CAJ | 학술논문

建立了全二维气相色谱-飞行时间质谱（GC×GC-TOF MS）分析柴油馏分中饱和烃的分子组成的方法。结合谱库检索、质谱图解析、沸点与分子结构关系和全二维谱图特征，定性（或归类）了焦化柴油饱和烃组分中1057个化合物单体，其中正构烷烃排列规律性最强，一环~三环环烷烃按照极性和沸点的差异呈瓦片状分布在其上方。另外，还准确区分了在一维气相色谱上共流出的正构烷基环己烷和正构烷基环戊烷，以及正构α单烯烃。根据质谱采集的总离子流色谱图，采用峰面积归一化法得到了饱和烃组分的碳数分布结果，并将该方法应用于研究不同类型柴油馏分饱和烃的分子组成特点。结果表明，催化裂化和焦化柴油馏分饱和烃组分的化合物类型和分布各不相同。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。
건립료전이유기상색보-비행시간질보（GC×GC-TOF MS）분석시유류분중포화경적분자조성적방법。결합보고검색、질보도해석、비점여분자결구관계화전이유보도특정，정성（혹귀류）료초화시유포화경조분중1057개화합물단체，기중정구완경배렬규률성최강，일배~삼배배완경안조겁성화비점적차이정와편상분포재기상방。령외，환준학구분료재일유기상색보상공류출적정구완기배기완화정구완기배무완，이급정구α단희경。근거질보채집적총리자류색보도，채용봉면적귀일화법득도료포화경조분적탄수분포결과，병장해방법응용우연구불동류형시유류분포화경적분자조성특점。결과표명，최화열화화초화시유류분포화경조분적화합물류형화분포각불상동。분자조성분석능위유품가공공예궤리적연구제공방법지지。
An analytical method for separation and identification of the saturated hydrocarbons in diesels at molecular level by comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometry(GC×GC-TOF MS)was established. The saturated hydro-carbons were pre-separated from diesel samples by solid phase extraction before GC ×GC-TOF MS analysis. More than 1 000 individual compounds( including paraffins,naphthenes and ole-fins)in coker diesel were tentatively identified based on NIST library search,mass spectrum resolution, boiling point distribution law and separation characteristics. Normal paraffins showed great regularity and could be identified easily through the relative position with pristane and phytane. The cyclic alkanes arranged above paraffins with the increasing number of rings. The normal alkyl cyclohexanes and cyclopentanes were well distinguished due to the difference of their polarity. Normal α-olefins which were often neglected in the past were also identified. With the support of the above-introduced identification,the distribution by structural type and carbon number were presented using peak area normalization. This analytical method was suc-cessfully used to investigate the molecular composition of saturated fractions in different diesel samples. All the results indicated that the molecular compositions of saturates in catalytic cracking diesel and coker diesel were significantly different because of the processing mecha-nism. This method provided technical support for the characterization of saturated hydrocar-bons in diesels and the investigation of processing mechanism.