TY - GEN
T1 - Renewable energy and amorphous silica obtained from rice husk combustion in a fluidized bed reactor
AU - Martínez, Juan Daniel
AU - Pineda, Tatiana
AU - Junkes, Janaina Accordi
AU - Hotza, Dachamir
PY - 2008
Y1 - 2008
N2 - The rice husk combustion in a bubbling and atmospheric fluidized bed reactor was investigated. The results showed the technical viability of producing both heat and amorphous silica from a renewable energy source. This paper presents the characterization of rice husk ash (RHA) obtained under varying fluidization velocities (0.13-0.15 m/s) and rice husk feed (4.5-7.2 kg/h). Characterization techniques include X-ray fluorescence, X-ray diffraction, particle size distribution and scanning electron microscopy. For the employed range of fluidization velocities of rice husk feed no noticeable influence on the chemical composition of produced RHA was observed. After combustion, RHA containing ∼93% amorphous silica and <3% unburned char was obtained. RHA primary particles presented sizes from 90 to 100 μm and a tendency for agglomeration in aqueous media. Thus, the potential of this type of reactors with respect to speed, continuity and self-sufficiency energy of the process was shown.
AB - The rice husk combustion in a bubbling and atmospheric fluidized bed reactor was investigated. The results showed the technical viability of producing both heat and amorphous silica from a renewable energy source. This paper presents the characterization of rice husk ash (RHA) obtained under varying fluidization velocities (0.13-0.15 m/s) and rice husk feed (4.5-7.2 kg/h). Characterization techniques include X-ray fluorescence, X-ray diffraction, particle size distribution and scanning electron microscopy. For the employed range of fluidization velocities of rice husk feed no noticeable influence on the chemical composition of produced RHA was observed. After combustion, RHA containing ∼93% amorphous silica and <3% unburned char was obtained. RHA primary particles presented sizes from 90 to 100 μm and a tendency for agglomeration in aqueous media. Thus, the potential of this type of reactors with respect to speed, continuity and self-sufficiency energy of the process was shown.
KW - Amorphous silica
KW - Fluidized bed
KW - Rice husk
UR - http://www.scopus.com/inward/record.url?scp=62449145373&partnerID=8YFLogxK
M3 - Ponencia publicada en las memorias del evento con ISBN
AN - SCOPUS:62449145373
SN - 9780873397261
T3 - Proceedings of the 2008 Global Symposium on Recycling, Waste Treatment and Clean Technology, REWAS 2008
SP - 1613
EP - 1622
BT - Proceedings of the 2008 Global Symposium on Recycling, Waste Treatment and Clean Technology, REWAS 2008
T2 - 2008 Global Symposium on Recycling, Waste Treatment and Clean Technology, REWAS 2008
Y2 - 12 October 2008 through 15 October 2008
ER -