Sulfur Dioxide(SO2)
The release of SO2 to the atmosphere is the primary cause of acid rain in the world.
Fossil fuel combustion at electric power-generating plants accounts for about70% of
the emissions.
Coal, Oil, and all other fossil fuels naturally
contain some sulfur.
Volcanic eruptions are another more localized natural source of SO2
SO2 + OH. HSO3.
HS
Volumetric flow rate : 50000 ft3/min
Assumption :
Ideal gas, 1atm, Iso-thermal reactor, No pressure drop, irreversible reaction
Check the input gas when the concentration of VOCs is 1.2 wt%
② Pseudo - Assumption
Rate determining step = Surface reaction
Almost catalyst reaction is determined by surface reaction
VOCs multi system = Toluene pure system
Average mole
In catalyst, oxygen produced from H202
With sodium hydroxide, luminol Dianion is formed
The oxygen reacts with luminol dianion
This product is very unstable, so decomposes to 5-aminophathalic acid
As the exited state, 5-aminophathalic acid relaxes to ground state
Excess energy is emitted as blue light
Alkaline luminol, H2O2 solution is used on detecting NO2
The presence o
In synthetic luminol process we need luminol’s precursor. That is
5- nitrophthalhydrazide. It is synthesized by the reaction of 3-nitrophthalic acid
with hydrazine. This process is condensation reaction. First, hydrazine(N2H4) is
heated with the 3-nitrophthalic acid. This reaction is most conveniently carried
out in the high-boiling solvent triethylene glycol. To boil off excess water, t
The luminol is activated with an oxidant. Hydrogen peroxide solution and sodium hydroxide is
used as the activator. In the presence of an catalyst, the hydrogen peroxide is decomposed to form
oxygen and water. The iron in potassium ferricyanide is a catalyst for the reaction.
When luminol reacts with the sodium hydroxide, a dianion is formed. The oxygen produced from
the hydrogen peroxi