Ideal tubular reactors with no axial mixing.
PFR (tubular) has no axial mixing; composition varies along length: V=F_A0∫dX/(-r_A). Higher conversion than a CSTR of same volume for positive-order reactions. Used for gas-phase and fast reactions; heat management along the tube is crucial.
Steam cracking occurs in tubular furnace reactors.
Plug flow reactors give the highest conversion for a given volume in many reactions, which makes them common for large continuous production.
Ideal tubular reactors with no axial mixing.
Plug flow reactors give the highest conversion for a given volume in many reactions, which makes them common for large continuous production.
A tubular reactor in which fluid moves with no axial mixing, so each element spends the same time in the reactor.
In a PFR the reactant concentration stays high along the length, so the rate is higher than in a CSTR, which runs at the low outlet concentration.
Typical applications include designing a tubular reactor for a gas-phase reaction at high temperature, sizing a plug flow reactor for a fast reaction with a short residence time and comparing the volume needed for plug flow and a CSTR to reach the same conversion.
Study "Batch and CSTR reactors" first (topic 82 of 100 in Materials & Chemical). It covers the groundwork this topic builds on.
Differential design equation. Pressure drop. Packed-bed reactors.
Steam cracking occurs in tubular furnace reactors.
The next topic is "Reactor design equations", which builds directly on this one.
It is classed as Advanced in Materials & Chemical (topic 83 of 100). It is an advanced topic. It assumes you are comfortable with the intermediate topics in Materials & Chemical.
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