Effect of preparative variables on VOx supported onto pillared and honeycomb montmorillonite for total acetone oxidation

Dublin Core

Title

Effect of preparative variables on VOx supported onto pillared and honeycomb montmorillonite for total acetone oxidation

Subject

VANADIO
OXIDO DE VANADIO
ARCILLA
MONOLITO
COMPUESTOS ORGANICOS VOLATILES
VOCs
MONTMORILLONITA
BIBLIOGRAFIA NACIONAL QUIMICA
2026

Abstract

VOx catalysts have been widely applied in heterogeneous catalysis for decades. Their reactivity in various reactions increases when supported on a suitable solid. Montmorillonites have a great versatility to achieve improved catalytic supports, particularly pillared clays (PILCs) and honeycomb monoliths. This work aims to determine whether the type of support (powder or monolith) prepared from a clay influences the properties of VOx as active phase and which preparative variables (loading or way of incorporation) lead to a higher activity in total acetone oxidation. The catalysts were characterised by μXRF, TGA, XRD, SEM-EDS, TPR and N2-physisorption. It was possible to prepare VOx catalysts on both powdered PILC and monolithic supports. In the case of the catalysts based on PILC, an active phase loading of 20 wt% was found to be the most favourable to achieve 90 % of total acetone oxidation at 300 ºC. For all the catalysts prepared from VOx supported on PILC, mainly V5+ was found in the active phase. In the case of the monolith-supported catalysts, the loading incorporated after two impregnation cycles was lower than 1 wt%. An acetone conversion of 90 % was achieved at 350 ◦C. Performing two impregnation cycles with an intermediate calcination process favoured the formation of V5+ species and their accumulation but did not improve the reactivity towards acetone oxidation. Therefore, the nature of different supports, even if they proceed from the same montmorillonite, and the preparative variables may influence the type of VOx phase formed and its catalytic activity.

Creator

Vidal, Hilario
Gatica, José Manuel
Yeste, María del Pilar

Source

Catalysis Todayv. 463, 2026. -- e115619

Publisher

Elsevier

Date

2026

Rights

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Format

PDF

Extent

12 p.

Language

Inglés

Type

Artículo

Identifier

10.1016/j.cattod.2025.115619

Document Item Type Metadata

Original Format

PDF
Date Added
October 2, 2026
Collection
Bibliografía Nacional Química
Item Type
Document
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Citation
De los Santos, Carolina et al., “Effect of preparative variables on VOx supported onto pillared and honeycomb montmorillonite for total acetone oxidation,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed October 7, 2026, https://riquim.fq.edu.uy/items/show/7132.