Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Continuous Supercritical Water Impregnation Method to Prepare Metal Oxide on Activated Carbon Composite Materials

Florentina Maxim
* ORCID logo ,
Elena-Ecaterina Toma
,
Giuseppe-Stefan Stoian
,
Cristian Contescu
,
Irina Atkinson
ORCID logo ,
Christian Ludwig
,
Speranta Tanasescu
Version 1 : Received: 17 January 2024 / Approved: 17 January 2024 / Online: 17 January 2024 (14:51:34 CET)

A peer-reviewed article of this Preprint also exists.

Maxim, F.; Toma, E.-E.; Stoian, G.-S.; Contescu, C.; Atkinson, I.; Ludwig, C.; Tanasescu, S. Continuous Supercritical Water Impregnation Method for the Preparation of Metal Oxide on Activated Carbon Composite Materials. Energies 2024, 17, 913. Maxim, F.; Toma, E.-E.; Stoian, G.-S.; Contescu, C.; Atkinson, I.; Ludwig, C.; Tanasescu, S. Continuous Supercritical Water Impregnation Method for the Preparation of Metal Oxide on Activated Carbon Composite Materials. Energies 2024, 17, 913.

Abstract

Nanomaterials based on metal oxides (MexOy) are employed as catalysts and/or sorbents in processes undergoing conditions in supercritical water (scH2O), the “green” reaction medium used to obtain energy relevant products. Their properties are greatly affected by the synthesis method used to produce the active MexOy. Moreover, in order to maintain their performance, it is more practical and cost-effective to use supported MexOy nanoparticles. Within this context, the present work deals with the preparation of carbon-supported ZnO and CuO composites by an innovative method based on impregnation under scH2O conditions. Metal oxides were impregnated on a carbon (C) support using a continuous flow tubular reactor. The results show that impregnation in scH2O is a promising approach for the preparation of ZnO/C and CuO/C composite materials. This one-step synthesis method, in a continuous flow, uses neither seed layer nor mineralizer, and it needs substantially lower preparation times than the conventional impregnation methods.

Keywords

supercritical water impregnation; continuous flow tubular reactor; supercritical hydrothermal synthesis; metal oxides catalysts; metal oxides sorbents; carbon-based materials

Subject

Chemistry and Materials Science, Materials Science and Technology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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