(1)
Establish an experimental system for the removal of SO2 by pulse
corona discharge combined with in situ water absorption; (2) study
the effects of operation factors such as input energy, gas flow
rate, gas compositions and others on the removal of SO2; (3) Write
a thesis based on above study
The reaction SO2(g)+2H2S(g)←−→3S(s)+2H2O(g) is the basis of a
suggested method for removal of SO2 from power-plant stack gases.
The standard free energy of each substance are ΔG∘fS(s) = 0 kJ/mol,
ΔG∘fH2O(g) = -228.57 kJ/mol, ΔG∘fSO2(g) = -300.4 kJ/mol, ΔG∘fH2S(g)
= -33.01
kJ/mol.
C) If PSO2 = PH2S and the vapor pressure of water is 20 torr ,
calculate the equilibrium SO2 pressure in the system at 298 K.
One way to remove harmful “NOx” (NO and
NO2) atmospheric pollutants from flue gas is the
“thermal deNOx” process, in which NH3 is used to reduce
the NO to N2:
__4__ NO (g) + __1__ O2 (g) + ____ NH3 (g)
→ ____ N2 (g) + ____ H2O (g)
The research lab has several gas cylinders available for
studying this reaction, including one cylinder containing a mixture
of 3.0 wt% NO and 15 wt% O2 in an N2 diluent,
and...
Flue gas from a methane combustor is at 1400 K and 1 bar
pressure for stoichiometric combustion with air. Estimate the
radiant heat transfer to the walls of a 0.50-m square duct
maintained at 700 K. Assume the walls are black. Repeat the
calculation for an excess air ratio of 2.
What values can be calculated given only the mentioned data?
The flue gas from a furnace burning a fuel of negligible
nitrogen content is found to contain 12% CO2, 7.2%
O2, 1.1 % SO2 and 79.7%
N2
A pure, low molecular weight hydrocarbon gas is burnt in a
furnace giving a flue gas containing
10.8% CO 2 , 3.8% O 2 and the remainder nitrogen. Calculate the
atomic ratio, H/C, and from this
the formula of the fuel. Note that this analysis is on a dry
basis.
2nd part:
Calculate the analysis of the flue gases resulting from the
combustion of ethane with 100%
excess air. Give the results on a dry basis.
Sulfur dioxide (SO2 ) is a gas that is a polluant
responsible for acid rain. It can be formed by the following
reaction:
H2S (g) + O2 (g) ?
SO2(g) +
H2O(g) (unbalanced)
What volume of 4M H2S , in L, is required to react
with excess O2 to produce enough SO2 to fill
a cylinder that is 58ft long and has a diameter of 14ft at a
pressure of 551 torr and 24?C?
A nitric acid solution, pH=2.7, results from NOx
removal from a stack gas. Neglect ionic strength effects and the
temperature is 25oC. How much Na2CO3
must be added to neutralize this solution prior to discharge? (the
final pH=8.3. Assume that no weak acids are present in the scrubber
water.) What is the buffer intensity of the final
solution?
A fixed amount of SO2 gas occupies a volume of 0.0864 L at a
pressure of 8.15 atm and a temperature of 18oC. What will be the
volume, in L, occupied by this sample of SO2 gas when the pressure
is decreased to 0.632 atm while holding the temperature constant?
a) 9.31 L b) 1.11 L c) 4.23 L d) 1.41 L e) 3.33 L f) no correct
response