Influence of storage time on the quality of biomass for energy production in humid subtropical regions

CERNE

Brito, José Otávio³  Brand, Martha Andreia²  Muñiz, Graciela Inês Bolzon de¹  Quirino, Waldir Ferreira⁴ 

[1] Universidade Federal do Paraná, Curitiba$$;Universidade do Estado de Santa Catarina, Lages$$;Universidade Federal de São Paulo, Piracicaba$$;IBAMA, Brasília$$

关键词: Energy properties;    Pinus taeda;    Eucalyptus dunnii;    storage time of forest biomass.;   

DOI  :  10.1590/S0104-77602010000400012

来源: Universidade Federal de Lavras-UFLA

【 摘 要 】

This work aims to determine an optimal storage time of forest biomass for use in energy production, through analysis of variations in physical and chemical properties of with bark timber over the storage period. The study was conducted in the municipality of Lages, SC, over a span of 18 months. The experiment used with bark logs of Pinus taeda and Eucalyptus dunnii, with varying diameters, and slabs of Pinus spp., stored in piles. The material was sampled freshly harvested (control), after two, after four and after six months of storage. Four lots were used, harvested and stored at the spring, summer, autumn and winter seasons. Properties being assessed included moisture content (wet basis), gross calorific value, net calorific value and ash content. Results demonstrated that storage time influenced moisture content and net calorific value, yet it had no influence on gross calorific value and ash content. Optimal storage time ranged from two to four months, depending on the species, form of biomass and storage season. The best behavior regarding quality after storage was from Pinus slabs, followed by Eucalyptus logs and Pinus logs, the latter showing the worst behavior.

【 授权许可】

Unknown