Abstract:
Direct hydrogen reduction (H-DR) is a promising technology for green ironmaking. Given the absence of commercial H-DR data, computational simulation is a powerful tool for engineering and overcoming the complexity of the system. This study develops a multiscale moving-bed reactor model to simulate non-catalytic gas-solid reactions and evaluate parameters at the pellet scale that hierarchically impact the performance at reactor scale. The reactor and solid particles are treated as coupled physical domains, enabling the computation of the solid transformations along both scales. Predictions for H-DR process highlight the substantial supply of H2 molar flow in enhancing reactor performance. A sensitivity multivariate analysis revealed the significant effect of pellet structural characteristics and gas inlet conditions on the process. Increased pellet porosity offers flexibility for process optimization, enabling the use of lower H2 percentages and temperatures. These findings provide valuable insights into optimizing H-DR process, improving energy efficiency, and better H2 utilization.
Referência:
METOLINA, Patricia; SILVA, André Luiz Nunis da; DIXON, Anthony G.; GUARDANI, Roberto. Multiscale modeling of non-catalutic gas solid reactions applied to the hysrogen direct reduction of iron in moving-bed reactor. International Journal of Hydrogen Energy, v.562, p.1214-1230, 2024.
Acesso ao artigo no site do Periódico:
https://www.sciencedirect.com/science/article/abs/pii/S0360319924009832
