Significance of the particle physical properties and the Geldart group in the use of correlations for the prediction of minimum fluidization velocity of biomass-sand binary mixtures

被引:8
作者
Caceres-Martinez, Louis Edwards [1 ]
Guio-Perez, Diana Carolina [1 ,2 ]
Rincon-Prat, Sonia Lucia [1 ]
机构
[1] Univ Nacl Colombia, Grp Invest Biomasa & Optimizac Term Proc BIOT, Dept Ingn Mecan & Mecatron, Fac Ingn, Carrera 30 45A-03 Edificio, Bogota 453, Colombia
[2] Chalmers Univ Technol, Dept Space Earth & Environm, Horsalsvagen 7B, S-41296 Gothenburg, Sweden
关键词
Gas-solid fluidization; Binary mixtures; Minimum fluidization velocity; Residual biomass; Pressure drop correlations; Geldart classification;
D O I
10.1007/s13399-020-01189-9
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The present study explores the relevance of the physical properties of biomass particles on the determination of the minimum fluidization velocity (U-mf) of binary mixtures. Fluidization experiments were performed in a cold flow unit with diverse biomasses mixed with sand in different mass fractions. Gas velocity and pressure drop across the bed were used to determine U-mf. Different correlations reported in the literature were evaluated on their ability to accurately predict U-mf of the mixtures. Results showed satisfactory predictions when appropriately identifying correlations according to the corresponding Geldart groups for the biomass particles. This perspective opens new possibilities toward the generalization of correlation factors and helps in improving the accuracy of the prediction for highly heterogeneous mixtures. The methodology also allows the analysis of mixtures for which the experimental approach is difficult, such as those including char particle, with the only requirement of carefully measuring the physical properties of the particles.
引用
收藏
页码:935 / 951
页数:17
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