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The Natural Gas Properties app calculates thermodynamic and calorific properties of Natural Gas mixtures.

Calculated Properties:

- Molar Weight
- Specific Gravity
- Compressibility Factor
- Mass/Mole/Volumetric Lower/Higher Heating Values
- Wobbe Index
- Motor Octane Number (MON)
- Methane Number (MN)
- Hydrocarbon Dew Point @ P
- Hydrocarbon Dew Point @ 1 atm
- Water Dew Point @ P
- Water Dew Point @ 1 atm
- Water Content in ppmv


Compressibility Factor, Density and Dew Points are calculated with the Peng-Robinson Equation of State (PR EOS). Heating Values are calculated according to Brazilian Standard NBR 15213 (Calculation of calorific values, density, relative density and Wobbe index of combustible gases from composition), which is equivalent to the ISO Standard 6976:1995 (Natural gas - calculation of calorific values, density, relative density and Wobbe index from composition).

Input Options:

Input options include mole and mass fractions/percentages, temperature and pressure.
Supported Systems of Units: SI, CGS and Imperial (English).

Output Options:

- Table view
- Shareable text report


The data and information within this app has been obtained from a wide variety of literature sources. While reasonable care has been exercised in the collection of data and testing of this software, the author disclaims any warranty, expressed or implied, as to the accuracy or reliability of the data or calculations contained therein. The results of calculations obtained from this app yield approximate results, which will not always be suitable for every application. The software is designed for use by trained professional personnel and is not a substitute for sound professional judgment. It is the sole responsibility of the user to validate the data presented by this app and to determine whether the results of this program are accurate and suitable for any specific purpose. No guarantee of accuracy or fitness for any purpose is expressed or implied. The author and contributors strongly recommends that the data be checked against other sources and/or methods before use and application. The author of the app shall not be held liable for any direct, indirect, consequential or incidental damages incurred through use of the data or calculations.

You are allowed to use this product only within the laws of your country/region. SharewareOnSale and its staff are not responsible for any illegal activity. We did not develop this product; if you have an issue with this product, contact the developer. This product is offered "as is" without express or implied or any other type of warranty. The description of this product on this page is not a recommendation, endorsement, or review; it is a marketing description, written by the developer. The quality and performance of this product is without guarantee. Download or use at your own risk. If you don't feel comfortable with this product, then don't download it.

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