Work

Computational simulation of SE-SR of methane in a bench-scale circulating fluidised bed reactor: Insights into the effects of bed geometry design and catalyst-sorbent ratios

Year: 2024

Type: article

Abstract: Operating sorbent-enhanced steam reforming (SE-SR) of methane in fluidised bed reactors presents a promising pathway for industrial low-carbon hydrogen production. However, further understanding of complex multi-phase behaviours under certain operating conditions is still needed to guide reactor design and scale-up. This study develops CPFD reactor models to analyse the impact of catalyst and sorbent ratios on cyclic SE-SR performance. These simulations introduce operational complexities by modelling reduced catalyst activity and sorbent inventory scenarios to gain insights for continuous run times. The impacts of two bed geometry designs are also examined.Results indicate that varying solids ratios influenced reaction progress, with optimised methane conversion and CO2 capture observed at moderate ratios. Higher sorbent loadings enhanced thermal neutrality but risked increased calciner energy penalties. Bed geometry also influenced localised hydrodynamics. Detailed solids and gas concentration contours provide insight into transient mixing and spatial product distribution in the two designs. Comparison of pressure profiles clarifies effects on heat distribution and mass transfer driving forces.

Source: Fuel

DOI: 10.1016/j.fuel.2024.132817

Authors: Chinonyelum Udemu, Carolina Font-Palma

Institution: University of Hull

Language: English

Topic: Chemical Looping and Thermochemical Processes

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Industry, innovation and infrastructure

Open Access status: hybrid

Estimated APC paid: $4,200