降低减压渣油延迟焦化石油焦产品硫含量的研究
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摘要
基于砜与亚砜的化学键键能低于噻吩的化学键键能,提出采用乙酸/双氧水氧化体系对减压渣油进行预氧化处理以降低延迟焦化石油焦产品的硫含量,同时考察了氧化减黏、水力空化强化氧化-减黏等工艺对延迟焦化石油焦硫含量的影响。结果表明,在水力空化压力8 MPa下处理1次,并在410℃下减黏1 h时石油焦硫含量的降低效果最佳,硫质量分数由初始的4.12%降低至3.21%,同时产品分布数据表明,此条件下石油焦产率降低2.35百分点,液体收率提高1.93百分点。
Based on the knowledge that the chemical bond energy of sulfone and sulfone is lower than that of thiophene,it was proposed that the vacuum residue was pre-oxidized to reduce the sulfur content of the coke from delayed coking with acetic acid/hydrogen peroxide oxidation system.The effect of viscosity reduction by oxidation and the oxidation-viscosity reduction process assisted with hydrodynamic cavitation technology on the desulfurization of the petroleum coke were investigated.The results showed that the desulfurization of petroleum coke reached the best at the reaction conditions:cavitation pressure of 8 MPa,400℃,reaction time 1 h,and treating only once.The sulfur content of petroleum coke was reduced from 4.12% to 3.21%,and the coke yield reduced by 2.35 percentage points,the liquid yield increased by 1.93 percentage points.
Based on the knowledge that the chemical bond energy of sulfone and sulfone is lower than that of thiophene,it was proposed that the vacuum residue was pre-oxidized to reduce the sulfur content of the coke from delayed coking with acetic acid/hydrogen peroxide oxidation system.The effect of viscosity reduction by oxidation and the oxidation-viscosity reduction process assisted with hydrodynamic cavitation technology on the desulfurization of the petroleum coke were investigated.The results showed that the desulfurization of petroleum coke reached the best at the reaction conditions:cavitation pressure of 8 MPa,400℃,reaction time 1 h,and treating only once.The sulfur content of petroleum coke was reduced from 4.12% to 3.21%,and the coke yield reduced by 2.35 percentage points,the liquid yield increased by 1.93 percentage points.
引文
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[16] Askarian M,Vatani A,Edalat M.Heavy oil upgrading via hydrodynamic cavitation in the presence of an appropriate hydrogen donor[J].Journal of Petroleum Science and Engineering,2017,151:55-61
[17] Askarian M,Vatani A,Edalat M.Heavy oil upgrading in a hydrodynamic cavitation system:CFD modelling,effect of the presence of hydrogen donor and metal nanoparticles[J].The Canadian Journal of Chemical Engineering,2017,95:670-679
[2] Shelwit H,Alibrahim M.Extraction of sulfur and vanadium from petroleum coke by means of saltroasting treatment[J].Fuel,2006,85(5):878-880
[3] 刘鑫,张保申,周志杰,等.高温热处理对石油焦结构及气化活性的影响[J].石油学报(石油加工),2011,27(1):138-143
[4] Zhao Bin,Luo Yingtao,Su Ziwei,et al.Development on the petroleum coke desulfurization [J].Carbon Technologies,2011,30(2):30-32
[5] Mc Millen D F,Golden D M.Hydrocarbon bond dissociation energies[J].Ann Rev Phys Chem,1982,33(10):493-532
[6] Herron J T.Thermochemistry of sulfoxides and sulfones[C]//Patai S,Rappoport Z,Stirling C.The chemistry of sulphones and sulphoxides.Chichester:Wiley Publishers,1988:95-106
[7] Webster A B,Small N J H,Rigby R.Desulfurization of heavy oils:The United States,US 3163593[P].1964-12-29
[8] Lee H C,Butt J B.Kinetics of the desulfurization of thiophene:Reactions of thiophene and butane[J].J Catal,1997,49(3):320-331
[9] Scarsella M,Verdone N,De Filippis P.Peroxyformic acid formation:A kinetic study[J].Ind Eng Chem Res,2009,48(3):1372-1375
[10] De Filippis P,Scarsella M,Verdone N.Oxidative desulfurization Ⅰ:Peroxyformic acid oxidation of benzothiophene and dibenzothiophene[J].Ind Eng Chem Res,2010,49(10):4594-4600
[11] 王继乾.添加物对渣油热反应生焦的影响及作用机理研究[D].北京:中国石油大学,2006
[12] Dickie J P,Yen T F.Macrostructure of the asphaltic fraction by various instrumental method[J].Anal Chem,1967,39(14):1847-1857
[13] 梁文杰.石油化学[M].北京:中国石油大学出版社,2008:305-306
[14] 李和杰,黄新龙,张海燕,等.一种延迟焦化工艺:中国,CN 200910065261.0[P].2012-06-27
[15] 李和杰,黄新龙,张海燕,等.一种改进的延迟焦化工艺:中国,CN 200910065262.5[P].2012-12-12
[16] Askarian M,Vatani A,Edalat M.Heavy oil upgrading via hydrodynamic cavitation in the presence of an appropriate hydrogen donor[J].Journal of Petroleum Science and Engineering,2017,151:55-61
[17] Askarian M,Vatani A,Edalat M.Heavy oil upgrading in a hydrodynamic cavitation system:CFD modelling,effect of the presence of hydrogen donor and metal nanoparticles[J].The Canadian Journal of Chemical Engineering,2017,95:670-679