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Study of gas-fluidization dynamics with laser-polarized 129Xe
- Source :
- Magnetic Resonance Imaging. 23:203-207
- Publication Year :
- 2005
- Publisher :
- Elsevier BV, 2005.
-
Abstract
- We report initial NMR studies of gas dynamics in a particle bed fluidized by laser-polarized xenon (129Xe) gas. We have made preliminary measurements of two important characteristics: gas exchange between the bubble and emulsion phases and the gas velocity distribution in the bed. We used T2* contrast to differentiate the bubble and emulsion phases by choosing solid particles with large magnetic susceptibility. Experimental tests demonstrated that this method was successful in eliminating 129Xe magnetization in the emulsion phase, which enabled us to observe the time dependence of the bubble magnetization. By employing the pulsed field gradient method, we also measured the gas velocity distribution within the bed. These results clearly show the onset of bubbling and can be used to deduce information about gas and particle motion in the fluidized bed.
- Subjects :
- Magnetic Resonance Spectroscopy
Chemistry
Lasers
Bubble
Biomedical Engineering
Biophysics
Analytical chemistry
chemistry.chemical_element
Mechanics
Xenon
Fluidized bed
Phase (matter)
Xenon Isotopes
Particle
Emulsions
Radiology, Nuclear Medicine and imaging
Gases
Fluidization
Volatilization
Pulsed field gradient
Magnetosphere particle motion
Subjects
Details
- ISSN :
- 0730725X
- Volume :
- 23
- Database :
- OpenAIRE
- Journal :
- Magnetic Resonance Imaging
- Accession number :
- edsair.doi.dedup.....b4e10663791ff8ea6a360fbb5a931642