MILD Oxy - Fuel Combustion of Model Gas from Biomass Pyrolysis (Abstract/Poster in convegno)

Type
Label
  • MILD Oxy - Fuel Combustion of Model Gas from Biomass Pyrolysis (Abstract/Poster in convegno) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Alternative label
  • P. Sabia, M. de Joannon, A.Picarelli, R. Ragucci (2012)
    MILD Oxy - Fuel Combustion of Model Gas from Biomass Pyrolysis
    in 34th International Symposium on Combustion, Warsaw, Poland, July 29 - August 3, 2012
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • P. Sabia, M. de Joannon, A.Picarelli, R. Ragucci (literal)
Note
  • Poster (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto di Ricerche sulla Combustione, Napoli, ITALY Istituto di Ricerche sulla Combustione, Napoli, ITALY Istituto di Ricerche sulla Combustione, Napoli, ITALY Istituto di Ricerche sulla Combustione, Napoli, ITALY (literal)
Titolo
  • MILD Oxy - Fuel Combustion of Model Gas from Biomass Pyrolysis (literal)
Abstract
  • MILD combustion is a very attractive technology in energy production from diluted gas deriving from bio or thermochemical degradation of biomass for its intrinsic features. An effective use of such a technology for diluted fuel needs a thorough analysis of ignition and oxidation behavior to highlight the potential effect of the different fuel components on the basis of temperature and diluent/oxygen/fuel mixture composition. In this work ignition and oxidation of a model gas surrogating the gaseous fraction of biomass pyrolysis products containing C1-C2 species, CO and CO2 were experimentally and numerically studied in a wide ranges of temperature and overall composition in presence of large amount of CO2. Experimental results showed that the presence of CO2 significantly alters the evolution of the ignition process in dependence on temperature range, even though the measured ignition delay times are still compatible with characteristic time required in practical applications. The kinetic model used reproduces the main features of ignition and oxidation process also in such a non standard condition. It allowed for pointing out that both the methyl recombination channel and the CO/CO2 equilibrium reaction causes a delay of the ignition time in presence of CO2 with respect to the system diluted in N2. In low temperature range the CO2 efficiency effect as third body in methyl recombination prevails in the increase of ignition time. The system sensitivity to CO2 increase at high temperature where the CO/CO2 equilibrium reaction is affected by CO2 presence. Nevertheless further analyses are mandatory to improve the model ability to reduce the discrepancy between numerical and experimental data obtained in MILD oxy-fuel mode with particular attention to methyl recombination channel as well as the equilibrium of reaction CO + OH = CO2 + H. (literal)
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