CAJ | 학술논문

采用Ag‐SiO2固相萃取法结合全二维气相色谱‐飞行时间质谱（GC × GC‐TOF MS）分析了大庆、胜利、辽河、塔河4种催化裂化柴油馏分中烯烃的组成特点。结果表明，胜利、辽河和塔河催化裂化柴油中的烯烃均由单烯烃、环烯烃、双烯烃、三烯或环二烯组成，各类型烯烃的碳数分布均呈单峰分布特点；大庆催化裂化柴油烯烃含量较低，仅检测出单烯烃和环烯烃系列。4种柴油烯烃均以单烯烃含量为最高，可占总脂肪烯的50％以上，但是正构α烯烃含量却都低于5％，说明催化裂化柴油中主要以内烯烃和异构烯烃为主。烯烃的类型和分布与加工过程的反应机理直接相关，通过分子组成分析，能为油品加工工艺机理的研究提供方法支持。
채용Ag‐SiO2고상췌취법결합전이유기상색보‐비행시간질보（GC × GC‐TOF MS）분석료대경、성리、료하、탑하4충최화열화시유류분중희경적조성특점。결과표명，성리、료하화탑하최화열화시유중적희경균유단희경、배희경、쌍희경、삼희혹배이희조성，각류형희경적탄수분포균정단봉분포특점；대경최화열화시유희경함량교저，부검측출단희경화배희경계렬。4충시유희경균이단희경함량위최고，가점총지방희적50％이상，단시정구α희경함량각도저우5％，설명최화열화시유중주요이내희경화이구희경위주。희경적류형화분포여가공과정적반응궤리직접상관，통과분자조성분석，능위유품가공공예궤리적연구제공방법지지。
Olefins were separated from four FCC diesels by Ag‐SiO2 solid‐phase extraction and characterized by comprehensive two‐dimensional gas chromatography coupled to time‐of‐flight mass spectrometry(GC × GC‐TOF MS) .The molecular compositions of the olefins from different sources were systematically investigated . The compound type and carbon number distribution analysis showed that olefin compounds including monoolefin ,diolefin ,cycloolefin ,triolefin and cyclodiolefin were found in Shengli ,Liaohe and Tahe FCC diesels ,and their carbon number distributions all presented unimodal peak character .Only monoolefin and cycloolefin were detected in Daqing FCC diesel .Monoolefin compounds occupied more than 50% (mass fraction)of the total olefin compounds in all four FCC diesels ,while the fraction of normal α‐olefins was just less than 5.1% ,indicating that internal olefin and isomeric olefin were dominant in olefin fraction of FCC diesels .The olefin type and distribution were influenced by processing mechanism .Thus ,more detailed knowledge about the catalytic cracking process could be achieved based on the analysis of olefin molecular compositions .