Lean premixed combustion has been mainly
developed for gas turbine applications. 7 There is no
major cooling step involved (see Fig. 6), and
combustion takes place in adiabatic conditions. For
premixed air and fuel, the adiabatic combustion
temperature can be controlled by the amount of
excess air. Limitations are given by flame instability
and the risk of backfire. Lean premixed combustion
could not be applied for very high air preheat
temperatures due to the tendency of self ignition.