Notice of RetractionNumerical Study of Pulverized Coal Ignition Characteristics under O2/CO2 Atmosphere

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

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O₂/CO₂ combustion of pulverized coal is one of the promising new technologies in order to reduce the emission of CO₂ and NO_x from coal combustion furnaces. In this paper, an unsteady-state model of pulverized coal cloud consider the radiation and convection was used, by numerical simulation, a typical bituminous coal ignition characteristics was studied in air and O₂/CO₂ atmosphere and also carried out experiment study, experiment results are in good agreement with the calculated results. Results shows that when the atmosphere changed from air to O₂/CO₂, ignition delay time and ignition temperature both increased, the range of temperature increase is about 10-20 K.With the increase of coal concentration the ignition delay time and ignition temperature reduced under O₂/CO₂ atmosphere, the ignition delay time is reduced when the ambient temperature is increased, and the ambient temperature has a greater impact on ignition delay time under O₂/CO₂ atmosphere, leading a longer ignition delay time.