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© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

A series of mono- and bi-metallic copper and iron samples were prepared by impregnation method on micro-spherical silica and used for the synthesis of methanol via CO2 hydrogenation. Compared with conventional carrier oxides, micro-spherical silica has obvious advantages in terms of absorption capacity and optimal distribution of active phases on its surface, also exhibiting excellent heat resistance properties and chemical stability. The prepared catalysts were characterized by various techniques including XRF, XRD, SEM, TEM, H2-TPR and CO2-TPD techniques, while catalytic measurements in CO2 hydrogenation reaction to methanol were performed in a fixed bed reactor at a reaction pressure of 30 bar and temperature ranging from 200 to 260 °C. The obtained results revealed that the mutual interaction of copper–iron induces promotional effects on the formation of methanol, especially on systems where Fe enrichment on the silica support favours the presence of a larger concentration of oxygen vacancies, consequently responsible for higher CO2 adsorption and selective methanol production. Surface reconstruction phenomena rather than coke or metal sintering were responsible for the slight loss of activity recorded on the catalyst samples during the initial phase of reaction; however, with no appreciable change on the product selectivity.

Details

Title
Copper and Iron Cooperation on Micro-Spherical Silica during Methanol Synthesis via CO2 Hydrogenation
Author
Todaro, Serena 1 ; Frusteri, Francesco 1 ; Wawrzyńczak, Dariusz 2 ; Majchrzak-Kucęba, Izabela 2 ; Pérez-Robles, Juan-Francisco 3 ; Cannilla, Catia 1   VIAFID ORCID Logo  ; Bonura, Giuseppe 1   VIAFID ORCID Logo 

 CNR-ITAE, Istituto di Tecnologie Avanzate per l’Energia “Nicola Giordano”, Via S. Lucia Sopra Contesse, 5, 98126 Messina, Italy; [email protected] (S.T.); [email protected] (F.F.); [email protected] (C.C.) 
 Department of Advanced Energy Technologies, Częstochowa University of Technology, Dąbrowskiego 73 St., 42-201 Częstochowa, Poland; [email protected] (D.W.); [email protected] (I.M.-K.) 
 Cinvestav Libramiento, Laboratorio de Materiales Nanoestructurados y Caracterización Electroquímica, Norponiente, #2000, Fracc. Real de Juriquilla, Santiago de Querétaro 76230, Mexico; [email protected] 
First page
603
Publication year
2022
Publication date
2022
Publisher
MDPI AG
e-ISSN
20734344
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2679686768
Copyright
© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.