Obtaining and characterizing the bio-oil generated by rapid pyrolysis of the biomass duckweed (Spirodela sp.)
DOI:
https://doi.org/10.6008/CBPC2179-6858.2022.005.0013Keywords:
Floating macrophytes, Fast pyrolysis, Duckweed, floating macrophytes, fast pyrolysis, duckweed, biofuelAbstract
This work examined the use of the biomass generated from the floating macrophyte Spirodela sp., to obtain bio-oil through fast pyrolysis process in different parameters, seeking to find the best conditions of bio-oil yield in the process. This macrophyte presents rapid growth, and is efficiently used in nutrient and toxic metal removal processes, which generates a large volume of biomass. The parameters optimized in the fast pyrolysis process were condensation system, mass of biomass used, process time, nitrogen flow and reactor temperature. In the pyrolysis process where 3.0 g of biomass was used in a double condenser, at a temperature of 700 °C in a time equal to 10 minutes and a gas flow of 10 mL min-1, the best yield was obtained in the generation of bio-oil, 22.9 %±3.9%. After separation of the bio-oil obtained by sequential liquid-liquid extraction using the solvents hexane and dichloromethane, it was characterized by gas chromatography coupled to mass spectrometry (GC/MS) in order to define the profile of the bio-oil obtained. It was concluded that the floating macrophyte Spirodela sp. (duckweed) can be used as biomass for the conversion into bio-oil. The organic fractions of bio-oil present a complex mixture, rich in nitrogen compounds (62.5%), phenols (15.3%) and hydrocarbons (6.6%), with economic interest, which can be used as raw materials. raw materials for different industrial processes.
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