The composition of natural gas plays an important role in gas processing and transportation, and the main method for determination of the composition of natural gas is gas chromatography. In gas chromatography the efficiency of separation and the selectivity are the main characteristics of the analytical process. In this work the influence of the type of packed column on separation efficiency and selectivity during chromatographic analysis of natural gas under various conditions was investigated. The highest theoretical plate number was obtained with a Porapak R 4233 column (3 m), the best symmetry of the peaks was obtained with an OPN/Porous-Sil C Column 4355 (3 m), and the highest resolution was obtained with the Hayesep Q# 1754 (3 m), Hayesep D 4741 (2 m), and Porapak Q 1723 (2 m) columns. It was shown that optimization of operation conditions can significantly improve the efficiency and selectivity of chromatographic determination of the composition of natural gas.

中文翻译：

---

提高天然气色谱分析中组分分离的效率和选择性

天然气的成分在气体加工和运输中起着重要作用，测定天然气成分的主要方法是气相色谱法。在气相色谱中，分离效率和选择性是分析过程的主要特征。在这项工作中，研究了在各种条件下天然气色谱分析过程中填充柱类型对分离效率和选择性的影响。使用 Porapak R 4233 色谱柱 (3 m) 获得最高理论塔板数，使用 OPN/Porous-Sil C 色谱柱 4355 (3 m) 获得最佳峰对称性，使用 Hayesep 获得最高分离度Q# 1754 (3 m)、Hayesep D 4741 (2 m) 和 Porapak Q 1723 (2 m) 柱。