Abstract
Under the renewable energy context, sugarcane biomass pyrolysis has been growing as a convenient route to produce bio-oil, which can be set into the chemical industry and refineries as building blocks or combustion fuel. In this work sugarcane straw was submitted to direct pyrolysis in a fluidized bed pilot plant at 500°C, in presence of air. Sugarcane in natura was also pyrolysed as a model for comparison, in order to determine the viability of processing different sources of raw biomass. The physicochemical characterization of the biomass precursors as well as of the bio-oils was also carried out, which points both biomass feedstocks as suitable for bio-oil production in terms of viscosity, surface tension, density and acidity. The bio-oil obtained from sugarcane in natura presented higher carbon and hydrogen content as well as lower oxygen content. On the other hand, the metal content is higher in the bio-oil obtained from sugarcane straw, in special the iron and potassium contents were 807 ppm and 123 ppm against 27 ppm and 1 ppm in the bio-oil from sugarcane in natura. Aliphatic and aromatic compounds as well as carbohydrates scaffolds were identified as the main components of the bio-oil. GC-MS analyses showed aromatic products from lignine fragmentation and free sugars and sugar derivatives.
Highlights
The reduction of the use of fossil fuels has been proposed and encouraged in order to minimize the greenhouse gases and particulate emissions, pointed out by some authors as one of the causes for the global warming [1]
Under the renewable energy context, sugarcane biomass pyrolysis has been growing as a convenient route to produce bio-oil, which can be set into the chemical industry and refineries as building blocks or combustion fuel
The metal content is higher in the bio-oil obtained from sugarcane straw, in special the iron and potassium contents were 807 ppm and 123 ppm against 27 ppm and 1 ppm in the bio-oil from sugarcane in natura
Summary
The reduction of the use of fossil fuels has been proposed and encouraged in order to minimize the greenhouse gases and particulate emissions, pointed out by some authors as one of the causes for the global warming [1]. Under this context, biomass has emerged as a renewable source of energy, contributing to a clean and sustainable fuel economy [2]. Besides the use of biomass as a second generation fuel feedstock, it can be considered as a primary source of renewable energy, which can progressively enhance the CO2 mitigation
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