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Communication Dans Un Congrès Année : 2014

The mechanism of biomass pyrolysis revealed by various analytical methods

Résumé

Numerous analytical methods are commonly used to reveal the mechanism of biomass pyrolysis: NMR, FTIR, GC/MS, etc. But all these methods are seldom combined under same biomass and heating conditions. Here we propose to combine the main cutting edge methods to understand biomass pyrolysis. Miscanthus pyrolysis is conducted under slow and fast pyrolysis conditions, with a good control of temperature history and quench of the solid. Mass transfer effects are carefully reduced by conducting pyrolysis in fixed bed reactor with a suitable flow rate of carrier gas. Then the following analyses are developed: (i) µGC for gas, (ii) GC*GC(heart-cutting)/MS-FID, SEC-MS and direct infusion high resolution MS for condensable products and intermediate species extracted by solvents from the char, (iii) high resolution 2D solid 1H-13C NMR, quantitative 1D 13C NMR and FTIR for the solid (biomass/biochar). Calorimetry and in-situ 1H NMR analyses [1] are also performed under similar thermal and mass transfer conditions as for high resolution NMR and MS analysis. During the talk, we will show how all these analytical methods are complementary and necessary to propose a generalized mechanism of biomass pyrolysis. [1] Dufour A., Castro-Diaz, M., Brosse N., Bouroukba M., Snape C.E., ChemSusChem, 7, 1258-1265, 2012.
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Dates et versions

hal-00992460 , version 1 (18-05-2014)

Identifiants

  • HAL Id : hal-00992460 , version 1
  • PRODINRA : 314316

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Yann Le Brech, Luc Delmotte, Jesus Raya, Nicolas Brosse, Sadio Cissé, et al.. The mechanism of biomass pyrolysis revealed by various analytical methods. PYRO 2014 (20th International Symposium on Analytical and Applied Pyrolysis), May 2014, Birmingham, United Kingdom. ⟨hal-00992460⟩
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