Distribution of Copper and NickelContaining Modifier Components in the Pore Space of HZSM5 Zeolite Full article
| Journal |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Output data | Year: 2010, Volume: 51, Number: 1, Pages: 88-97 Pages count : 10 DOI: 10.1134/S0023158410010155 | ||
| Tags | SELECTIVE REDUCTION; ZSM-5 ZEOLITES; NO; Cu-ZSM-5; AROMATIZATION; CATALYSTS; ION; NI; DECOMPOSITION; HYDROLYSIS | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Russian Foundation for Basic Research | 06-03-33107 |
Abstract:
The distribution of copper- and nickel-containing components in the pore space of HZSM-5 zeolite was quantitatively studied. It was found that the detailed distribution of a modifier in the micropore and mesopore volumes of the zeolite depends on both the chemical nature of the modifier and the conditions of supporting and the regime of M2+ polycondensation in the pore space of the zeolite. The experimental data on the low-temperature adsorption of nitrogen on Cu(n)ZSM-5 catalysts can be interpreted as the result of the partial filling of the zeolite micropore space (10 vol %) and the finest mesopores with D < 3 nm with the modifier. In the case of Ni(n)ZSM-5 catalysts, the penetration of the modifier into zeolite channels (micropores) in detectable amounts was not found, and it was arranged in mesopores on the surface of zeolite crystallites. The reason for differences between modifier distributions in the pore structure of the zeolite was explained from the standpoint of different structures of copper and nickel polyhydroxo complexes in impregnating solutions after polycondensation. It was found that, in the Cu(n)ZSM-5 and Ni(n)ZSM-5 catalysts, the modifier component contained copper and nickel only in a doubly charged state and mainly octahedral oxygen environments. In this case, three-dimensional nanoparticles or coarsely dispersed particles of CuO were not detected in the pore space of the support, whereas the presence of a small amount of sufficiently large NiO crystals with a coherent-scattering region of 80–100 nm was detected in Ni(n)ZSM-5, and these crystals occurred on the surface of zeolite crystals. It was found that the apparent density of a copper-or nickel-containing component arranged in the pore space of the zeolite was lower than the density of the bulk CuO and NiO phases by a factor of ∼3 and 4, respectively, because of the size effect.
Cite:
Gavrilov V.Y.
, Krivoruchko O.P.
, Larina T.V.
, Molina I.Y.
, Shutilov R.A.
Distribution of Copper and NickelContaining Modifier Components in the Pore Space of HZSM5 Zeolite
Kinetics and Catalysis. 2010. V.51. N1. P.88-97. DOI: 10.1134/S0023158410010155 WOS Scopus РИНЦ ANCAN OpenAlex
Distribution of Copper and NickelContaining Modifier Components in the Pore Space of HZSM5 Zeolite
Kinetics and Catalysis. 2010. V.51. N1. P.88-97. DOI: 10.1134/S0023158410010155 WOS Scopus РИНЦ ANCAN OpenAlex
Original:
Гаврилов В.Ю.
, Криворучко О.П.
, Ларина Т.В.
, Молина И.Ю.
, Шутилов Р.А.
Исследование распределения медь- и никельсодержащих модифицирующих компонентов в пористом пространстве цеолита НZSM-5
Кинетика и катализ. 2010. Т.51. №1. С.95-105. РИНЦ
Исследование распределения медь- и никельсодержащих модифицирующих компонентов в пористом пространстве цеолита НZSM-5
Кинетика и катализ. 2010. Т.51. №1. С.95-105. РИНЦ
Dates:
| Submitted: | Aug 6, 2008 |
| Published print: | Feb 1, 2010 |
| Published online: | Mar 17, 2010 |
Identifiers:
| Web of science: | WOS:000275703300015 |
| Scopus: | 2-s2.0-77952086824 |
| Elibrary: | 15324568 |
| Chemical Abstracts: | 2010:327014 |
| Chemical Abstracts (print): | 154:244700 |
| OpenAlex: | W2016719292 |