Effect of reactions in small eddies on biomass gasification with eddy dissipation concept - Sub-grid scale reaction model

Juhui Chen; Weijie Yin; Shuai Wang; Cheng Meng; Jiuru Li; Bai Qin; Guangbin Yu

doi:10.1016/j.biortech.2016.02.139

Effect of reactions in small eddies on biomass gasification with eddy dissipation concept - Sub-grid scale reaction model

Bioresour Technol. 2016 Jul:211:93-100. doi: 10.1016/j.biortech.2016.02.139. Epub 2016 Mar 8.

Authors

Juhui Chen¹, Weijie Yin², Shuai Wang³, Cheng Meng², Jiuru Li², Bai Qin², Guangbin Yu²

Affiliations

¹ School of Mechanical Engineering, Harbin University of Science and Technology, Harbin 150080, China. Electronic address: chenjuhui@hit.edu.cn.
² School of Mechanical Engineering, Harbin University of Science and Technology, Harbin 150080, China.
³ School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.

PMID: 27010338
DOI: 10.1016/j.biortech.2016.02.139

Abstract

Large-eddy simulation (LES) approach is used for gas turbulence, and eddy dissipation concept (EDC)-sub-grid scale (SGS) reaction model is employed for reactions in small eddies. The simulated gas molar fractions are in better agreement with experimental data with EDC-SGS reaction model. The effect of reactions in small eddies on biomass gasification is emphatically analyzed with EDC-SGS reaction model. The distributions of the SGS reaction rates which represent the reactions in small eddies with particles concentration and temperature are analyzed. The distributions of SGS reaction rates have the similar trend with those of total reactions rates and the values account for about 15% of the total reactions rates. The heterogeneous reaction rates with EDC-SGS reaction model are also improved during the biomass gasification process in bubbling fluidized bed.

Keywords: Biomass gasification; Bubbling fluidized bed; EDC-SGS reaction model; Large-eddy simulation; SGS reaction rates.

MeSH terms

Bioreactors
Catalysis
Fermentation
Gases / metabolism*
Models, Theoretical*
Temperature

Substances

Gases