Eventos Anais de eventos
ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
DRY TORREFACTION OF EUCALYPTUS SPP. SAWDUST USING CO2 AND N2
Submission Author:
Claudinei Henrique Ferreira Rodrigues , SP
Co-Authors:
Claudinei Henrique Ferreira Rodrigues, Gretta Larisa Aurora Arce Ferrufino
Presenter: Claudinei Henrique Ferreira Rodrigues
doi://10.26678/ABCM.ENCIT2020.CIT20-0719
Abstract
The demand for world energy has increased considerably in recent years, about 85% of the world energy matrix is still from fossil fuels. The constant use of this type of fuel is very harmful to the environment, both for the extraction and for the emission of greenhouse gases. Biomass is nowadays the fourth most used energy source, Torrefaction is a process of pre-treatment of this biomass for energy generation, and it aims to reduce the problems of biomass in natura, such as high moisture content, irregular geometry, low calorific power and high levels of volatile materials and alkaline components. The torrefaction process still has many challenges, one of which is the best trail gas used to create an inert atmosphere during torrefaction. In Brazil, the production of forest and industrial residues from wood is large, and this is an excellent opportunity to add value to these by-products. The CO2 and N2 gases were useful to create an inert atmosphere inside the torrefaction reactor. The N2 was more effective in maintaining a higher mass yield for torrefaction, with a low level of calorific value. CO2 causes a greater loss of volatile materials and a higher content of oil and fixed carbon.
Keywords
dry torrefaction, Sawdust, Nitrogen, Carbon dioxide, energy
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