Application of Double Column Box Gas Chromatograph in Analysis of Pyrolysis Gas Composition
The significance of the composition analysis of cracking gas was expounded systematically.Two ten-way valves,three six-way valves,seven chromatographic columns,two thermal conductivity cell(TCD)detectors and one hydrogen flame ionization(FID)detector were arranged in parallel with two gas chromatographs.By using shunt sampling method,three-channel parallel,double detector detection,valve position switching,programmed temperature heating and column backblowing technology,the test results were output through three system flow paths,and the detection results were realized within 20 min.22 Components of ethylene plant cracking gas including carbon monoxide,carbon dioxide,hydrogen sulfide,hydrogen,nitrogen,oxygen and C1～C6 were quickly separated at one time,then quantitative calculation was carried out by external standard method.The results showed that the method had the advantages of good separation effect,simple operation,fast analysis speed,accurate quantification and good repeatability.
Pyrolysis gas compositionGas chromatographShunt samplingTemperature programExternal standard methodNormalization methodMethaneHydrogenSeparation
万方数据
维普
