Novel Complex Titanium NASICON-Type Phosphates as Acidic Catalysts for Ethanol Dehydration

Zhukova, A.I.; Asabina, E.A.; Kharlanov, A.N.; Osaulenko, D.A.; Chuklina, S.G.; Zhukov, D.Y.; Pet’kov, V.I.; D, V.D.

Авторы: Zhukova A.I., Asabina E.A., Kharlanov A.N., Osaulenko D.A., Chuklina S.G., Zhukov D.Yu, Pet’kov V.I., D V.Deyneko
Журнал: Catalysts
Том: 13
Номер: 1
Год издания: 2023
Первая страница: 1
Последняя страница: 15
Номер статьи: 185
DOI: 10.3390/catal13010185
Аннотация: The conversion of ethanol towards ethylene and diethyl ether in the presence of catalystsrequires special consideration from the perspective of green chemistry. Ethanol dehydrationwas studied on a complex titanium phosphate MAlTiP (M0.5(1+x)AlxTi2-x(PO4)3 with M = Ni, Mn(x = 0; 0.2)) catalysts, alongside a NASICON-type structure synthesized by the sol–gel method. Theinitial catalysts were characterized by N2 gas sorption, SEM, XRD and spectroscopic methods (Ramanand DRIFT of adsorbed CO and C6H6). The results revealed that all catalysts exhibited high activityand selectivity at 300–420 C. The conversion of ethanol increases with the reaction temperature,reaching 67–80% at 420 C. The MnAlTiP exhibited the highest ethylene selectivity among othercatalysts, with 87% at 420 C. The aluminum modification improved the acid properties of thecatalysts, due to the appearance of Lewis acid sites (LAS) and the strength moderate Brønsted acidsites (BAS). It was shown that the activity of complex phosphates in ethanol dehydration increaseswith the strength of the Brønsted acid sites (BAS).
Добавил в систему: Харланов Андрей Николаевич

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