Characterization of the bubbling fluidization of nanoparticles
Source abstract
Abstract
Abstract The dynamic features of an agglomerate bubbling fluidization of nanoparticles were investigated through the analysis of pressure fluctuations. Experiments were carried out in a lab-scale fluidized bed at ambient conditions using 10–15 nm silica nanoparticles without any surface modification. Pressure fluctuation signals were processed in both frequency and time-frequency domains to characterize the behavior of various scales of phenomena (i.e., macro-, meso-, and micro-structures) during fluidization. Due to the aggregation of nanoparticles, three separate broad peaks were observed in the frequency spectra of the pressure signals measured in the bubbling fluidized bed of nanoparticles. A non-intrusive method based on the decoupling of pressure fluctuations recorded simultaneously in the plenum and in the bed was used to determine the approximate size of the bubbles in the bed.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Granular flow and fluidized beds · Particle Dynamics in Fluid Flows · Fluid Dynamics and Mixing
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (35)
Show source-provided references
1. A novel approach for simultaneous hydrodynamic characterization of gas–liquid and gas–solid systems10.1016/j.ces.2012.12.031 ↗
2. Non-intrusive monitoring of bubbles in a gas–solid fluidized bed using vibration signature analysis10.1016/j.powtec.2009.08.012 ↗
3. A study of pressure fluctuations in a bubbling fluidized bed10.1016/0032-5910(66)80003-7 ↗
4. Resolving dynamical features of fluidized beds from pressure fluctuations10.1016/S0032-5910(00)00419-8 ↗
5. Effect of interparticle forces on the hydrodynamic behaviour of fluidized aerogels10.1016/0032-5910(85)87003-0 ↗
6. Entropy-based algorithms for best basis selection10.1109/18.119732 ↗
7. Bubble growth due to coalescence in fluidised beds
8. Nano particle fluidisation in model 2-D and 3-D beds using high speed X-ray imaging and microtomography10.1007/s11051-006-9169-3 ↗
9. Fluidization characteristics of SiO2 nanoparticles in an acoustic fluidized10.1002/ceat.200500263 ↗
10. Aggregation behavior of nanoparticles in fluidized beds10.1016/j.powtec.2005.08.019 ↗
11. On the nature of aggregative and particulate fluidization
12. Characterization of fluidization regimes by time-series analysis of pressure fluctuations10.1016/S0301-9322(99)00028-2 ↗
13. Fluidization of nano-size particles10.1023/A:1022807918247 ↗
14. Effect of electric field on the hydrodynamics of fluidized nanoparticles10.1016/j.powtec.2008.01.010 ↗
15. Characterization of regimes and regime transitions in bubble columns by chaos analysis of pressure signals10.1016/S0009-2509(97)00290-X ↗
16. Sound-assisted fluidization of SiO2 nanoparticles with different surface properties10.1021/ie0608859 ↗
17. Aerated vibrofluidization of silica nanoparticles10.1002/aic.10237 ↗
18. Quevedo · 2004
19. In situ measurements of gas fluidized nanoagglomerates10.1021/ie9015446 ↗
20. Fluidization of nanoagglomerates in a rotating fluidized bed10.1002/aic.10826 ↗
21. Rao · 2010
22. Interparticle forces in fluidisation: A review10.1016/S0032-5910(00)00309-0 ↗
23. Stoica · 2005
24. The role of the hydrogen bond in dense nanoparticle-gas suspensions10.1039/c3cp43687j ↗
25. Fluidization, bubbling and jamming of nanoparticle agglomerates10.1016/j.ces.2007.08.050 ↗
26. Fluidization of nanoparticles: A simple equation for estimating the size of agglomerates10.1016/j.cej.2007.09.032 ↗
27. Fluidization of fine and ultrafine particles using nitrogen and neon as fluidizing gases10.1002/aic.11329 ↗
28. Non-intrusive determination of bubble and slug length scales in fluidized beds by decomposition of the power spectral density of pressure time series10.1016/S0301-9322(01)00090-8 ↗
29. Origin, propagation and attenuation of pressure waves in gas–solid fluidized beds10.1016/S0032-5910(97)03341-X ↗
30. Fluidization of nanopowders: Experiments, modeling, and applications
31. Time-series analysis of pressure fluctuations in gas–solid fluidized beds – A review10.1016/j.ijmultiphaseflow.2010.12.007 ↗
32. Fluidization and agglomerate structure of SiO2 nanoparticles10.1016/S0032-5910(01)00491-0 ↗
33. The use of the fast Fourier transform for estimation of power spectra: A method based on time averaging over short, modified periodograms10.1109/TAU.1967.1161901 ↗
34. Sound assisted fluidization of nanoparticle agglomerates10.1016/j.powtec.2004.01.023 ↗
35. Gas fluidization characteristics of nanoparticle agglomerates10.1002/aic.10319 ↗