used for energy recovery in cases where relatively low pressure steam generation is acceptable such as bmw incineration in such energy recovery boilers temperatures below 425 u00b0 c typically occur upstream of the last downstream boiler pass and the carbon may therefore be safely introduced into the last boiler pass of such boilers in water tube boilers typically used for generating high pressure steam in msw incinerators and coal fired power plants the ignition safe temperature for carbon injection typically occurs in the boiler convective section or economizer and the carbon may be introduced in either of these sections at a point where the temperature has fallen below the ignition temperature referring again to fig1 the gas sorbent mixture exiting the energy recovery boiler 22 by means of line 44 is fed to a solids separator means 46 which may be an electrostatic precipitator fabric filter baghouse or other suitable separator means known to the art the spent sorbent containing the pre dioxin and pre furan reactants and the combustion process fly ash substantially free of pcdd pcdf are discharged by means of lines 48 and 50 from solids separator 46 and conveyed to disposal or collection bins not shown by means of line 52 the particulate free gas is passed by means of line 54 from solids separation device 46 to blower 56 and then is passed by means of line 58 to the stack 60 for exhaust to the atmosphere by means of line 62 referring now to fig2 a combustion chamber 110 such as a power plant is supplied with a chlorine containing fuel by means of line 112 and burned with air supplied by means of line 114 the temperatures in combustion zone 110 are for example in the range of from about 1000 u00b0.