Effects of Flue Gas Addition on the Premixed Oxy-methane Flames in Atmospheric Condition

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7 Citations (Scopus)

Abstract

This numerical study investigates the flame characteristics of premixed methane with various inert gas dilutions in order to simulate oxy-combustion of hydrocarbon fuels with flue gas recirculation system. In general, a flue gas consists of high concentration CO2/H2O and high gas temperature. The diluent gas in oxy-combustion has been changed compared with air-combustion, so that the flame behavior and combustion characteristics of oxy-fuel must be influenced. By observing the resultant flame temperature and species concentration profiles can identify that the flame location shifts, and the concentration profile of major chemical reaction radicals varies, indicating the change of flame structure and flame chemical reaction paths. The dominant initial consumption reaction step of methane shifts from R53 (H+CH4=CH3+H2) to R98 (OH+CH4=CH3+H2O) when nitrogen is replaced by the recirculated gases. It is because that the chemical effects of the recirculated gases changes the flame reaction pathway, and further affect reaction rate, species and radical concentrations.

Original languageEnglish
Pages (from-to)3054-3059
Number of pages6
JournalEnergy Procedia
Volume75
DOIs
Publication statusPublished - 2015 Jan 1
Event7th International Conference on Applied Energy, ICAE 2015 - Abu Dhabi, United Arab Emirates
Duration: 2015 Mar 282015 Mar 31

All Science Journal Classification (ASJC) codes

  • Energy(all)

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