Selective Dehydration of Glycerol to Hydroxyacetone over Cu-, Ag-, and AgFe-Mordenites

Selective Dehydration of Glycerol to Hydroxyacetone over Cu-, Ag-, and AgFe-Mordenites Научная публикация

Журнал

Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210

Вых. Данные

Год: 2025, DOI: 10.1134/s0023158425600038

Авторы

Shelyapina M.G. ¹ , Zvereva I.A. ¹ , Kryuchkova T.A. ² , Sheshko T.F. ² , Akhmina P.V. ² , Yafarova L.V. ¹ , Antunez-Garcia J. ³ , Petranovskii V. ⁴

Организации

1	Saint Petersburg State University, St. Petersburg, 199034 Russia
2	Peoples’ Friendship University of Russia, Moscow, 117198 Russia
3	Facultad de Ciencias, Universidad Autónoma de Baja California, Carretera Transp. Ensenada-Tijuana, Ensenada, B. C., 22860 México
4	CNyN, Universidad Nacional Autónoma de México, Ensenada, B.C., 22860 México

The increasing demands of the hydroxyacetone (also known as acetol) market require more efficient acetol production technologies. The development of new effective catalysts for glycerol dehydration to acetol at mild condition is an important task. In this study, dehydration of glycerol to acetol on microporous sodium mordenite (MOR) modified by conventional ion exchange with Cu2+, Ag+ and Ag+Fe2+ was investigated within a temperature range from 100 to 250°C. The transition metal content after ion exchange procedure was determined by EDX: 4.6 wt % of Cu for CuMOR, 2.8 wt % of Ag for AgMOR, 2.3 and 0.2 wt % of Ag and Fe, respectively, for AgFeMOR. H2-TPR indicates the presence of different types of active sites (Cu2+, Agnm+, Fe+2). The glycerol conversion and the acetol yield over the zeolite samples increase in the CuMOR < AgFeMOR < AgMOR series. For AgMOR, glycerol conversion achieves ~90% at 175°C (with an acetol yield of about 76%), the presence of Fe2+ reduces the catalytic performance of the catalyst. The copper-exchanged catalyst exhibits the poorest catalytic performance. The proposed reaction mechanism of glycerol dehydration over mordenite involves a preparative step (glycerol as reducing media, forms a catalyst by interacting with cations introduced into the zeolite), and then on these formed neutral metallic sites the conversion of glycerol to the final product occurs; the selectivity of the reaction is mainly determined by steric constraints.

Shelyapina M.G. , Zvereva I.A. , Kryuchkova T.A. , Sheshko T.F. , Akhmina P.V. , Yafarova L.V. , Antunez-Garcia J. , Petranovskii V.
Selective Dehydration of Glycerol to Hydroxyacetone over Cu-, Ag-, and AgFe-Mordenites
Kinetics and Catalysis. 2025. DOI: 10.1134/s0023158425600038 Scopus OpenAlex

Поступила в редакцию:	19 дек. 2024 г.
Принята к публикации:	14 янв. 2025 г.
Опубликована online:	29 апр. 2025 г.

Scopus:	2-s2.0-105003831574
OpenAlex:	W4409921839