IMPROVEMENT FOR THE NATURAL-GAS ANALYSIS

This work concerns two chromatographic methods for the natural gas analysis. The first method can achieve the quantitative analysis of nitrogen, carbon dioxide and light alkanes to n-pentane, the heavier hydrocarbons being detected together in a composite chromatographic peak (called C6+). The second method, more sophisticated, can achieve a complete analysis, particularly for hydrocarbons heavier than pentane. For the two systems, the rise of capillary columns improves the separations (compared to the classical chromatographic methods).