Investigation of a Gas Chromatographic Column System for the On-Line Analysis of Gaseous Components in De-Propane Tower of Pyrolys is Equipment
在线分析脱丙烷塔顶中气体组分的气相色谱柱系统研究

Multi-dimensional gas chromatograph has become an important process analyzer due to the advantages of high resolution and fast speed. According to the production requirement, a gas chromatographic column switching system has been investigated for the on-line analysis of gaseous components from high-pressure and lower-pressure de-propane towers of pyrolysis equipment. By using two different injection times on three injectors,and fore-flush and back-flush techniques, C\-2-hydrocarbons, propane, propene, methylacetylene, propadiene and C\-4-hydrocarbons can be separated on 7 columns in 7 minutes. The practical application showed the developed column system is suitable for the on-line monitoring of the production process.