Cai, et al (2024) Numerical simulation of the Co-combustion of coke and biocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More coupled with methane injection in iron ore sintering processes. International Journal of Hydrogen Energy. https://doi.org/10.1016/j.ijhydene.2024.08.035

The iron ore sintering process is a key energy-intensive stage in steel production, traditionally relying heavily on coke. However, this approach contributes significantly to greenhouse gas emissions. In pursuit of cleaner production methods, recent research has focused on partially replacing coke with biomassBiomass is a complex biological organic or non-organic solid product derived from living or recently living organism and available naturally. Various types of wastes such as animal manure, waste paper, sludge and many industrial wastes are also treated as biomass because like natural biomass these More fuels like biochar. Although biochar offers environmental benefits, its higher reactivity can negatively impact the sintering process, limiting its use.

A study published in the International Journal of Hydrogen Energy explores the potential of combining biochar with methane injection to optimize the sintering process. Using advanced numerical simulations, the researchers developed a model that considers various sub-processes, including biomass combustion, volatile release, and char oxidation.

The study found that injecting methane at concentrations up to 0.8% improved the thermal profile of the sintering bed, allowing for a higher proportion of biochar (up to 60%) without compromising the quality of the sinter. This approach achieved performance levels comparable to traditional all-coke methods, offering a feasible path toward reducing carbon emissions in steelmaking.

By refining the heat distribution within the sintering bed and leveraging methane injection, the study presents a promising method for integrating biochar into the iron ore sintering process. This could pave the way for more sustainable steel production, balancing industrial efficiency with environmental responsibility.