AQUAlibrium©

Software for Phase Equilibria in Natural Gas-Water Systems

3-Phase

Welcome to the AQUAlibrium Web Page. Come in and feel free to browse. The purpose of this page is to introduce you to the AQUAlibrium software, its author: John J. Carroll, and to some aspects of the phase equilibria in natural gas-water systems.

In an attempt to make these web pages more than just an advertisement, we have accentuated the tutorial portion. If you have a suggestion for a tutorial on a subject related to AQUAlibrium, please let us know. We will certainly consider it. On these pages you will find discussions on: (1) three-phase equilibria, (2) the solubility of hydrogen sulfide in acids and bases, (3) natural gas hydrates, (4) sequestration of carbon dioxide in the ocean and (5) a paper on the history and development of AQUAlibrium. The paper on the history of AQUAlibrium offers some insight into our philosophy of phase behaviour calculations for these systems and shows the accuracy of AQUAlibrium. More tutorials will be added in the future.

As always, we have added several new sites to the Links Page. The links to Hydrates have been moved to their own page. A special thanks to those who suggested new links - to both pages.

If you would like more information about AQUAlibrium or any thing else on these pages, please contact us via E-mail at: FlowPhase or via regular mail at our regular mailing address:

FlowPhase
 #330, 2749 - 39 Avenue NE
Calgary, Alberta, CANADA T1Y 4T8

AQUAlibrium

AQUAlibrium is a software package for predicting the fluid phase equilibria in natural gas-water systems, in particular sour natural gas (i.e., natural gas containing hydrogen sulfide). AQUAlibrium can be used to perform calculations in regions where a condensate (a non-aqueous liquid) and an aqueous liquid are in equilibrium.

Calculations

There are three major groups of calculations:

  1. Vapor-Aqueous Liquid
  2. Vapor-Liquid-Liquid
  3. Liquid-Liquid

The programs can be used to calculate the equilibria in binary aqueous mixtures. This includes calculating the solubility of the gas in water under pressure.

Components

Currently, there are seven components built into the programs:

  1. Water
  2. Hydrogen Sulfide
  3. Carbon Dioxide
  4. Methane
  5. Ethane
  6. Propane
  7. Butane

If there is demand from our users, additional components will be added. The component list, as with all aspects of AQUAlibrium, is driven by the requirements of our users.

The seemingly small component list currently in the program (compared with general purpose simulators, for example) is because these necessary binary systems have been thoroughly study by the author and, based on this work, he has confidence that AQUAlibrium is the best available software for these systems. Check the list of publications for references to much of this work.

Versions

A STANDARD Version of AQUAlibrium, containing only the vapor-aqueous liquid, routines is available for those interested only in that type of calculation. The PROFESSIONAL Version includes all of the calculation modules. Both versions include all seven components.

CUSTOM Versions of the program can also be constructed. The advantages of a CUSTOM version include: (1) the addition of more components, (2) new calculation routines, (3) the inclusion of additional physical property, say viscosity, and (4) company specified, possible proprietary, calculation routines. CUSTOM Versions are delivered to a single client only. Any proprietary information will not be added to future updates of the STANDARD or PROFESSIONAL Versions of the software. The cost of CUSTOM Versions depends upon the nature of the required additions.

AQUAnews

AQUAnews is the newsletter for AQUAlibrium users. It contains news about updates to the software, applications (usually suggested by our users), and other information about AQUAlibrium.

Two sample newsletters are available on-line. These require Adobe Acrobat Reader to view.

For a free subscription to AQUAnews or to obtain copies of back issues please contact us.

AQUAlibrium Web Page Site Map:

This page, and all its contents, are Copyright © 1998 by John J. Carroll, Alberta, CANADA.
Please report problems with this page to the WEBMASTER.

const This page is continually under construction. Please come back in the near future. const
Page created: January 12, 1998
Last updated: June 11, 2001
Version 1.18

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