Influence of pretreatment for deashing of sugarcane bagasse on pyrolysis products

This paper reports the studies made on the vacuum pyrolysis of deashed sugarcane bagasse, on the pyrolysis products. The present work is with an objective to understand the change in the quantity and quality of the oil fraction obtained from pyrolysis, upon pretreatment for deashing of original biomass. Ash, in the entrained char is believed to be catalyzing the polymerization reaction in the oils and thereby increases the viscosity. Three different pre-treatment processes used for deashing are water leaching, mild acid treatment with HCl and mild acid treatment with HF.1 The study indicates the remarkable influence of pretreatment process for deashing, by enhancing the total energy distribution in oil fraction of the pyrolysis products. This is attributed to selective removal of ash elements along with removal of extractives and hemicellulose in different proportions. However, it was found that the pre-treatments do not improve the stability of oil. The water leachate, as expected, showed potential of making ethanol via fermentation.

[1]  J. Kennedy,et al.  Cellulose and wood: Chemistry and technology , 1991 .

[2]  F. Shafizadeh.  Pyrolysis and Combustion of Cellulosic Materials , 1968 .

[3]  C. Roy,et al.  Development of a Novel Vacuum Pyrolysis Reactor with Improved Heat Transfer Potential , 1997 .

[4]  Anuradda Ganesh,et al.  Adsorption characteristics and pore-development of biomass-pyrolysis char , 1998 .

[5]  Bryan M. Jenkins,et al.  On the properties of washed straw , 1996 .

[6]  Manuel Garcia-Perez,et al.  Vacuum pyrolysis of sugarcane bagasse , 2002 .

[7]  J. P. Diebold,et al.  A review of the chemical and physical mechanisms of the storage stability of fast pyrolysis bio-oils , 1999 .

[8]  M. Gray,et al.  Pyrolysis of a wood-derived material. Effects of moisture and ash content , 1985 .

[9]  A. V. Bridgewater,et al.  Biomass fast pyrolysis , 2004 .

[10]  A. Drummond,et al.  Pyrolysis of Sugar Cane Bagasse in a Wire-Mesh Reactor , 1996 .

[11]  Anthony V. Bridgwater,et al.  Fast pyrolysis of biomass : a handbook , 1999 .

[12]  Bryan M. Jenkins,et al.  Removal of inorganic elements to improve biomass combustion properties , 1995 .

[13]  L. Cortez,et al.  Potential for the use of pyrolytic tar from bagasse in industry , 1997 .

[14]  Evan Diamadopoulos,et al.  The effect of mineral matter and pyrolysis conditions on the gasification of Greek lignite by carbon dioxide , 1996 .

[15]  A. Chaala,et al.  Co-pyrolysis under vacuum of sugar cane bagasse and petroleum residue: Properties of the char and activated char products , 2001 .

[16]  N. Bakhshi,et al.  Characterization and stability analysis of wood-derived bio-oil , 1992 .

[17]  A. P. Terzyk,et al.  The effect of commercial carbon de‐ashing on its thermal stability and porosity , 1999 .

[18]  Stefan Czernik,et al.  Stability of wood fast pyrolysis oil , 1994 .

[19]  Anthony V. Bridgwater,et al.  Developments in thermochemical biomass conversion , 1997 .