOS Scopus РИНЦ CAPlusCA OpenAlex

Поступила в редакцию:	24 окт. 2001 г.
Принята к публикации:	4 июл. 2002 г.
Опубликована online:	8 окт. 2002 г.
Опубликована в печати:	4 февр. 2003 г.

Web of science:	WOS:000182771400006
Scopus:	2-s2.0-0347295971
РИНЦ:	13441952
Chemical Abstracts:	2003:28026
Chemical Abstracts (print):	138:391204
OpenAlex:	W2054822197

БД	Цитирований
Web of science	7
Scopus	8
РИНЦ	8
OpenAlex	7