What are the advantages of PFR plug flow reactor?
What are the advantages of PFR plug flow reactor?
| Kinds of Phases Present | Usage | Advantages |
|---|---|---|
| 1. Primarily Gas Phase | 1. Large Scale 2. Fast Reactions 3. Homogeneous Reactions 4. Heterogeneous Reactions 5. Continuous Production 6. High Temperature | 1. High Conversion per Unit Volume 2. Low operating (labor) cost) 3. Continuous Operation 4. Good heat transfer |
Why conversion is higher in the plug flow reactor?
Rate of reaction is directly proportional to reactant concentration for positive order reactions. More the concentration more will be the rate. Hence PFR gives higher conversion than CSTR for positive order reactions.
Which is the drawback of the plug flow reactor?
Disadvantages of plug flow reactors are that temperatures are hard to control and can result in undesirable temperature gradients. PFR maintenance is also more expensive than CSTR maintenance. Through a recycle loop a PFR is able to approximate a CSTR in operation.
Why are plug flow reactors used?
Plug flow reactors have a wide variety of applications in either gas or liquid phase systems. Common industrial uses of tubular reactors are in gasoline production, oil cracking, synthesis of ammonia from its elements, and the oxidation of sulfur dioxide to sulfur trioxide.
What is ideal plug flow reactor?
In an ideal plug flow reactor, it is assumed that there is no mixing of the medium along the long axis (X-axis) of the reactor although there may be lateral mixing in the medium at any point along the long axis (ie the Y-axis).
What are plug flow reactors used for?
Currently, plug flow reactors are used in the production of biodiesel and other biofuels with a recycle system [9]. The plug flow reactor is mostly preferred for bioenergy production because of its steady-state operation. In addition, the plug flow reactor does not require any agitation or baffling.
What are ideal plug flow reactor characteristics?
Characteristics of ideal plug flow. PERFECT MIXING IN THE RADIAL DIMENSION (UNIFORM. CROSS SECTION CONCENTRATION) NO MIXING IN THE AXIAL DIRECTION, OR NO AXIAL.
How does a differential volume reactor work?
Each plug of differential volume is considered as a separate entity, effectively an infinitesimally small continuous stirred tank reactor, limiting to zero volume. As it flows down the tubular PFR, the residence time (
How to calculate the exit conversion for a plug flow reactor?
If there is a pressure drop in a plug flow reactor, 1 there are two equations needed to determine the exit conversion: one for the conversion, and one from the pressure drop. (1) d X d W = k ′ F A 0 (1 − X 1 + ϵ X) y (2) d X d y = − α (1 + ϵ X) 2 y Here is how to integrate these equations numerically in python.
What is the differential equation for plug flow reactor?
The plug flow reactor is characterized by the differential equation for species balance (3.17) m ˙ ″ ( d σ i /d x ) = ∑ ( v ″ i j − v ′ i j ) r j and for energy conservation
What is plug flow reactor?
The plug flow reactor is the second-most primary ideal reactor and is similar to the continuous stirred tank bioreactor. Here polymerization and conversion reactions are performed in noncatalytic mode. The polymerization of ethylene and the conversion of naphtha to ethylene are examples.