Effect of substituting Fe by Mn in GdFeO3 perovskite catalyst for CO hydrogenation

Gd(Fe,Mn)O3 nanoperovskites were prepared by sol-gel method and were characterized using different techniques: XRD, SEM+EDX, BET, TG to study structure and morphology. Oxidation states of Fe and Mn were determined by XPS. The performance of GdFe1-xMnxO3 perovskite catalysts with different Mn substitution levels was evaluated in the CO hydrogenаtion for light olefins production. The complex of physico-chemical methods showed that all investigated samples confirmed the presence of a single phase with perovskite-type structure. Experimental data suggested that catalysts can operate over a wide temperature range without any loss of activity and are practically unaffected by surface carbonation; their phase composition and morphology of the surface change insignificantly in catalytic processes at high temperature (~ 673 K). It was determined that the introduction of manganese into perovskite structure led to a change in the quantitative composition: the amount of butylene was much higher than that of ethylene on the samples containing manganese in the B-site. Activation of catalytic centers and their further stabilization taking place under the action of the reaction medium was established for all the systems studied. © 2019 Bulgarian Academy of Sciences, Union of Chemists in Bulgaria.

Авторы
Sharaeva A.A. 1 , Sheshko T.F. 1 , Kryuchkova T.A. 1 , Yafarova L.V. 2 , Zvereva I.А.2
Издательство
Bulgarian Academy of Sciences
Язык
Английский
Страницы
143-148
Статус
Опубликовано
Том
51
Год
2019
Организации
  • 1 Peoples’ Friendship University of Russia (RUDN University), Faculty of Science, Physical and Colloidal Chemistry Department, Miklukho-Maklaya str. 6, Moscow, 117198, Russian Federation
  • 2 Saint-Petersburg State University, Petrodvorets, Universitetsky pr. 26, Saint-Petersburg, 198504, Russian Federation
Ключевые слова
Carbon monoxide hydrogenation; Fischer-Tropsch synthesis; Light olefins; Perovskite catalysts
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