Continuous Supercritical Water Impregnation Method for the Preparation of Metal Oxide on Activated Carbon Composite Materials

Florentina Maxim (), Elena-Ecaterina Toma, Giuseppe-Stefan Stoian, Cristian Contescu, Irina Atkinson, Christian Ludwig and Speranta Tanasescu
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Florentina Maxim: “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, Romania
Elena-Ecaterina Toma: “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, Romania
Giuseppe-Stefan Stoian: “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, Romania
Cristian Contescu: Oak Ridge National Laboratory, One Bethel Valley Road, Oak Ridge, TN 37831, USA
Irina Atkinson: “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, Romania
Christian Ludwig: Paul Scherrer Institute (PSI), ENE LEP CPM, 5232 Villigen PSI, Switzerland
Speranta Tanasescu: “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, Romania

Energies, 2024, vol. 17, issue 4, 1-14

Abstract: Metal oxide (Me x O y ) nanomaterials are used as catalysts and/or sorbents in processes taking place in supercritical water (scH 2 O), which is the “green” solvent needed to obtain energy-relevant products. Their properties are significantly influenced by the synthesis method used to prepare active Me x O y . In addition, the use of supported Me x O y nanoparticles is more practical and cost-effective in terms of their performance maintenance. Within this context, the present study reports on the preparation of carbon-supported ZnO and CuO composites using an innovative scH 2 O impregnation method. Metal oxides were impregnated on a carbon (C) support using a continuous-flow tubular reactor. The results show that impregnation in scH 2 O 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 a seed layer nor a mineralizer, and it needs substantially lower preparation times than conventional impregnation methods.

Keywords: supercritical water impregnation; continuous-flow tubular reactor; supercritical hydrothermal synthesis; metal oxide catalysts; metal oxide sorbents; carbon-based materials (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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