吸热燃料裂解产物分析及裂解过程推测OA北大核心CSTPCD

The gas-liquid products of endothermic hydrocarbon fuel pyrolysis were qualitatively and quantitatively analyzed using comprehensive two-dimensional gas chromatography coupled with mass spectrometry and flame ionization detector(GC×GC-MS/FID)and a micro gas chromatograph.The pyrolysis process was then studied based on the analysis results.The results indicate that the gas phase products are primarily hydrogen,methane,ethylene,ethane,and propylene.The liquid phase products at lower pyrolysis temperatures consist mainly of uncracked raw materials and low molecular weight alkenes,cycloalkenes,unsaturated hydrocarbons,alkylbenzenes,and indenes.At 680-700℃,the content of low molecular weight unsaturated hydrocarbons in the products shows a turning point,while the aromatic hydrocarbon content begins to increase sharply.The change in component content suggests that the cracking process first involves the production of small molecular gases and low molecular weight olefins.As the cracking temperature increases,the content of low molecular weight olefins rises,and some of these olefins are further converted into aromatic hydrocarbons.