Caracterização energética e química de biomassa lignocelulósica

Abstract

This study characterized energetically and chemically different lignocellulosic materials to evaluate their potential as biomass sources. Wood chips from Eucalyptus grandis x Eucalyptus urophylla (H-13) hybrids grown under different conditions, within an Integrated CropLivestock-Forestry (ILPF) system and in homogeneous planting, wood chips from native trees and cottonseed were studied. The results indicated that the lignin, holocellulose, extractives and ash contents varied according to the biomass source. Cottonseed presented extractives of (24.51%) and ash content (4.65%), values within the ranges reported in the literature. The biomass of native species presented high lignin content (33.82%) and high ash content (7.57%), possibly due to the presence of soil/sand. In the Eucalyptus grandis x Eucalyptus urophylla (H13) hybrids, the holocellulose values ranged from 58.71% to 68.07%, while the lignin contents ranged from 28.41% to 36.55%, showing variations due to the border effect in the ILPF system and differences in the management of homogeneous planting. The results highlighted the potential of these materials for energy use. The PCS ranged from 4392 kcal/kg (sawdust powder from native trees) to 4618 kcal/kg (Eucalyptus grandis x urophylla – northern line of ILPF), highlighting its potential for bioenergy, highlighting the influence of chemical characteristics on the quality of biomass for different applications.