Estudo cinético da pirólise da biomassa casca de laranja

Abstract

Biomass pyrolysis presents itself as a great tool about waste treatment and generation of value-added products. Currently, oil dominates the energy matrix of all countries, in addition to being a non-renewable and very expensive resource. Thus, much has been studied about the pyrolysis of biomass from agro-industrial residues to produce bioenergy. Orange is a fruit with many nutrients and is widely consumed around the world, being one of the most processed fruits by the juice industry. Consequently, many by-products, such as its peel, rich in biomass, are generated and discarded. Therefore, this fruit appears as a strong candidate for the study of pyrolysis. Therefore, this research aimed at a kinetic study of the pyrolysis of orange peel biomass. First, the biomass was characterized to understand how its composition would influence pyrolysis. The contents of lignocellulosic compounds are close to the other by-products recorded in the literature. The research took place under a modified atmosphere of nitrogen gas, in the temperature range of 30 to 900 °C, using four heating rates: 5, 10, 15 and 20 °C/min. The kinetic parameters (activation energy and pre-exponential factor) were obtained by the isoconversional method of Flynn-Wall-Ozawa. Mathematical modeling was performed in Excel software. The results obtained were in the range of 52,35 to 350,47 kJ/mol for Flynn-Wall-Ozawa. The calorific value was 16.85 MJ/kcal, so orange-peel biomass is acceptable as an energy alternative.