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2022-09-01

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cc-by (c) Alarcón Avellán, Andreina et al., 2022
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/195952

Design of a Multi-Tubular Catalytic Reactor Assisted by CFD Based on Free-Convection Heat-Management for Decentralised Synthetic Methane Production

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https://doi.org/10.3390/catal12091053

Abstract

A simple reactor design for the conversion of CO2 methanation into synthetic methane based on free convection is an interesting option for small-scale, decentralised locations. In this work, we present a heat-management design of a multi-tubular reactor assisted by CFD (Ansys Fluent®) as an interesting tool for scaling-up laboratory reactor designs. The simulation results pointed out that the scale-up of an individual reactive channel (d = 1/4′, H = 300 mm) through a hexagonal-shaped distribution of 23 reactive channels separated by 40 mm allows to obtain a suitable decreasing temperature profile (T = 487-230 °C) for the reaction using natural convection cooling. The resulting heat-management configuration was composed of three zones: (i) preheating of the reactants up to 230 °C, followed by (ii) a free-convection zone (1 m/s air flow) in the first reactor section (0-25 mm) to limit overheating and, thus, catalyst deactivation, followed by (iii) an isolation zone in the main reactor section (25-300 mm) to guarantee a proper reactor temperature and favourable kinetics. The evaluation of the geometry, reactive channel separation, and a simple heat-management strategy by CFD indicated that the implementation of an intensive reactor cooling system could be omitted with natural air circulation.

Subject

Reactors químics, Diòxid de carboni, Metà

Subject (English)

Chemical reactors, Carbon dioxide, Methane

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Articles publicats en revistes (Ciència dels Materials i Química Física)

Citation

ALARCÓN AVELLÁN, Andreina, et al. Design of a Multi-Tubular Catalytic Reactor Assisted by CFD Based on Free-Convection Heat-Management for Decentralised Synthetic Methane Production. Catalysts. 2022. Vol. 12, num. 9, pags. 1-19. ISSN 2073-4344. [consulted: 12 of June of 2026]. Available at: https://hdl.handle.net/2445/195952

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