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Indirect Measurement of Nitrogen in a Multi-Component Natural Gas by Heating the Gas

Abstract: 

Methods of indirectly measuring the nitrogen concentration in a natural gas by heating the gas. In two embodiments, the heating energy is correlated to the speed of sound in the gas, the diluent concentrations in the gas, and constant values, resulting in a model equation. Regression analysis is used to calculate the constant values, which can then be substituted into the model equation. If the diluent concentrations other than nitrogen (typically carbon dioxide) are known, the model equation can be solved for the nitrogen concentration.

Patent Number: 
6,754,592
Date Of Issue: 
06/22/2004
Inventors: 

Thomas B. Morrow; Kendricks A. Behring II