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An elementary irreversible gas-phase reaction, A -> 2B, is taking place in an isothermal batch reactor....
An elementary irreversible gas-phase reaction, A -> 2B, is taking place in an isothermal batch reactor. Assume ideal gas behavior for both species. Initially, the reactor contains only the reactant A at a pressure of 5.0 atm, a volume of 20.0 L, and a temperature of 400 K. The rate constant at this temperature is 0.25 min-1. Find the time required for the concentration of A to drop below 5% of its initial value in these two scenarios:
(a) A constant volume batch reactor (pressure increases over
time)
(b) A constant pressure batch reactor, or equivalently a piston
(volume increases over time).
(c) Comparing the times required from parts (a) and (b): If they
are equal, why do you think this is the case, despite the different
conditions? In the other possibility where one reactor reached the
specified concentration sooner, why? What can you say about how
conversion compares in the two reactors?
Solutions
Amanda K answered 5 months agoRelated Solutions
The irreversible elementary reaction 2A > B takes place in the gas phase in an isothermal...
The irreversible elementary reaction 2A > B takes place in
the gas phase in an isothermal tubular reactor. The feed is one
mole of A per one mole of C, an inert. The entering temperature and
pressure are 427°C and 10 atm, respectively. The gas constant
R = 0.08206 atm · L/mol · K.
(a) Determine the concentration of A at the entrance to the
reactor.
(b) If CA0 = 1.0 mol/L, what is the
concentration of A at 90%...
The reaction A + 2B C + D is taking place in a batch reactor....
The reaction A + 2B C + D is taking place in a batch reactor.
(Cao =1M, Cbo = 3M k=0.001 (1/M^2*min)). a) Assuming an elementary
rate law, find the time necessary to reach the conversion of 0.9.
You can assume constant volume batch reactor with well mixing. Also
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to obtain numerical solutions to the complex integrals. Find the
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Example 2.7 Gas Phase Reaction Gas phase reaction is taking place in a continuous reactor. Stoicliioinetric...
Example 2.7 Gas Phase Reaction
Gas phase reaction is taking place in a continuous reactor.
Stoicliioinetric proportions of
CO2 and H2 are fed to tile reactor at +00o C. The
reaction proceeds to 80'a completion.
Given I mol of carbon dioxide, estimate the I)eat tllat dust be
provided or removed, if tile
gas exit steams are to be kept at 500'C. Perform the energy balance
using tile lleat of
reaction method at two reference teniperatuies (500'C and 25'C) and
the...
Example 2.7 Gas Phase Reaction Gas phase reaction is taking place in a continuous reactor. Stoicliioinetric...
Example 2.7 Gas Phase Reaction
Gas phase reaction is taking place in a continuous reactor.
Stoicliioinetric proportions of
CO2 and H2 are fed to tile reactor at +00o C. The
reaction proceeds to 80'a completion.
Given I mol of carbon dioxide, estimate the I)eat tllat dust be
provided or removed, if tile
gas exit steams are to be kept at 500'C. Perform the energy balance
using tile lleat of
reaction method at two reference teniperatuies (500'C and 25'C) and
the...
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.
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, elementary reaction: 2A + 1/2B ----> C + 2D will be conducted in a...
The gas-phase, elementary reaction: 2A + 1/2B ----> C + 2D
will be conducted in a constant volume, isothermal batch reactor.
The reactor is initially charged with a stoichiometric ratio of A
and B. The reaction is moderately exothermic and the heat of
reaction will be removed via cooling water. The following data is
available:
Initial Conditions: Initial concentration of A = Cao, initial
concentration of B = Cbo
Cooling water: inlet temperature = Ta1, outlet temperature =
Ta2, water...
Consider an irreversible 2nd-order reaction (A + B → C) in a batch reactor with the...
Consider an irreversible 2nd-order reaction (A + B → C) in a
batch reactor with the initial molar ratio of ΘB=CB0/CA0. Find the
relation between time (t) and conversion (XA). (Hint: You need to
consider cases of both CA=CB and CA≠CB.)
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