Experimental study and discrete element method simulation of Geldart Group A particles in a small-scale fluidized bed

Journal Article · Tue Sep 19 00:00:00 EDT 2017 · Advanced Powder Technology

DOI:https://doi.org/10.1016/j.apt.2017.09.003· OSTI ID:1439972

Li, Tingwen ^[1]; Rabha, Swapna ^[2]; Verma, Vikrant ^[2]; Dietiker, Jean -Francois ^[3]; Xu, Yupeng ^[2]; Lu, Liqiang ^[2]; Rogers, William ^[2]; Gopalan, Balaji ^[3]; Breault, Greggory ^[4]; Tucker, Jonathan ^[5]; Panday, Rupen ^[4]

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1. National Energy Technology Lab. (NETL), Morgantown, WV (United States); AECOM, Morgantown, WV (United States)
2. National Energy Technology Lab. (NETL), Morgantown, WV (United States)
3. National Energy Technology Lab. (NETL), Morgantown, WV (United States); West Virginia Univ. Research Corp., Morgantown, WV (United States)
4. National Energy Technology Lab. (NETL), Morgantown, WV (United States); REM Engineering Services, Morgantown, WV (United States)
5. National Energy Technology Lab. (NETL), Morgantown, WV (United States); West Virginia Univ., Morgantown, WV (United States)

Geldart Group A particles are of great importance in various chemical processes because of advantages such as ease of fluidization, large surface area, and many other unique properties. It is very challenging to model the fluidization behavior of such particles as widely reported in the literature. In this study, a pseudo-2D experimental column with a width of 5 cm, a height of 45 cm, and a depth of 0.32 cm was developed for detailed measurements of fluidized bed hydrodynamics of fine particles to facilitate the validation of computational fluid dynamic (CFD) modeling. The hydrodynamics of sieved FCC particles (Sauter mean diameter of 148 µm and density of 1300 kg/m3) and NETL-32D sorbents (Sauter mean diameter of 100 µm and density of 480 kg/m3) were investigated mainly through the visualization by a high-speed camera. Numerical simulations were then conducted by using NETL’s open source code MFIX-DEM. Both qualitative and quantitative information including bed expansion, bubble characteristics, and solid movement were compared between the numerical simulations and the experimental measurement. Furthermore, the cohesive van der Waals force was incorporated in the MFIX-DEM simulations and its influences on the flow hydrodynamics were studied.

• Research Organization: National Energy Technology Lab. (NETL), Morgantown, WV (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: FE0004000
• OSTI ID: 1439972
• Alternate ID(s): OSTI ID: 1495824
• Journal Information: Advanced Powder Technology, Vol. 28, Issue 11; ISSN 0921-8831
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
Discrete element method
Fluidized bed
Group A particles
Bed expansion
Cohesive force
High-speed image