Rheology and fuel properties of slurries of char and bio-oil derived from slow pyrolysis of cassava pulp residue and palm shell

Chaiyot Tangsathitkulchai; Piyarat Weerachanchai; Malee Tangsathitkulchai

Korean Journal of Chemical Engineering, Vol.29, No.12, 1713-1721, December, 2012

DOI10.1007/s11814-012-0046-8 Export Citation

Rheology and fuel properties of slurries of char and bio-oil derived from slow pyrolysis of cassava pulp residue and palm shell

Chaiyot Tangsathitkulchai^†, Piyarat Weerachanchai, and Malee Tangsathitkulchai¹

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

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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.

Keywords:Bio-oil;Biomass;Char;Slurry Rheology;Pyrolysis

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[22] Shin YJ, Shen YH, Chemosphere., 68, 389 (2007)

[23] Lapcik L, Lapcikova B, Filgasova G, Colloid. Polym. Sci., 278, 65 (2000)

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