Enhancement of CO2 Removal Efficacy of Fluidized Bed Using Particle Mixing

The present study proposes a cost-effective assisted fluidization technique of particle mixing to improve the carbon capture effectiveness of a fluidized bed containing fine adsorbent powder. Using activated carbon as the adsorbent, we mixed external particle of Geldart group B classification in dif...

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Bibliographic Details
Published in:Applied sciences 2018-09, Vol.8 (9), p.1467
Main Authors: Al-Ghurabi, Ebrahim, Ajbar, Abdelhamid, Asif, Mohammad
Format: Article
Language:English
Subjects:
Acoustics
Activated carbon
Adsorbents
Adsorption
assisted fluidization
Carbon dioxide
Carbon dioxide removal
Carbon sources
CO2 removal
Contamination
Energy
Energy sources
Fluid mechanics
fluidized bed
Fluidized beds
Gases
Geldart group B
Membrane separation
Nanoparticles
particle mixing
Particle size distribution
Procurement
Size distribution
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Summary:The present study proposes a cost-effective assisted fluidization technique of particle mixing to improve the carbon capture effectiveness of a fluidized bed containing fine adsorbent powder. Using activated carbon as the adsorbent, we mixed external particle of Geldart group B classification in different fractions to examine the effectiveness of the proposed strategy of particle mixing. Four different particle-mixing cases were considered by varying the amount of added particle—0, 5, 10, and 30 wt %—on external particle-free basis. The inlet flow of the nitrogen was fixed, while two different flows of carbon dioxide were used. The adsorption experiment consisted of a three step procedure comprising purging using pure nitrogen, followed by adsorption with fixed inlet CO2 concentration, and finally the desorption step. Inlet flows of both nitrogen and CO2 were separately controlled using electronic mass flow controllers with the help of data acquisition system (DAQ). The CO2 breakthrough was carefully monitored using the CO2/O2 analyzer, whose analog output was recorded using the DAQ. Best results were obtained with 10% external particles. This is in conformity with the results of our previous study of bed hydrodynamics, which pointed to clear improvement in the fluidization behavior with particle mixing.
ISSN:2076-3417
2076-3417
DOI:10.3390/app8091467