Eulerian multi-fluid simulation of biomass gasification in circulating fluidized beds: effects of equivalence ratio

Tarumanagara International Conference on the Applications of Technology and Engineering

工业技术（总论）

Wahyudi, H.^1 ; Rosyadi, I.^1 ; Pinem, M.P.^1

Mechanical Engineering Department, Faculty of Engineering Universitas Sultan Ageng Tirtayasa, Indonesia^1

关键词: Biomass Gasification;    Circulating fluidized bed;    Design and optimization;    Equivalence ratios;    Eulerian multi-fluid model;    Governing equations;    Multi-fluid simulations;    Syngas composition;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/508/1/012067/pdf
DOI  :  10.1088/1757-899X/508/1/012067

学科分类：工业工程学

来源: IOP

【 摘 要 】

In this work, a three-dimensional Eulerian multi-fluid model (MFM) is developed to study the effects of equivalence ratio on the biomass gasification in a full-loop circulating fluidized bed (CFB). In the model, all phases are treated as interpenetrating continuum media in which the governing equations of mass, momentum, and energy of Navier-Stokes formulations are solved. The standard k- turbulence model, and common chemical reactions in biomass gasification are incorporated into the model. Moreover, the inter-phase heat transfer exchanges are also considered. The results are compared to existing experimental data and the effects of equivalence ratio are analysed. It is demonstrated that the model has good capability to predict syngas compositions of CO, CO2, C2H4, and N2 under different equivalence ratio. From this, hydrodynamics and heat transfer inside this complex system are analyzed. The results can be useful for better design and optimization of biomass gasification in CFBs.