I have recently been tasked with evaluating NOx (actually NOCl which would form from NOx and Cl2 if present) in our stack gas. We have had a few minor Cl2 excursions, but do not normally detect any NOx in our stack gasses.
We have a to stage process. in the second toluene is burned as a energy source, and excess O2 is present from oxidation air, so NOx should be formed.
The resultant gasses from this reactor,(about 60% Cl2, the rest CO, CO2, O2, N2 etc) are then recycled back to the first stage which is a fluidised bed of coke, silica and ore at about 1000 degrees C . There is no excess O2 from this reaction. In fact, aside from being the heat source, the purpose of using the coke is to scavage the oxygen released from the oxides in the ore.
I have nearly finished my report, which concludes that any NOx formed in the second stage reactor is stripped of its oxygen component in the fluidised bed. I am however having trouble finding direct literature to support my conclusions. I am looking for sources describing the catalytic effects of the coke (carbon) in dissociating the NOx molecule, in addition to the effects of the carbon combining with the oxygen preventing the reformation of the NOx.
I would appreciate any suggestions.
Edd
We have a to stage process. in the second toluene is burned as a energy source, and excess O2 is present from oxidation air, so NOx should be formed.
The resultant gasses from this reactor,(about 60% Cl2, the rest CO, CO2, O2, N2 etc) are then recycled back to the first stage which is a fluidised bed of coke, silica and ore at about 1000 degrees C . There is no excess O2 from this reaction. In fact, aside from being the heat source, the purpose of using the coke is to scavage the oxygen released from the oxides in the ore.
I have nearly finished my report, which concludes that any NOx formed in the second stage reactor is stripped of its oxygen component in the fluidised bed. I am however having trouble finding direct literature to support my conclusions. I am looking for sources describing the catalytic effects of the coke (carbon) in dissociating the NOx molecule, in addition to the effects of the carbon combining with the oxygen preventing the reformation of the NOx.
I would appreciate any suggestions.
Edd
