Explosion Behavior of CH4/O2/N2/CO2 Mixtures (Contributo in atti di convegno)

  • Explosion Behavior of CH4/O2/N2/CO2 Mixtures (Contributo in atti di convegno) (literal)
  • 2010-01-01T00:00:00+01:00 (literal)
  • 10.4405/ptse2010.IV2 (literal)
Alternative label
  • Cammarota F.; Di Benedetto A.; Di Sarli V.; Salzano E., Russo G. (2010)
    Explosion Behavior of CH4/O2/N2/CO2 Mixtures
    in PTSE2010 - International Conference on “Processes and Technologies for a Sustainable Energy”, Ischia - Napoli - Italy
  • Cammarota F.; Di Benedetto A.; Di Sarli V.; Salzano E., Russo G. (literal)
  • doi: 10.4405/ptse2010.IV2 (literal)
  • Istituto Ricerche sulla Combustione - CNR - Napoli, Italy Dip. di Ingegneria Chimica - Università degli Studi di Napoli “Federico II (literal)
  • Explosion Behavior of CH4/O2/N2/CO2 Mixtures (literal)
  • 978-88-88104-11-9 (literal)
  • In order to reduce CO2 emissions, its capture from power generation plants and the subsequent sequestration in geological storages have been proposed. To favor the CO2 separation process and the achievement of lower NOx emissions, the fuel can be mixed with recycled exhaust gas and highly oxygen-enriched air. The use of oxygen-enriched air poses safety issues, since pure oxygen increases the laminar burning velocity and enlarges the flammability range with respect to air. On the other hand, the presence of CO2 decreases the laminar burning velocity, reduces the flammability range and the flame temperature of both hydrocarbons and hydrogen in air. When pure oxygen is used, the technology is termed oxy-fuel combustion. This technology clearly allows great advanteges, but the use of oxygen-enriched air for CO2/fuel mixtures poses severe safety issues, as both laminar burning velocity and flammability range may vary effectively [1]. In our previous paper we studied the combined effects of CO2 and O2 on the explosion parameters peak pressure, maximum rate of pressure rise and burning velocity of premixed CH4/O2/N2/CO2 and H2/O2/N2/CO2 both experimentally and numerically, by means of CHEMKIN package, by varying oxygen and CO2 content, at initial ambient pressure and temperature. In this work, we perform simulations of the ingition dealy time of the stoichiometric CH4/O2/N2/CO2 mixtures at NTP conditions at different CO2 contents and oxygen air enrichment factors (i.e., O2/(O2 + N2) molar ratios). (literal)
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