基于渣油结构表征的轻脱沥青油残炭超标原因分析
|
摘要
对溶剂脱沥青装置原料进行了窄馏分分离,并对窄馏分进行基本性质分析、质谱分析以及平均结构参数计算,研究了轻脱沥青油残炭值过高的主要原因。实验结果表明,随着窄馏分收率的增加,烷烃含量减少,芳烃含量增加,氢碳原子比逐渐降低,硫含量、氮含量、金属含量、相对分子质量和残炭值均呈现递增趋势。收率为21.6%～27.7%的窄馏分,它的残炭值大幅增加是导致轻脱沥青油残炭值过高,进而限制轻脱沥青油收率的主要原因;具有较多支链的低缩合芳烃含量的明显增加,是造成窄馏分残炭值过高的主要原因。
Narrow fractions were separated from raw materials of solvent deasphalting plant. The main reason for the excessive carbon residue in light deasphalted oil was analyzed through basic properties analysis,mass spectrographic analysis,and average structural parameter calculation of narrow fractions. The results show that alkane content decreased,and aromatic hydrocarbon content increases with the yield increasing of narrow fractions. The H/C ratio decreased gradually. The sulfur content,nitrogen content,metal content,relative molecular mass,and carbon residue content presented increasing tendency. Sharp increase of carbon residue of narrow fractions with the yield from 21.6% to 27.7% was the main reason for the excessive carbon residue and the yield limit of light deasphalted oil. The significant increase of low condensation aromatics with branched chains was the main reason for excessive carbon residue of the narrow fractions.
Narrow fractions were separated from raw materials of solvent deasphalting plant. The main reason for the excessive carbon residue in light deasphalted oil was analyzed through basic properties analysis,mass spectrographic analysis,and average structural parameter calculation of narrow fractions. The results show that alkane content decreased,and aromatic hydrocarbon content increases with the yield increasing of narrow fractions. The H/C ratio decreased gradually. The sulfur content,nitrogen content,metal content,relative molecular mass,and carbon residue content presented increasing tendency. Sharp increase of carbon residue of narrow fractions with the yield from 21.6% to 27.7% was the main reason for the excessive carbon residue and the yield limit of light deasphalted oil. The significant increase of low condensation aromatics with branched chains was the main reason for excessive carbon residue of the narrow fractions.
引文
[1]黄灏,傅徐钢,易发军,等.溶剂脱沥青工艺优化浅谈[J].润滑油,2010,25(4):61-64.
[2]沈本贤.我国溶剂脱沥青工艺的主要技术进展[J].炼油设计,2000,30(3):5-9.
[3]隆建.掺炼高温煤焦油提高劣质渣油溶剂脱沥青效果及机理研究[D].上海:华东理工大学,2012.
[4]李晓文.溶剂脱沥青的技术进展与工艺优化[J].中外能源,2007,12(2):68-75.
[5]Zirasefi M H,Khorasheh F,Ivakpour J,et al.Improvement of the thermal cracking product quality of heavy vacuum residue using solvent deasphalting pretreatment[J].Energy Fuels,2016,30(12):10322-10329.
[6]Shin S,Lee J M,Hwang J W,et al.Physical and rheological properties of deasphalted oil produced from solvent deasphalting[J].Chem Eng J,2014,257(6):242-247.
[7]史权,张霖宙,赵锁奇,等.炼化分子管理技术:概念与理论基础[J].石油科学通报,2016,1(2):270-278.
[8]中国石油化工总公司石油化工科学研究院.SH/T 0659-1998瓦斯油中饱和烃馏分的烃类测定法(质谱法)[S].北京:中国标准出版社,1998.
[9]梁文杰,阙国和,陈月珠.我国原油减压渣油的化学组成与结构Ⅱ.减压渣油及其各组分的平均结构[J].石油学报:石油加工,1991,7(4):1-11.
[10]洪琨,马凤云,钟梅,等.渣油重组分沥青质结构分析及其对临氢热反应过程生焦的影响[J].燃料化学学报,2016,44(3):357-365.
[11]张彪,王子军.掺炼糠醛抽出油对阿曼和伊朗渣油溶剂脱沥青过程的影响[J].石油炼制与化工,2004,35(3):12-14.
[2]沈本贤.我国溶剂脱沥青工艺的主要技术进展[J].炼油设计,2000,30(3):5-9.
[3]隆建.掺炼高温煤焦油提高劣质渣油溶剂脱沥青效果及机理研究[D].上海:华东理工大学,2012.
[4]李晓文.溶剂脱沥青的技术进展与工艺优化[J].中外能源,2007,12(2):68-75.
[5]Zirasefi M H,Khorasheh F,Ivakpour J,et al.Improvement of the thermal cracking product quality of heavy vacuum residue using solvent deasphalting pretreatment[J].Energy Fuels,2016,30(12):10322-10329.
[6]Shin S,Lee J M,Hwang J W,et al.Physical and rheological properties of deasphalted oil produced from solvent deasphalting[J].Chem Eng J,2014,257(6):242-247.
[7]史权,张霖宙,赵锁奇,等.炼化分子管理技术:概念与理论基础[J].石油科学通报,2016,1(2):270-278.
[8]中国石油化工总公司石油化工科学研究院.SH/T 0659-1998瓦斯油中饱和烃馏分的烃类测定法(质谱法)[S].北京:中国标准出版社,1998.
[9]梁文杰,阙国和,陈月珠.我国原油减压渣油的化学组成与结构Ⅱ.减压渣油及其各组分的平均结构[J].石油学报:石油加工,1991,7(4):1-11.
[10]洪琨,马凤云,钟梅,等.渣油重组分沥青质结构分析及其对临氢热反应过程生焦的影响[J].燃料化学学报,2016,44(3):357-365.
[11]张彪,王子军.掺炼糠醛抽出油对阿曼和伊朗渣油溶剂脱沥青过程的影响[J].石油炼制与化工,2004,35(3):12-14.