1. Stoichiometry
Completion requirements
Material / Energy Balance Calculations
The problems encountered in process calculations are combination of the following categories:
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Material balance
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Energy balance
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Without chemical reaction
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With chemical reaction
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Steady state
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Unsteady state
Steady State Processes:
Of course, this is the desired mode of operation for a majority of the processes in use today.
It optimizes production and minimizes costs for large commodity products when you have a stable feedstock.
Unsteady Processes—these are extremely important in the following situations:
Batch processes.
Start-up/shut down of continuous systems.
Continuous processes with changes in operating conditions or unplanned fluctuations due to control problems.