A new enabling multiscale model for low-carbon cement pre-calciners fueled by biomass

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:Provides a validated multiscale model for reactive multiphase flow with agglomeration and intraparticle effects, advancing cement decarbonization simulation.

🏢実務担当者:Offers a tool for optimizing biomass-fueled pre-calciner operations, improving combustion efficiency and reducing emissions in cement plants.

🏛政策担当者:Supports policy on biomass utilization in heavy industry by demonstrating technical feasibility and performance improvements.

Although large biomass fuels offer significant potential for deep decarbonization, their use in cement pre-calciners often results in incomplete burnout. Raw meal agglomeration adds further complexity, and together these effects cause reactor instability and inefficiency, as well as downstream operational issues. For the first time, this paper presents an enabling numerical model to address these challenges. For this purpose, a Multi-Fluid Model (MFM) is initially developed to effectively capture the multiphase reactive flows and agglomeration effects in industrial pre-calciners. The model integrates a particle-scale agglomeration mechanism and incorporates the agglomerate sizes into constitutive relations—including granular energy, solid viscosity, drag force, heat and mass transfer, and reactive surface area. Validation against industrial data confirms the model's markedly improved predictive accuracy compared with previous models, and its applicability is further examined under different tertiary air conditions. Based on this, a Sub-Particle-Scale (SPS) model is incorporated to account for intraparticle temperature gradient effects within large biomass particles in industrial systems. After validation using industrial measurements, the integrated model is applied to reveal biomass size effects on incomplete burnout and pre-calciner performance. These new efforts account for fine particle agglomeration and intraparticle temperature gradients in large particles while maintaining suitable computational efficiency, thereby enabling effective industrial-scale simulations. It provides a tool for guiding the operation of biomass-fueled pre-calciners under various conditions, supporting the advancement of low-carbon cement production. • A model is proposed to simulate agglomerate effects in cement pre-calciners. • The model represents a significant improvement over existing modelling approaches. • It is further developed and validated to enable capturing intraparticle effects in large biomass. • These developments lead to a reliable integrated model not previously reported. • This model is used to reveal biomass size effects under industrial conditions.

• openalex https://doi.org/10.1016/j.energy.2026.141357first seen 2026-05-17 05:48:04