Thermal decomposition of bio-oil: Focus on the products yields under different pyrolysis conditions

Chhiti Younes, Salvador Sylvain, Commandre Jean-Michel, Broust François. 2012. Thermal decomposition of bio-oil: Focus on the products yields under different pyrolysis conditions. Fuel, 102 : pp. 274-281.

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Quartile : Q1, Sujet : ENGINEERING, CHEMICAL / Quartile : Q1, Sujet : ENERGY & FUELS

Abstract : In this study, pyrolysis process of wood bio-oil was studied. The effects of temperature in the range 550- 1000 _C, heating rate in the range 2-2000 _C s_1 and ash content of the bio-oil on char, tar and gas yields were investigated. The main gas species generated are quantified by Micro-GC: H2, CO, CO2, CH4 and trace amounts of C2H4 and C2H6. A temperature increase from 550 to 1000 _C enhanced greatly the gas yield, whilst solid and liquid yields decreased significantly. The heating rate was varied in a range covering rapid pyrolysis using the Horizontal Tubular Reactor (HTR) to flash pyrolysis using an Entrained Flow Reactor (EFR). A decrease of char yield from 11 wt.% down to 4 wt.% was observed when heating rate is changed from 2 to 100 _C s_1. In EFR a flash heating rate of 2000 _C s_1 led to a char yield as low as 1 wt.%. Bio-oil with a natural ash contents of 0.05 wt.% and bio-oil added with 3 wt.% of ash were finally pyrolyzed. Ash seems to favor re-polymerization reactions that lead to an increase in char yield. A decrease in the amount of gas is observed when ash is added while an increase was a priori expected. (Résumé d'auteur)

Mots-clés Agrovoc : Bois, Pyrolyse, Charbon de bois, Traitement thermique, Huile végétale, Bioénergie, Gazéification, Gaz

Mots-clés complémentaires : Carbonisation, Goudron

Classification Agris : K50 - Processing of forest products
P06 - Renewable energy resources

Champ stratégique Cirad : Axe 2 (2005-2013) - Biomasse énergie et sociétés du sud

Auteurs et affiliations

  • Chhiti Younes, Ecole des mines d'Albi (FRA)
  • Salvador Sylvain, Ecole des mines d'Albi (FRA)
  • Commandre Jean-Michel, CIRAD-PERSYST-UPR Biomasse-énergie (FRA) ORCID: 0000-0001-9094-7879
  • Broust François, CIRAD-PERSYST-UPR Biomasse-énergie (FRA) ORCID: 0000-0003-3132-6495

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