Hybrid reduction of iron ores by biomass and H2: Reduction thermodynamics and kinetics

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-03-19 DOI:10.1016/j.powtec.2025.120953

Rongrong Wang , Alexander Babich , Dieter Senk , Min Wang

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Abstract

One of the key challenges of developing the carbon-neutral hydrogen direct reduction (H-DR) process is that: the direct reduced iron (DRI) product containing low/zero carbon, which is not favor on subsequent melting process. To cope with this problem, the present study proposed to use biomass products as an environment-friendly carbon source to prepare biomass embedded self-reducing pellets (SRP) and to further produce DRI. Reduction thermodynamics of the biomass and H₂ hybrid reduction was discussed to explore the reactions that can occur under the isothermal reduction conditions in the current study; Reduction kinetics was also analyzed to study the limiting steps of the hybrid reduction process; Microstructure analysis on the raw and reduced SRP revealed the change of pellet's porosity, iron containing phase and biomass phase during the reduction process. Aim of this study is to clarify the H₂ reduction mechanism of biomass embedded SRP, therefore to lay the theoretical foundation for the development of the CO₂-neutral H-DR process.

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.