CHEMICAL PROPERTIES OF PELLETS OF Pinus sp. TORREFIED IN A SCREW TYPE REACTOR | Zendy

Mateus Alves de Magalhães | Zendy; Angélica de Cássia Oliveira Carneiro | Zendy; Benedito Rocha Vital | Zendy; Carlos Miguel Simões da Silva | Zendy; Emylle Veloso Santos Costa | Zendy; Paulo Fernando Trugilho | Zendy

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CHEMICAL PROPERTIES OF PELLETS OF Pinus sp. TORREFIED IN A SCREW TYPE REACTOR

Author(s) -

Mateus Alves de Magalhães,

Angélica de Cássia Oliveira Carneiro,

Benedito Rocha Vital,

Carlos Miguel Simões da Silva,

Emylle Veloso Santos Costa,

Paulo Fernando Trugilho

Publication year - 2018

Publication title -

floresta

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.386

H-Index - 13

eISSN - 1982-4688

pISSN - 0015-3826

DOI - 10.5380/rf.v48i4.52766

Subject(s) - torrefaction , pellets , chemical composition , pulp and paper industry , lignin , moisture , materials science , biomass (ecology) , solid fuel , heat of combustion , carbon fibers , pelletizing , water content , pyrolysis , chemical engineering , chemistry , composite material , combustion , organic chemistry , agronomy , geotechnical engineering , composite number , engineering , biology

The combination of pelletization and torrefaction allows for obtaining pellets with higher energetic density. Thus, biomass becomes more attractive and usable for energetic purposes, and therefore, knowing the chemical properties becomes important to guarantee the quality of the torrefied pellets for fuel. The objective of this study was to evaluate the effect of torrefaction of Pinus sp. pellets on their chemical properties. The wood was previously transformed into particles and dried to 16% moisture content for further pelleting. For the torrefaction, the pellets were dried to 0% moisture content and subjected to heat treatment in a screw type reactor at the temperatures of 210, 250, and 290 °C and the times of 10, 20, and 30 minutes. In order to determine the chemical properties, the structural chemical composition, immediate chemical composition, elemental composition, and thermogravimetric analysis were performed. The torrefaction promoted significant changes in the chemical properties of Pinus sp. pellets, especially regarding the proportional increase of carbon content in detriment to oxygen reduction, increase of the thermal stability, and proportional increase of the lignin content by the reduction of the hemicelluloses. This improves the energetic quality of the biomass and turns it into a more competitive fuel when compared to fossil fuels.

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