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Received August 31, 2011
Accepted March 28, 2012
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Rheology and fuel properties of slurries of char and bio-oil derived from slow pyrolysis of cassava pulp residue and palm shell
School of Chemical Engineering, Suranaree University of Technology, Muang District, Nakhon Ratchasima 30000, Thailand 1School of Chemistry, Suranaree University of Technology, Muang District, Nakhon Ratchasima 30000, Thailand
Korean Journal of Chemical Engineering, December 2012, 29(12), 1713-1721(9), 10.1007/s11814-012-0046-8
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Abstract
Three bio-oil samples, namely, raw bio-oil from pyrolysis of cassava pulp residue (CPR), separated oil phase and aqueous phase of bio-oil from pyrolysis of palm shell (PS), were used as suspending media for preparing slurries of bio-oil and the co-product char. Rheologies of all tested slurries exhibited pseudoplasticity with yield stress and the degree of this non-Newtonian behavior depended on such parameters as slurry type, solid concentration, particle size and slurry temperature. Overall, char/bio-oil slurries gave better fuel properties including higher pH and reasonably high calorific value (18-32 MJ/kg) as compared to their bio-oil properties. Combustion of char/bio-oil slurries occurred in the temperature range similar to their solid char combustion and without ignition delay.
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Cheng J, Zhou JH, Li YC, Liu JZ, Cen KF, Fuel, 87(12), 2620 (2008)
He MZ, Wang YM, Forssberg E, Powder Technol., 147(1-3), 94 (2004)
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Tangsathitkulchai C, Austin LG, Powder Technol., 56, 293 (1988)
Shin YJ, Shen YH, Chemosphere., 68, 389 (2007)
Lapcik L, Lapcikova B, Filgasova G, Colloid. Polym. Sci., 278, 65 (2000)
Mosa ES, Saleh AM, Taha TA, El-Molla AM, Physicochem. Probl. Mi., 42, 107 (2008)
Olhero SM, Ferreira JMF, Powder Technol., 139(1), 69 (2004)
Aktas Z, Woodburn ET, Fuel Process. Technol., 62(1), 1 (2000)
He MZ, Wang YM, Forssberg E, Int. J. Miner. Process., 78(2), 63 (2006)
