PROMAX

Promax. [Central Soya] Functional soy protein cone. 

Promax 70, Promax 70L, Promax 70LSL, Promax Plus. See Soybean (Glycine soja) protein Prometryn... 

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Pro Fam 974, 974 Fortified Promax 70 Promax 70L Promax 70LSL Promax Plus Promine ... 

First we demonstrate the accuracy of the Soave-Redlich-Kwong [4] equation of state (SRK EOS) in ProMax [5] software. The TEG dehydration contactor will be simulated by ProMax based on the SRK EOS. Finally, for ease of use the generated results are presented graphically. 

Figure 1. Comparison of calculated BTEX mole fractions in the liquid (x) and vapor (y) phases by SRK in ProMax with the experimental values reported in GPA RR 131.

Similarly in Figure 2, the calculated vapor-liquid-equilibrium K-values by the SRK EOS in ProMax is plotted as a function of the experimental values reported in GPA RR 131 for the same ranges as described for Figure 1. 

Three temperatures and two pressures, covering typical contactor operation ranges were studied. Figures 3 and 4 present the results of simulations using the SRK EOS in ProMax. Absorption of BTEX components is plotted as a function of temperature, pressure and glycol circulation rate. 

As shown in Figures 1 and 2 and Table 1, the ProMax SRK EOS can be used to estimate VLE of BTEX eompounds in glycol systems. 

ProMax 3.2, Bryan Research and Engineering, Inc, Bryan, Texas, 2011. 

Tutorial Example of Using MDEA for H2S Removal in ProMax.168... 

TUTORIAL EXAMPLE OF USING MDEA FOR H2S REMOVAL IN PROMAX... 

Example ProMax simulations for H2S removal using the MDEA process. 

Next, the feed stream needs to be defined. Exit the block editor, return to the flowsheet, and from the ProMax Streams library, drag a process stream onto the flowsheet and double-click on it. Rename it Feed Gas and assign a temperature of 44.4°C, 2 bar, and 8820 kmol/h. Click on the Composition tab and double-click on an empty... 

After placing the recycle block, two more unit operations are required. First, it is necessary to have a makeup solvent input to make up for solvent losses in the product streams. Without it, the solvent loop would dry up (and steady-state flowsheet convergence would not be possible in the simulator). To do this, use a Make-Up/Blow-Down block (it is in the ProMax Auxiliary Objects section) and corresponding... 

Software ProMax Aspen Pius ProMax ProMax ProMax ProMax... 

Finally, specify the makeup feed stream input to the second mixer to have a temperature of 35°C and pressure of 2 bar. To be an effective makeup stream, the flow rates of MDEA and H2O must equal the flow rates of those two components lost via the CO2 product and clean syngas streams. Although trivial to compute at the moment, once the recycle loop is closed, this number must be computed for each flow sheet convergence iteration in order to be able to physically achieve a steady state and prevent eventual dry-up of the solvent. Unlike ProMax, which has a Make-up/Blow-down block to handle this specific scenario. Aspen Plus has more generic tools that can be used instead. For example, a calculator block can be added that computes and sets the inlet composition and flow rate of the makeup feed stream for every flowsheet iteration. To do this, first configure the makeup stream to have a mole flow of H2O and MDEA of 1 kmol/h each. These are strictly dummy variables. However, it is critical that the Total Flow Rate is left blank. By specifying it in this manner, we are creating a specification in which the calculator block will be able to directly overwrite the dummy numbers of 1 kmol/h with its own calculations just before the second Mixer block executes. 

It should be noted that in ProMax, the TS WEET model can be used for MEA using a similar approach to that shown in Section 2.2. In Aspen HYSYS, MEA can be modelled using the DBR amine package (see Section 3.3). 

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