title: [Investigation of a gas chromatographic column system for the on-line analysis of gaseous components in de-propane tower of pyrolysis equipment].
abstract: 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, C2-hydrocarbons, propane, propene, methylacetylene, propadiene and C4-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.
authors.affiliation: Guangzhou Petrochemical Complex Ethylene Plant, Guangzhou 510700, China.
authors.forename: H
authors.initials: H
authors.lastname: Cai
authors.forename: L J
authors.initials: LJ
authors.lastname: Liu
authors.forename: J
authors.initials: J
authors.lastname: Yan
authors.forename: X
authors.initials: X
authors.lastname: Lu
authors.forename: F
authors.initials: F
authors.lastname: Ye
authors.forename: G W
authors.initials: GW
authors.lastname: Xu