02147nab a2200301 4500 BR-BrBNA 20260504101949.0 260504b2019 bl.qr|pooa||| 00| 0 eng | BR-BrBNA eng P07 8905 Ramalho, Fernanda Maria Guedes Simetti, Rodrigo Arriel, Taiana Guimarães Loureiro, Breno Assis Hein, Paulo Ricardo Gherardi Influence of Particles Size on NIR Spectroscopic Estimations of Charcoal Properties Publicação on-line; 22 ref.; 1 table; 3 illus.; Summary (En) ABSTRACT The objective of this study was to evaluate the influence of particle size of charcoal samples on the predictive model statistics of charcoal chemical composition based on the NIR spectroscopy. Spectra of Acacia and of Eucalyptus charcoal were collected in the 100, 60 and 40 mesh granulometry, besides the powder remaining at the bottom of the sieves sets. They were subjected to principal component analysis and partial least square regression in order to estimate of volatile material (VMC), ash (AC) and fixed carbon content (FCC) values. The estimation of the FCC, VMC and AC of Eucalyptus based on NIR was more accurate using spectra of lower-particle-size powder. The models for Acacia charcoal were better using spectra measured at 40 mesh to predict FCC, 100 mesh for AC, and smaller size for VMC. NIR spectroscopy was efficient in estimating the immediate chemical composition of charcoal, except for AC. Keywords: wood pyrolysis, NIR, proximate chemical analysis, forest biomass. ANÁLISE QUÍMICA CARVÃO VEGETAL BIOMASSA FLORESTA MADEIRA 2929 347954 Rio de Janeiro-RJ Instituto de Florestas - UFRRJ 1994 2025-0453 Floresta e Ambiente (Brazil) 1415-0980 / ISSN 2179-8087 0nline v. 26(special number n.1) p. 1-8; (2019) BR2026001307 https://www.scielo.br/j/floram/a/jc9K4R5nghF9rrrJbkcH3kd/?format=pdf&lang=en ANA 341640 341640