Question

The mixture described below is being incinerated at 1000

C

with 50% excess
air and a residence time of 2.1 seconds. Principal Organic Hazardous
Constituents (POHCs) for this waste are benzene, chlorobenzene, and toluene.
The flow rate of gas from the incinerator is measured at 450 m3 /min at dry
standard conditions. The mole fraction of
O2
in the stack gas is 14%.
a) Determine if this emission meets requirements for
- POHCs
- Particulates
- HCl
b) Comment on the results
Compound Inlet (kg/h) Outlet (kg/h)
Benzene 2015 0.537
Chlorobenzene,
C H Cl 6 5
1150 0.109
Toluene 637 0.022
Xylene 3040 1.25
HCl - 10.7
Particulates - 2.5
Molar mass of HCl: 36.5 g/mol
 
 Y 
X
P
c
P
m



21
21
X: mole fraction of O2 corrected to the dry conditions
Y: mole fraction of O2 in the stack gas

Answer 1

The combination mentioned below is being burned at 1000°C for 2.1 seconds with 50% surplus air. This waste's primary organic hazardous constituents (POHCs) include benzene, chlorobenzene, and toluene. At dry standard conditions, the flow rate of gas from the incinerator is 450 m3/min. The mole fraction of O2 in the stack gas is 14%. a) Determine if this emission meets requirements for - POHCs Particulates HCl b) Comment on the results Inlet (kg/h) 2015 1150 Outlet (kg/h) 0.537 0.109 Compound Benzene Chlorobenzene, C6H5C1 Toluene Xylene HC1 Particulates 637 3040 0.022 1.25 10.7 2.5 Molar mass of HCl: 36.5 g/mol P. = P. (21-X) (21-Y) X: mole fraction of O2 corrected to the dry conditions Y: mole fraction of O2 in the stack gas