Conversion of Siam weeds and rice straws to energy products and valuable chemicals via pyrolysis Online publication date: Thu, 26-May-2016
by Joseph K. Ogunjobi; Labunmi Lajide; Bodunde J. Owolabi
International Journal of Environment and Waste Management (IJEWM), Vol. 17, No. 2, 2016
Abstract: Increasing global warming has necessitated reduction in combustion of waste and encouraged their conversion into useful materials. Rice straw and Siam weed were valorised via pyrolysis in a laboratory-scaled modified slow pyrolysis reactor and products collected and characterised. The major product obtained was bio-char for both wastes with 12.3% and 27.8% viscous bio-oil recovered from the pyrolytic condensates of rice straw and Siam weed respectively. The resulting bio-oil is less acidic compared to most known pyrolytic oils. Separation of condensates reduced acidity and retarded ageing of bio-oils. The most abundant compound found in Siam weed viscous bio-oil from GC-MS analysis was phenol (16.93%) while it was pentadecyl-2-propyl ester sulphurous acid (30.37%) in rice straw. Bio-chars from these residues showed a higher heating value of ∼21 MJ/kg and pH values of ∼9.00.
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