Effects of Alkali Element Doping and Synthesis Conditions on the Genesis of the Phase Composition of Alumina–Chromium Catalysts Full article
| Journal |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Output data | Year: 2019, Volume: 60, Number: 1, Pages: 96-105 Pages count : 10 DOI: 10.1134/s0023158419010026 | ||||
| Tags | alumina–chromium catalyst, modifying additives, differential dissolution method, stoichiograms | ||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Federal Agency for Scientific Organizations | 0303-2016-0003 |
Abstract:
The influence of modifying additives and synthesis conditions on the genesis of the phase composition of alumina–chromium catalysts was studied by differential dissolution (DD) and X-ray diffraction (XRD) analysis. The salts of potassium (KNO3) and lithium (LiCl) were added as additives. It was found that the individual nature of the additives affected the formation of phases. Although potassium and lithium cations occur in the same group of the periodic system, they differently react with a phase of γ-Al2O3 in the support: lithium forms a LixAl1 solid solution with the crystallized finely dispersed γ-Al2O3 species, whereas potassium mainly remains on the surface of the finely dispersed Al2O3 species and partially forms potassium aluminate. The interaction of lithium cations with the active component Cr(VI) of the catalyst leads to the formation of lithium chromate analogously to the reaction of the potassium cation with CrO2−4. However, a portion of lithium cations is introduced into the structure of the substitution solid solution of Cr(III) in γ‑Al2O3 to form addition solid solutions (Al1Crx1– x2Liy1 –y2).
Cite:
Chesnokov V.V.
, Boldyreva N.N.
, Dovlitova L.S.
, Zyuzin D.A.
, Parmon V.N.
Effects of Alkali Element Doping and Synthesis Conditions on the Genesis of the Phase Composition of Alumina–Chromium Catalysts
Kinetics and Catalysis. 2019. V.60. N1. P.96-105. DOI: 10.1134/s0023158419010026 WOS Scopus РИНЦ AN OpenAlex
Effects of Alkali Element Doping and Synthesis Conditions on the Genesis of the Phase Composition of Alumina–Chromium Catalysts
Kinetics and Catalysis. 2019. V.60. N1. P.96-105. DOI: 10.1134/s0023158419010026 WOS Scopus РИНЦ AN OpenAlex
Original:
Чесноков В.В.
, Болдырева Н.Н.
, Довлитова Л.С.
, Зюзин Д.А.
, Пармон В.Н.
Влияние допирования щелочными элементами и условий синтеза на генезис фазового состава алюмохромых катализаторов
Кинетика и катализ. 2019. Т.60. №1. С.118-128. DOI: 10.1134/s0453881119010027RSCI РИНЦ OpenAlex
Влияние допирования щелочными элементами и условий синтеза на генезис фазового состава алюмохромых катализаторов
Кинетика и катализ. 2019. Т.60. №1. С.118-128. DOI: 10.1134/s0453881119010027RSCI РИНЦ OpenAlex
Dates:
| Submitted: | May 14, 2018 |
| Accepted: | Sep 28, 2018 |
| Published print: | Jan 1, 2019 |
| Published online: | May 15, 2019 |
Identifiers:
| Web of science: | WOS:000468063400012 |
| Scopus: | 2-s2.0-85066009263 |
| Elibrary: | 41657007 |
| Chemical Abstracts: | 2019:964961 |
| OpenAlex: | W2946744887 |