Fast synthesis of MgO–Al2O3 systems: effect on physicochemical characteristics and catalytic properties in Guerbet condensation of ethanol

Valihura, Karina V.; Larina, Olga V.; Kyriienko, Pavlo I.; Yaremov, P. S.; Khalakhan, Ivan; Trachevskiy, Volodymyr V.; Soloviev, Sergiy O.; Orlyk, S. M.

doi:10.1007/s13204-023-02801-w

Cited by 1 publication

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“…The structure of each catalyst was determined using the XRD technique, as shown in Figure . The significant broad peaks at approximately 43 and 62° in the XRD pattern of the MgAlO catalyst without strontium in Figure a were ascribed to a periclase MgO phase, , which was formed during the calcination of MgAl-LDH. − The MgO phase was also seen in the other catalysts impregnated with strontium molecules. However, the Al 2 O 3 phase was not observed because the MgO phase is more crystalline than Al 2 O 3 , leading to a reduction in the peak of Al 2 O 3 and resulting in a peak overlap. − The peak of strontium oxide (SrO) and strontium hydroxide [Sr(OH 2 )] was clearly detected when the molar ratio of strontium was increased.…”

Section: Resultsmentioning

confidence: 96%

Effect of Strontium Modification in Mg–Al Mixed Oxide Catalysts on Product Distribution toward Catalytic Reaction of Ethanol

Seekhiaw,

Jantasee,

Praserthdam

et al. 2023

ACS Omega

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The aim of this research was to examine the effect of strontium content in the MgAlO catalyst for the catalytic ethanol reaction on the product distribution. The structure of the catalysts and the actual amount of strontium on the catalysts were verified using XRD and ICP techniques, respectively. The acid and basic strength characteristics of catalysts were examined using NH 3 -TPD and CO 2 -TPD techniques, respectively. The strontium content was found to influence the textural properties and the acidic and basic characteristics of the catalysts, leading to differences in product selectivity and ethanol conversion. The MgAlO catalyst with 1.9 wt % strontium provided the maximum ethylene and butanol selectivity, probably due to the presence of appropriate medium acidic and strong basic sites. All catalysts can efficiently produce ethylene by a dehydration reaction and acetaldehyde by a dehydrogenation reaction. Acetaldehyde selectivity was dominant with increased strontium loading.

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