采用全二维气相色谱-飞行时间质谱表征渣油接触裂化液体产物中含硫化合物

发布时间：2018-03-13 17:47

本文选题：全二维气相色谱　切入点：飞行时间质谱　出处：《石油炼制与化工》2017年04期 　论文类型：期刊论文

【摘要】：采用全二维气相色谱-飞行时间质谱(GC×GC-TOFMS)方法对渣油接触裂化液体产物中的含硫化合物进行分子水平表征,鉴定出苯硫醚、苯硫酚、噻吩类、苯并噻吩类、二氢苯并噻吩类、二苯并噻吩类、萘噻吩类、四氢二苯并噻吩类、苯并萘噻吩类、菲噻吩类、苯并二噻吩类及噻喃类等含硫分子。通过GC×GC-TOFMS的族分离和瓦片效应重点研究了渣油接触裂化液体产物中的噻吩类、苯并噻吩类及二苯并噻吩类化合物的碳数分布,并对油品加工过程中较关注的C_2烷基取代二苯并噻吩类化合物进行了单体分子识别。结合渣油接触裂化工艺考察了接触剂活性对渣油接触裂化液体产物中的含硫化合物的分子类型分布及碳数分布的影响,结果表明,同种渣油在不同接触剂作用下接触裂化的液体产物中含硫化合物的分子类型分布基本相似,但含量分布存在明显差异。对于碳数分布,以苯并噻吩类为例,采用强微反活性的接触剂时,液体产物中的低碳数烷基(C_1~C_3)取代苯并噻吩的分布占优势,而采用弱活性接触剂时,产物中较高碳数烷基(C_4~+)取代苯并噻吩的分布占优势。
[Abstract]:Full-two-dimensional gas chromatography-time-of-flight mass spectrometry (GC 脳 GC-TOFMS) was used to characterize sulfur compounds in residual oil contact cracking liquid products. Benzene sulfide, phenylthiophenol, thiophene, benzothiophene and dihydrobenzothiophene were identified. Dibenzothiophene, naphthothiophene, tetrahydrodibenzothiophene, benzonaphthylthiophene, phenanthothiophene, The distribution of carbon number of thiophene, benzothiophene and dibenzothiophene in residue contact cracking liquid products was studied by group separation and tipping effect of GC 脳 GC-TOFMS. The monomer molecular recognition of C _ 2-alkyl substituted dibenzothiophene compounds in the process of oil processing was also carried out. The effect of contact agent activity on sulfur content in residual oil contact cracking liquid products was investigated in combination with residuum contact cracking process. Effects of molecular type distribution and carbon number distribution of compounds, The results showed that the molecular type distribution of sulfur compounds in the liquid products of the same residue exposed to different contact agents was basically similar, but the content distribution was obviously different. For carbon number distribution, benzothiophene was taken as an example. The distribution of benzothiophene substituted by low carbon number alkyl C _ (1 / C _ (3)) in liquid product was dominant when the contact agent with strong micro-reactivity was used, while the distribution of benzothiophene was more dominant in the product with weak active contact agent than that with high carbon number alkyl group C ~ (4 ~).
【作者单位】：中国石化石油化工科学研究院;
【基金】：国家重点基础研究发展规划“973”项目(2012CB224801)
【分类号】：O657.63;TE624

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