Numerical study on oxy-fuel combustion characteristics of industrial furnace firing coking dry gas

Estimated electric conductivities of thermal plasma for air-fuel combustion and oxy-fuel combustion with potassium or cesium seeding

“…However, examining the ionization energy of common combustion gases (such as carbon dioxide and water vapor) in comparison to alkali metals reveals that ionizing combustion gases is not possible even at elevated temperatures of oxy-fuel combustions near 3000 K. With oxy-fuel combustion (or oxygen combustion), the oxidizer is pure oxygen, rather than oxygen diluted with nitrogen and argon as in the case of conventional air-combustion. This absence of non-reacting gases (that would absorb a part of the released combustion heat) causes the combustion temperature to rise [ [66] , [67] , [68] , [69] , [70] , [71] , [72] , [73] ]. Even at 6000 K, no appreciable ionization is expected due to simple thermal ionization of combustion gases [ 74 ] if an atmospheric pressure is maintained.…”