Makeup of Gas Streams

4 5 Flow Rate (Ib/hr Dissolved Gas 918 Front end tail (Native) 3992 Front end tai (Cracking) 2157 CraddngGas 1472 Air Leak 54 

16 16 Cracking as 1-2 FZTimpfC) 427 FZTemp(t) 427 Front end tail (Cracidng] 67  

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Under Cut/Blend sheet, the user can select a method to cut assay data into the pseudocomponent distribution. In this case, we choose Auto Cut , following the boiling point widths for cuts listed in Table 3.2. Since the VDU is operated under wet conditions, we will add makeup gas streams to represent cracked gases and add water and light components into the component list (Figure 3.10). We discuss the makeup of gas streams in Section 3.2.3. We choose the Peng-Robinson equation of state (EOS) for this model because of its thermodynamic consistency and better heat-balance calculation [1] (see Figure 3.11). 

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