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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

Taib, Mohd Rozainee and Ngo, S. P. and Salema, Arshad Adam and Tan, K. G. and Abu Hassan, Mohd. Ariffin and Noor, Zainura Zainon (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 (4). pp. 703-713. ISSN 0960-8524

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Official URL: http://dx.doi.org/10.1016/j.biortech.2007.01.049

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
Uncontrolled Keywords:ash, combustion, fluidising velocity, residual carbon, rice husk
Subjects:Q Science > QD Chemistry
S Agriculture > S Agriculture (General)
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:12551
Deposited By: Liza Porijo
Deposited On:08 Jun 2011 08:15
Last Modified:08 Jun 2011 08:15

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