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Effect of fluidising velocity on the combustion of rice husk in a bench-scale fluidised bed combustor for the production of amorphous rice husk ash

Rozainee, M and Ngo, S. P. and Salema, A. A. and Tan, K. G. and Ariffin, M and Zainura, Z. N. (2008) Effect of fluidising velocity on the combustion of rice husk in a bench-scale fluidised bed combustor for the production of amorphous rice husk ash. Bioresource Technology , 99 . pp. 703-713.

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Abstract

This study was focused on investigating the optimum fluidising velocity during the combustion of rice husk in a bench-scale fluidised bed combustor (ID 210 mm) to obtain low carbon ash in the amorphous form. When all other parameters are held constant, the optimum fluidizing velocity aids in almost complete combustion, thereby releasing the entrapped carbon for further conversion. This results in ash with consistently low carbon content (less than 2 wt%). The range of fluidising velocities investigated was from as low as 1.5 Umf to as high as 8 Umf. It was found that the optimum fluidising velocity was approximately 3.3 Umf as the mixing of rice husk with the bed was good with a high degree of penetration into the sand bed. The resulting ash retained its amorphous form with low residual carbon content (at 2.88 wt%) and minimal sand contamination as shown by the X-ray diffraction analysis.

Item Type:Article
Subjects:Technology > Manufacturing processes for nanotechnology
ID Code:4603
Deposited By:CSMNT
Deposited On:08 Apr 2009 08:21
Last Modified:08 Apr 2009 08:21

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