炼厂加氢脱氮反应条件模拟优化
|
摘要
对原油中典型的含氮化合物(喹啉和吲哚)的加氢脱氮反应进行了热力学分析,建立了非线性规划数学模型,考察了反应温度、反应压力、氢油比,化学平衡组成等因素对脱氮率的影响,并以最小消耗为目标进行了反应条件的优化。结果表明:低温、高压、高氢油比有利于脱氮反应的进行;利用该模型对柴油加氢装置工艺进行优化,在进料的含氮量为800μg/g,加氢反应过程氢油比为600(体积比),脱氮率为99%的条件下,达到相同的脱氮率,氢气的消耗相同。
The hydrodenitrification of the typical nitrogenous compound( quinoline and indole) in crude oil were analyzed thermodynamically,and the nonlinear programming( NLP) mathematical model were established,and the effects of temperature,pressure, hydrogen to oil, chemical equilibrium composition,etc on denitrification rate were investigated,and reaction conditions were optimized with the minimum exergy consumption as the aim. The results showed that lower temperature,higher pressure and higher hydrogen to oil were advantageous to the hydrodenitrogenation; the process conditions of diesel hydrogenation unit was optimized by the model,under the conditions of the feeding nitrogen800 μg/g,hydrogen to oil in the hydrogenation reaction process 600 and the nitrogen removal rate99%,the same nitrogen removal rate was achieved,and the hydrogen consumption was similar,indicating that the model had certain accuracy.
The hydrodenitrification of the typical nitrogenous compound( quinoline and indole) in crude oil were analyzed thermodynamically,and the nonlinear programming( NLP) mathematical model were established,and the effects of temperature,pressure, hydrogen to oil, chemical equilibrium composition,etc on denitrification rate were investigated,and reaction conditions were optimized with the minimum exergy consumption as the aim. The results showed that lower temperature,higher pressure and higher hydrogen to oil were advantageous to the hydrodenitrogenation; the process conditions of diesel hydrogenation unit was optimized by the model,under the conditions of the feeding nitrogen800 μg/g,hydrogen to oil in the hydrogenation reaction process 600 and the nitrogen removal rate99%,the same nitrogen removal rate was achieved,and the hydrogen consumption was similar,indicating that the model had certain accuracy.
引文
[1]Chen W Y,Luan X L,Guan Y D.Composition and characteristics of Chinese coker gatch oil[J].Petrochenical Technology,2000,29(8):607-612.
[2]Ali M A.Investigation of nitrogen compound types in high-boiling petroleum distillates from saudi arabian crude oils[J].Food Science&Technology International,1987,6(3):259-290.
[3]Scherzer J.Process for the catalytic cracking of feedstocks containing nitrogen:EP,0240136 A1[P].1987.
[4]Mills G A,Boedeker E R,Oblad A G.Chemical characterization of catalysts poisoning of cracking catalysts by nitrogen compounds and potassium ion[J].Journal of the American Chemical Society,2002,72(4):1554-1560.
[5]方向晨,王家寰,戴承远.炼油工业技术知识丛书:加氢精制[M].北京:中国石化出版社,2012:38-46.
[6]Rollmann L D.Catalytic hydrogenation of model nitrogen,sulfur,and oxygen compounds[J].Journal of Catalysis,1977,46(3):243-252.
[7]李立权.加氢裂化装置工艺计算与技术分析[M].北京:中国石化出版社,2009:185-190.
[8]Nguyen M T,Tayakoutfayolle M,Pirngruber G D,et al.Kinetic modeling of quinoline hydrodenitrogenation over a nimo(p)/Al2O3catalyst in a batch reactor[J].Ind Eng Chem Res,2015,54(38):9278-9288.
[9]Shao M,Cui H,Guo S,et al.Effects of calcination and reduction temperature on the properties of Ni-P/Si O2and Ni-P/Al2O3and their hydrodenitrogenation performance[J].RSC Advances,2018,8(13):6745-6751.
[10]Wu S,Liu G,Yu Z,et al.Optimization of hydrogen networks with constraints on hydrogen concentration and pure hydrogen load considered[J].Chemical Engineering Research&Design,2012,90(9):1208-1220.
[11]陈钟秀,顾飞燕,胡望明.化工热力学[M].3版.北京:化学工业出版社,2012:247-261.
[2]Ali M A.Investigation of nitrogen compound types in high-boiling petroleum distillates from saudi arabian crude oils[J].Food Science&Technology International,1987,6(3):259-290.
[3]Scherzer J.Process for the catalytic cracking of feedstocks containing nitrogen:EP,0240136 A1[P].1987.
[4]Mills G A,Boedeker E R,Oblad A G.Chemical characterization of catalysts poisoning of cracking catalysts by nitrogen compounds and potassium ion[J].Journal of the American Chemical Society,2002,72(4):1554-1560.
[5]方向晨,王家寰,戴承远.炼油工业技术知识丛书:加氢精制[M].北京:中国石化出版社,2012:38-46.
[6]Rollmann L D.Catalytic hydrogenation of model nitrogen,sulfur,and oxygen compounds[J].Journal of Catalysis,1977,46(3):243-252.
[7]李立权.加氢裂化装置工艺计算与技术分析[M].北京:中国石化出版社,2009:185-190.
[8]Nguyen M T,Tayakoutfayolle M,Pirngruber G D,et al.Kinetic modeling of quinoline hydrodenitrogenation over a nimo(p)/Al2O3catalyst in a batch reactor[J].Ind Eng Chem Res,2015,54(38):9278-9288.
[9]Shao M,Cui H,Guo S,et al.Effects of calcination and reduction temperature on the properties of Ni-P/Si O2and Ni-P/Al2O3and their hydrodenitrogenation performance[J].RSC Advances,2018,8(13):6745-6751.
[10]Wu S,Liu G,Yu Z,et al.Optimization of hydrogen networks with constraints on hydrogen concentration and pure hydrogen load considered[J].Chemical Engineering Research&Design,2012,90(9):1208-1220.
[11]陈钟秀,顾飞燕,胡望明.化工热力学[M].3版.北京:化学工业出版社,2012:247-261.