The 2.0 Version of ProMax includes a number of multiphase flow correlations in addition to the original Correlations included in the 1.2 Version. The original correlations were: Beggs and Brill, Dukler et al, Duns & Ros, and Orkiszewski. New correlations are: Aziz-Govier-Fogarasi, Lockhart-Martinelli, Lockhart-Martinelli Modified, Mandhane-Gregory-Aziz, OLGAS 2-phase, and OLGAS 3- ...

Although you can model any column (for example an amine absorber) using real stages, ideal stages are recommended because the column executes much faster and calculations are much more stable. If you are designing an amine unit, you should ALWAYS use ideal stages in the absorbers and strippers rather than real stages. If necessary, a real stage model based upon the ideal stage design can ...

When ProMax performs the freeze-out analysis calculations for a stream with a very low water content (e.g. dehydrated natural gas), the water dew point may not be calculated or the value may not be meaningful. In most cases a liquid water phase will not form, or will not be thermodynamically stable for the current conditions. Sublimation will occur instead of condensation, meaning that th ...

Part Per …. Dallas?

Some people get so caught up with the specifications that are handed to them or expected of their plants that they lose track of what they really mean. There is very little to put these numbers to a scale that can be really understood.

Here’s a quick try for both parts per million (ppm) and parts per billion ...

In certain cases there may be two hydrocarbon dew points as shown in the phase envelope below for a pressure of 1000 psia. The Dew Point Temperature reported by the Vapor Pressure Analysis in ProMax may not always be the highest dew point. A Phase Envelope Analysis should always be used along with the Vapor Pressure Analysis to check for retrograde condensation at operating conditions, an ...

Bryan Research and Engineering’s (BR&E’s) ProMax simulation software provides the user with ultimate flexibility in the use of measurement units. While several default unit sets are available for the operator to choose as his global preference, each individual Process Stream, Energy Stream or Unit Operation can be individually customized to mix and match units ...

With so many numbers that computer simulation programs can throw at you how do you know what numbers actually mean anything? One thing you have that a computer doesn’t is common sense. A computer knows only what it’s told, and for many programs it’s told to spew forth the total number of numbers that it can.

Here’s an example: 7 ...

One area where ProMax is getting a lot of attention is in Coal Gasification or IGCC processes.  Since IGCC involves partial oxidation rather than complete oxidation, the organically-bound sulfur is mainly converted to H2S rather than SO2.  The former is best removed from the crude Syngas exiting the gasifier by amine or physical solvent treating, which are well-modeled i ...

We at Bryan Research and Engineering continuously strive to improve upon our ProMax simulation software.  Did you know we have a development team constantly receiving requests from our clients, who have ideas which might improve the functionality of ProMax?  Those requests and ideas help shape future versions of ProMax, whether it be adding particular component interacti ...

Physical solvents are becoming increasingly popular as gas treating solvents, especially for coal gasification applications. ProMax accurately models a number of physical solvents such as DEPG (Coastal AGR), NMP or N-Methyl-2-Pyrrolidone (formerly Purisol), methanol (Rectisol), and others. The physical solvents tend to be favored over ethanolamine solvents when the concentration of acid g ...

Probably the most significant difference between ProMax and other amine sweetening simulators is that the ProMax Electrolytic ELR package uses the TSWEET Kinetic Model to predict the absorption of CO2 by amines. Thus the column hardware parameters (diameter, tray spacing, weir height) are very important to the model since these parame­ters are used to calculate the residence time ...

All amine sweetening models are different, even if they have the same name or start with the same basic equation. The models may be based on different criteria: correlations, mass transfer, equilibrium with efficiencies, etc. After the basis for the model is estab­lished, each software vendor fits equilibrium data into the simulator differently and makes many proprietary modificat ...

The ProMax simulation software allows the User to develop a predictive model that can let you know how a processing plant will respond to changing conditions.  While still a steady-state model, ProMax performs iterative calculations, rating and adjusting equipment performance within each iteration, until convergence is achieved.  Thus, a “snapshot” of ...

The ProMax Scenario Tester is an extremely useful simulation tool. It is an add-in for Microsoft Excel (2000 or greater) that allows you to run multiple cases automatically by importing data for each scenario from an Excel sheet. The Excel sheet can be embedded in the ProMax project, or it can be completely separate. The scenario tester also exports selected ProMax results from each run t ...

Interest in simulating caustic treating processes for removal of acid gas from both vapor and liquid hydrocarbon streams has increased significantly. ProMax can accurately predict the absorption of acid gas compounds and sulfur species such as CO2, H2S, and mercaptans from liquid or vapor streams by caustic (NaOH) solutions. When modeling a system containing NaOH, an Electrolytic Property ...

The most common use for a Propagation Terminal in ProMax^® is in a propane refrigeration loop, where the duty required by a Heat Exchanger or Process Chiller(s) is used to determine the flow rate of the refrigerant within the loop.  Since this calculated flowrate will be propagated in both an upstream as well as downstream direction, at some point in ...

Did you know that BR&E has security keys for Parallel, USB, and PCMCIA ports?  With many of the newer laptops today shunning the inclusion of a 25-pin parallel port, USB type security keys are becoming ever more popular.  BR&E will swap out your current hardware key at your request.  Simply send an email request to

In today’s high speed world, the typical Process Engineer does not have the opportunity to work with his process simulation tools on a daily basis. Because of this, it is often difficult for the engineer to remain up to date and proficient in the use of this most important tool. The people at Bryan Research and Engineering (BR&E) recognize th ...