Akademik Veri Yönetim Sistemi
Sustainability (Switzerland), cilt.17, sa.20, 2025 (SCI-Expanded)
Biomass pellets are widely used for combustion but can also serve as sustainable feedstocks for pyrolysis. This study examined wood (WP), palm-pruning (PP), reed (RD), and daphne (DP) pellets. We present a compact framework linking composition (proximate/ultimate and lignocellulosic fractions) with TG/DTG, FTIR, TGA-derived indices (CPI, Ddev, Rw), Tpmax and Rav to predict product selectivity and temperature ranges. TG/DTG showed the following sequence: hemicellulose (≈200–315 °C) first, cellulose (≈315–400 °C) with a sharp maximum, and lignin ≈200–600 °C. Low-ash WP and DP had sharper, higher peaks, favoring concentrated devolatilization and condensables. Mineral-rich PP and RD began earlier and showed depressed peaks from AAEM catalysis, shifting toward gases and ash-richer chars. Composition shaped these patterns: higher cellulose increased Rav and CPI; links to Tpmax were moderated by ash. Lignin strengthened a high-T shoulder, while hemicellulose promoted early deacetylation (RD’s 1730 cm−1 acetyl C=O) and release of CO2 and acids. Correlations (|r| ≥ 0.70) supported these links: VM with total (m∞) and second stage mass loss; cellulose with Rav and CPI (Tpmax moderated by ash); lignin and O/C with Tf and last stage mass loss; ash negatively with Ti, Tpmax, and m∞. The obtained results guide the sustainable valorization of biomass pellets by selecting temperatures for liquids, H2/CO-rich gases or low-ash aromatic chars.