Work

Modeling of radial heat transfer in cooled fixed-bed reactors by one- and two-dimensional models: Fischer-Tropsch synthesis as a case study

Year: 2025

Type: article

Abstract: New correlations for the overall heat transfer coefficient U th , designed for use in one-dimensional reactor models for wall-cooled tubular fixed-bed reactors, are presented. These correlations are applicable for estimating both critical conditions related to thermal runaway and reactor performance under safe operating conditions. They were derived by comparing a 1D and a 2D model, initially for Fischer-Tropsch synthesis (FTS) as a case study, and subsequently extended beyond this specific reaction system. Additionally, a novel approach is introduced for estimating critical runaway conditions without relying on a reactor model. This method is based solely on reaction kinetics, the effective thermal conductivity λ rad , and the heat transfer coefficient α wall , which accounts for heat transfer near the reactor wall.

Source: Chemical Engineering Science

DOI: 10.1016/j.ces.2025.121817

Authors: Christoph Kern, Andreas Jess

Institution: University of Bayreuth

Language: English

Topic: Heat and Mass Transfer in Porous Media

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $4,050