HAP/VOC abatement assisted by H2O and H2 in MILD Combustion Condition (Contributo in atti di convegno)

Type
Label
  • HAP/VOC abatement assisted by H2O and H2 in MILD Combustion Condition (Contributo in atti di convegno) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Alternative label
  • P.Sabia, M. de Joannon (2011)
    HAP/VOC abatement assisted by H2O and H2 in MILD Combustion Condition
    in MCS-7, Seventh Mediterranean Combustion Symposium, chia laguna, cagliari, Italia, 11-15 settembre 2011
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • P.Sabia, M. de Joannon (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • IRC-CNR (literal)
Titolo
  • HAP/VOC abatement assisted by H2O and H2 in MILD Combustion Condition (literal)
Abstract
  • Mild combustion is a clean technology that relies on mixtures highly diluted and pre- heated to oxidize fuels in homogeneous conditions. High dilution levels allows for limited temperature gradient thus for reducing and controlling the emission of pollutant species such as NOx and particulate matter from energy production systems. Furthermore it can be employed also as a cleaning process in the post-combustion zone of industrial systems for the abatement of pollutant species present in exhausted gas flows. This paper deals with the oxidation/abatement of Hazardous Air Pollutants (HAP) and Volatile Organic Compound (VOC) species in Mild combustion regime. The system abatement efficiency may be increased whether an appropriate diluent and/or a fuel \"enhancer\" are employed. In case of water dilution or hydrogen as auxiliary fuel, pollutants oxidation can be more proficient since water and hydrogen propensity to give radicals in the thermal conditions typical of Mild combustion process. Therefore the attention has been focused on the effect of the diluent nature and the hydrogen addition to mixtures on the evolution of the oxidation process, by considering auto- ignition and oxidation times. The analysis has been carried on by means of numerical simulations realized using both nitrogen and/or water as diluent and several amounts of hydrogen. Results show that steam and hydrogen significantly affect the characteristic kinetic times (auto-ignition and oxidation times). Rate of production analysis were numerically performed to understand the chemical mechanisms involved in system diluted in water and/or in presence of hydrogen in a wide mixture inlet temperature range. (literal)
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