Properties of Ca(OH)2/TiO2 composites modified by mechanochemical and ultrasonic methods
Authors:
- O. V. Sachuk,
- V. A. Zazhigalov,
- O. A. Diyuk,
- P. Dulian,
- V. L. Starchevskyy,
- L. S. Kuznetsova,
- O. V. Kizyun
Abstract
We study the influence of ultrasonic (1 h) and mechanochemical (4 h) treatments (UST and MCT, respectively) on the physicochemical properties of a Ca(OH)2/TiO2 system with molecular ratio 1:1. The effect of refinement of the source components of the mixture after UST and the formation of the calcium-titanate phase after MCT were recorded by the X-ray phase diffraction method. By analyzing the porous structure, we reveal an increase in the specific surface area and the total volume of pores caused by the activation of powders. By the SEM method, we detected the formation of much smaller crystals as a result of UST and the appearance of elongated prismatic crystals after mechanochemical activation. The catalytic properties of Ca(OH)2/TiO2 samples were studied for the reaction of selective oxidation of ethanol. It is shown that, at low temperatures, the main reaction product is acetaldehyde (S = 100% at 240°C). As the reaction temperature increases, we observe the formation of hydrogen with a maximum product yield of 32–38% and a productivity of 126 LH2/(h⋅kgcat).
- Record ID
- CUT29005d2c37f8415e99ae1b71248b5b4d
- Publication categories
- ;
- Author
- Journal series
- Materials Science, ISSN 1068-820X, e-ISSN 1573-885X
- Issue year
- 2022
- Vol
- 57
- No
- 6
- Pages
- 873-881
- Other elements of collation
- rys.; tab.; wykr.; Bibliografia (na s.) - 880-881; Bibliografia (liczba pozycji) - 14; Oznaczenie streszczenia - Streszcz. ang.; Numeracja w czasopiśmie - Vol. 57, No. 6
- Substantive notes
- Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 57, No. 6, pp. 109–116, November–December, 2021. Original article submitted October 19, 2020.
- Keywords in English
- acetaldehyde, activation, calcium titanate, ethanol, hydrogen
- ASJC Classification
- ; ; ;
- DOI
- DOI:10.1007/s11003-022-00621-x Opening in a new tab
- URL
- https://link.springer.com/article/10.1007/s11003-022-00621-x Opening in a new tab
- Language
- eng (en) English
- Score (nominal)
- 40
- Score source
- journalList
- Score
- Publication indicators
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT29005d2c37f8415e99ae1b71248b5b4d/
- URN
urn:pkr-prod:CUT29005d2c37f8415e99ae1b71248b5b4d
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