A chemical reactor is the vessel or enclosed space where a chemical reaction takes place. Reactor design brings together reaction chemistry, process conditions, equipment, and economics. This lesson introduces what reactors do, what engineers consider when designing them, and the ideal models used to describe their behavior.
A chemical reactor is an enclosed volume in which a chemical reaction occurs. In chemical engineering, it is generally a process vessel designed to carry out a reaction as part of a larger production process. Reactors are one of the classic unit operations studied in chemical process analysis.
All flashcards
What is a chemical reactor?
An enclosed volume in which a chemical reaction occurs, usually as part of a production process.
What is chemical reaction engineering?
The branch of chemical engineering concerned with reactors and their design, applying kinetics to industrial systems.
What economic goal guides reactor design?
Maximizing process net present value by balancing product yield and efficiency against investment and operating costs.
What distinguishes a semibatch reactor?
It combines a batch charge with continuous feeding or removal of material.
Why can catalytic reactor rates differ from intrinsic kinetics?
Transport, mixing, catalyst contact, and access to active sites can affect observed reaction rates.
Quiz questions
Why might a reactant be fed gradually into a semibatch reactor?Answer: To control the addition rate and limit unwanted side reactions.
Why can observed reaction rates in catalytic reactors differ from intrinsic chemical kinetics?Answer: Transport and mixing can limit reactant access to catalyst sites or product removal.
Which condition is part of the ideal plug flow reactor model?Answer: Fluid elements do not mix with material ahead of or behind them axially.
Why does a batch reactor operate transiently during a reaction?Answer: Its material composition changes over time as the reaction proceeds.
How may a tubular reactor be designed for substantial heat removal from a strongly exothermic reaction?Answer: As a heat exchanger that transfers heat away from the reacting material.
Based on the Wikipedia article Chemical reactor, licensed CC BY-SA 4.0. Adapted into a summary, flashcards and quizzes.