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Synthesis and Characterization of Lanthanum-Modified Pseudoboehmite - The Precursor of Alumina Supports and Catalysts Full article

Journal Microporous and Mesoporous Materials
ISSN: 1387-1811 , E-ISSN: 1873-3093
Output data Year: 2022, Volume: 335, Article number : 111800, Pages count : 11 DOI: 10.1016/j.micromeso.2022.111800
Tags Flash calcination; Pseudoboehmite; Alumina; Modification; Lanthanum; Hydrotreating
Authors Danilevich V.V. 1 , Nadeina K.A. 1 , Gerasimov E.Yu 1 , Shefer K.I. 1 , Klimov O.V. 1 , Noskov A.S. 1
Affiliations
1 Boreskov Institute of Catalysis SB RAS, Russian Federation

Funding (1)

1 Ministry of Science and Higher Education of the Russian Federation 0239-2021-0006

Abstract: The present work shows that the introduction of 0.25–1.25 wt.% lanthanum to the composition of aluminum hydroxide at the stage of its hydrothermal synthesis allows increasing the content of the pseudoboehmite phase in the product up to 95 wt.% and, as a consequence, reduces the content of the “amorphous” component. Lanthanum uniformly distributes over the surface of aluminum hydroxide as isolated cations with a surface density of 10–15 cations per 10 nm2. During plasticizing of lanthanum-modified pseudoboehmite followed by granulation and heat treatment, the formation of the oxide form of La is not observed, and the cations retain their isolated state. The specific surface area of La-modified alumina increases by 18–26 m2/g compared to the unmodified sample, while the pore volume remains the same and the average pore diameter slightly reduces. It was found that when the content of La in pseudoboehmite was 1 wt.%, the temperature of reaching a residual sulfur content of 10 ppm in the hydrotreated diesel fuel was 5 °C lower comparing to the unmodified sample.
Cite: Danilevich V.V. , Nadeina K.A. , Gerasimov E.Y. , Shefer K.I. , Klimov O.V. , Noskov A.S.
Synthesis and Characterization of Lanthanum-Modified Pseudoboehmite - The Precursor of Alumina Supports and Catalysts
Microporous and Mesoporous Materials. 2022. V.335. 111800 :1-11. DOI: 10.1016/j.micromeso.2022.111800 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
Submitted: Dec 8, 2021
Accepted: Mar 4, 2022
Published online: Mar 10, 2022
Published print: Apr 1, 2022
Identifiers:
Web of science: WOS:000819949600005
Scopus: 2-s2.0-85126115250
Elibrary: 48189900
Chemical Abstracts: 2022:702130
Chemical Abstracts (print): 178:126085
OpenAlex: W4220750044
Citing:
DB Citing
Scopus 7
Elibrary 7
Web of science 6
OpenAlex 5
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