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This is set of homogeneous and gas phase reactions: A-->B-->C . The reaction scheme is carried...
This is set of homogeneous and gas phase reactions: A-->B-->C . The reaction scheme is carried out in a constant volume, ideal batch reactor at constant temperature. The first reaction is first order with respect to A with a rate constant k1 while the second reaction is zero order with a rate constant k2. Initially, the reactor contains only A at a concentration CA0. a) Derive expressions for the concentration of A, B, and C as a function of reaction time t
b) If k1 = 0.5 h−1, k2 = 3 mol/m3·h, and CA0 = 30 mol/m3, find the optimal time to reach a maximum yield of the desired product B, where yield is defined as YB/A = CB/CA0. What is the corresponding value of the maximum yield at this point in time? What constraints (if any) need to be placed on k1, k2, and/or CA0 in order to observe a maximum in the yield?
Solutions
Amanda K answered 2 years agoRelated Solutions
The elementary irreversible gas phase reaction A --> B + C is carried out in a...
The elementary irreversible gas phase reaction A --> B + C is
carried out in a PFR packed with catalyst. Pure A enters the
reactor at a volumetric flowrate of 20 dm3 /s at a
pressure of 10 atm and 450K.
CpA=40 J/mol.K HfA=-70 kJ/mol
(TR=273 K)
CpB=25 J/mol.K HfB=-50 kJ/mol
CpC=15 J/mol.K HfC=-40 kJ/mol
k = 0.133 exp ( E/R*[ 1/450 ? 1/T ] ) dm3 kg cat. s
with E = 31.4 kJ/mol
a) Plot the conversion and...
The elementary irreversible gas phase reaction A --> B + C is carried out in a...
The elementary irreversible gas phase reaction A --> B + C is
carried out in a PFR packed with catalyst. Pure A enters the
reactor at a volumetric flowrate of 20 dm3 /s at a
pressure of 10 atm and 450K. Consider that the heat is removed by a
heat exchanger jacketing the reactor. The flowrate of coolant
through the jacket is sufficiently high so that the ambient
exchanger temperature is constant at 50oC.
CpA=40 J/mol.K HfA=-70 kJ/mol
CpB=25 J/mol.K...
The elementary irreversible gas phase reaction A --> B + C is carried out in a...
The elementary irreversible gas phase reaction A --> B + C is
carried out in a PFR packed with catalyst. Pure A enters the
reactor at a volumetric flowrate of 20 dm3 /s at a
pressure of 10 atm and 450K. Consider that the heat is removed by a
heat exchanger jacketing the reactor. The flowrate of coolant
through the jacket is sufficiently high so that the ambient
exchanger temperature is constant at 50oC.
CpA=40 J/mol.K HfA=-70 kJ/mol
CpB=25 J/mol.K...
The gas phase reaction 2A + B →2C is carried out isothermally and isobarically. The reaction ...
The gas phase
reaction
2A + B →2C
is
carried out isothermally
and isobarically. The
reaction is first
order in A
and first order in B. The feed is equal molar in
A and B and the entering concentration of A is 0.5 mol/dm3. The
specific reaction rate is k = 4.0 dm3/mol s.
Write
the rate of
reaction, –rA,
solely as a
function of conversion,
evaluating all parameters.
The gas phase reaction 2A + B →2C is carried out isothermally and isobarically. The reaction ...
The gas phase
reaction
2A + B →2C
is
carried out isothermally
and isobarically. The
reaction is first
order in A
and first order in B. The feed is equal molar in
A and B and the entering concentration of A is 0.5 mol/dm3. The
specific reaction rate is k = 4.0 dm3/mol s.
Write
the rate of
reaction, –rA,
solely as a
function of conversion,
evaluating all parameters.
The gas phase reaction: 2A+B = 3C , is carried out in an isothermal packed bed...
The gas phase reaction: 2A+B = 3C , is carried out in an
isothermal packed bed reactor. The rate is first order with respect
to reactants A and B (second order overall) with the rate constant
of 14 [liter2 /mole kg of catalyst sec.]. The feed is 50% A, 25 % B
and 25 % inert at temperature of 500 K and P = 18 atm and a total
flow rate of 20 mole/sec. The exit pressure is measured to...
The elementary liquid phase reaction A + B C is carried out in a 550 dm3...
The elementary liquid phase reaction
A + B C
is carried out in a 550 dm3 reactor. The entering
concentrations of streams A and B are both 2-molar and the specific
reaction rate is 0.015 dm3/(mol*min).
1.1 Calculate the time to reach 80%conversion if the
reactor is a batch reactor filled to the brim.
1.2 Assuming a stoichiometric feed (10 mol A/min) to a continuous
flow reactor, calculate the reactor volume and space-time to
achieve 80% conversion if the reactor...
in the gas-phase reaction A + B --> C + 2D, it was found that when...
in the gas-phase reaction A + B --> C + 2D, it was found that
when 2 mole A, 1 mole B, and 3 mole D were mixed and allowed to
come to equilibrium at 25oC, the resulting mixture
contained 0.79 mole C at a total pressure of 1 bar. calculate (a)
the mole fractions of each species at equilibrium, (b)
Kx (c) K and (d) deltarGo
The following reversible gas-phase reaction is carried out in a 10 L batch reactor. A <->C...
The following reversible gas-phase reaction is carried out in a
10 L batch reactor.
A <->C -rA = CA – 0.5CC [mol/(L h)]
Determine the pressure, temperature, and gas phase composition
(mole fractions) in the reactor after 1
hour of operating adiabatically given the following initial
conditions and physical properties and the
assumption of ideal gas behavior:
P0 = 100 kPa, yA0 = 0.5, yC0 = 0.1, yinert=0.4, T0 = 500 K.
cpA = cpC = 10 J/mol K, cpinert...
Elementary , irreversible and isothermal gas phase reaction A+B--------- C. Reaction rate constant is 20M-1min-1 at...
Elementary , irreversible and isothermal gas phase reaction
A+B--------- C. Reaction rate constant is
20M-1min-1 at temeperature 80 degree celcius
. Feed flow rate (10L/min) to the plug flow reactor , which volume
is 80 litres, contains 2%A and 2%B and inert gas temperature of 80
degree celcius and pressure 6 bar . Calculate the conversion of
A.
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