136003 20260218073532.0 doi 10.1021/acs.energyfuels.4c00937 sideral 138980 ART-2024-138980 eng Maziarka, Przemyslaw Part 1-Impact of Pyrolysis Temperature and Wood Particle Length on Vapor Cracking and Char Porous Texture in Relation to the Tailoring of Char Properties 2024 Access copy available to the general public Unrestricted Pore size distribution is a key parameter in the performance of biobased pyrolytic char in novel applications. In industrial-scale production, the size of feedstock particles typically exceeds a few millimeters. For such particle sizes, it is a challenge to tailor the final properties of the char based only on the process conditions (experimental and modeling-wise). Pyrolysis studies of single particles larger than a few millimeters provide data sets useful for modeling and optimization of the process. Part 1 of this research focused on the pyrolysis of single particles of beech wood, secondary cracking, and its effect on the char porous texture. It contains a quantitative assessment of the effects of five conversion temperatures (from 300 to 840 °C) and two particle dimensions (Ø8 × 10 mm and Ø8 × 16 mm) on the composition of the pyrolysis vapors and pore morphology of the char. Results from real-time temperature and mass changes are presented along with release profiles of 15 vapor constituents measured by infrared spectroscopy. Furthermore, characterization of the collected bio-oil (using GC-MS/FID) and the textural hierarchical structured char (through N2 and CO2 adsorption, Hg porosimetry, and scanning electron microscopy (SEM)) was performed. Cracking of vapors above 500 °C was compound-specific. The polyaromatic hydrocarbons (PAHs) yield, between 680 and 840 °C, increased 5 times for 10 mm particles and 9 times for 16 mm ones. Besides temperature, PAH yield was suspected to correlate with particle length and PAHs/soot deposition in the micropores. Results showed that the macropores accounted for over 80% of the total pore volume, regardless of the temperature and particle length. Increasing the particle length by 60% caused a reduction in the specific surface area (ca. 15% at 840 °C) of the resulting char, mainly due to a reduction in microporosity. Based on the findings, the production conditions for a specific char application are suggested. The obtained data will be used in Part 2 of this research, devoted to subsequent CFD modeling of the process. info:eu-repo/grantAgreement/EC/H2020/721991/EU/Advanced Carbon Materials from Biowaste: Sustainable Pathways to Drive Innovative Green Technologies/ GreenCarbon This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 721991- GreenCarbon info:eu-repo/grantAgreement/EC/H2020/731101/EU/ Biofuels Research Infrastructure for Sharing Knowledge II/BRISK II This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 731101-BRISK II info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 5.3 2024 ENGINEERING, CHEMICAL 42 / 176 = 0.239 2024 Q1 T1 ENERGY & FUELS 75 / 182 = 0.412 2024 Q2 T2 1.124 2024 Chemical Engineering (miscellaneous) 2024 Q1 Fuel Technology 2024 Q1 Energy Engineering and Power Technology 2024 Q1 9.5 2024 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Kienzl, Norbert Dieguez-Alonso, Alba Fierro, Vanessa Celzard, Alain Arauzo, Pablo J. Hedin, Niklas Prins, Wolter Anca-Couce, Andrés (orcid)0000-0002-0118-3254 Manyà, Joan J. Universidad de Zaragoza Ronsse, Frederik 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 38, 11 (2024), 9751–9771 Energy fuels Energy and Fuels 0887-0624 1228056 http://zaguan.unizar.es/record/136003/files/texto_completo.pdf Postprint info:eu-repo/date/embargoEnd/2025-05-31 993618 http://zaguan.unizar.es/record/136003/files/texto_completo.jpg?subformat=icon icon Postprint info:eu-repo/date/embargoEnd/2025-05-31 oai:zaguan.unizar.es:136003 articulos driver 2026-02-17-20:44:24 ARTICLE