Process simulation and optimization of recycling C2 from refinery gas

doi:10.11949/j.issn.0438-1157.20160321

Abstract

Abstract:

Recovery of ethylene, an important raw chemical material, from refinery gas can effectively reduce production cost and improve profit of refineries. A new hybrid hydration and absorption process for recycling ethylene from refinery gas was designed and optimized by using Aspen Custom Modeler. Conditions at various efficiencies of ethylene recovery were optimized through operational parameters, such as oil flow rate, theoretical plate numbers, water content and temperature.

Key words: refinery gas, hydrate, absorption, simulation, optimization

摘要：

乙烯是一种重要的化工原料，从催化干气中回收乙烯，能有效地降低我国炼油厂的生成成本，提高其经济效益。采用水合物-吸收耦合新工艺，对催化干气中C2组分进行回收。应用Aspen Custom Modeler模拟软件，对该工艺流程进行了设计和模拟优化。通过对乳液用量、理论板数、水含量、操作温度等参数进行优化，得到了不同乙烯回收率下的最优操作条件。

关键词: 催化干气, 水合物, 吸收, 模拟, 优化

CLC Number:

TQ07

LIU Jingjing, LI Xingang. Process simulation and optimization of recycling C2 from refinery gas[J]. CIESC Journal, 2016, 67(8): 3476-3480.

刘晶晶, 李鑫钢. 从催化干气中回收C2的工艺模拟与优化[J]. 化工学报, 2016, 67(8): 3476-3480.

References 20

[1]	张勇.烯烃技术进展[M].北京:中国石化出版社,2008:251-252.ZHANG Y.Technical Progress Olefins[M].Beijing:China Petrochemical Press,2008:251-252.
[2]	陈平.轻烃资源优化及其经济效益分析[J].化工技术经济,2003,21(6):10-12.DOI:10.3969/j.issn.1673-9647.2003.06.003.CHEN P.Optimization of light hydrocarbon resources and its economical analysis[J].Chemical Techno-Economics,2003,21(6):10-12.DOI:10.3969/j.issn.1673-9647.2003.06.003.
[3]	吴茨萍,孙利.炼厂干气的分离回收和综合利用[J].现代化工,2001,21(5):20-23.DOI:10.3321/j.issn:0253-4320.2001.05.006.WU C P,SUN L.Separation and comprehensive utilization of refinery dry gas[J].Modern Chemical Industry,2001,21(5):20-23.DOI:10.3321/j.issn:0253-4320.2001.05.006.
[4]	ELDRIDGE R B.Olefin/paraffin separation technology:a review[J].Ind.End.Chem.Res.,1993,32(10):2208-2212.DOI:10.1021/ie00022a002.
[5]	张礼昌,李东风,杨元一.炼厂干气中乙烯回收和利用技术进展[J].石油化工,2012,41(1):103-110.DOI:10.3969/j.issn.1000-8144.2012.01.020.ZHANG L C,LI D F,YANG Y Y.Progress in recovery and utilization techniques of ethylene in refinery off-gas[J].Petrochemical Technology,2012,41(1):103-110.DOI:10.3969/j.issn.1000-8144.2012.01.020.
[6]	王勇.空气分离整体工艺流程模拟及优化[D].天津:天津大学,2012.WANG Y.Air separation process simulation and optimization[D].Tianjin:Tianjin University,2012.
[7]	叶鹏程,方兆华,任其龙.从炼油厂干气中分离烯烃的技术[J].石油学报(石油加工),2010,26(4):642-647.DOI:10.3969/j.issn.1001-8719.2010.04.027.YE P C,FANG Z H,REN Q L.Technologies of separating alkene from refinery dry gas[J].Acta Petrolei Sinica (Petroleum Processing Section),2010,26(4):642-647.DOI:10.3969/j.issn.1001-8719.2010.04.027.
[8]	曹映玉,杨恩翠,王文举.二氧化碳膜分离技术[J].精细石油化工,2015,32(1):53-60.DOI:10.3969/j.issn.1003-9384.2015.01.013.CAO Y Y,YANG E C,WANG W J.Membranes for carbon dioxide separation[J].Speciality Petrochemicals,2015,32(1):53-60.DOI:10.3969/j.issn.1003-9384.2015.01.013.
[9]	FALLANZA M,ORTIZ A,GORRI D,et al.Experimental study of the separation of propane/propylene mixtures by supported ionic liquid membranes containing Ag+-RTILs as carrier[J].Separation and Purification Technology,2012,97:83-89.DOI:10.1016/j.seppur.2012.01.044.
[10]	KONDO W,OHTSUKA K,OHMURA R,et al.Clathrate-hydrate formation from a hydrocarbon gas mixture:compositional evolution of formed hydrate during an isobaric semi-batch hydrate-forming operation[J].Applied Energy,2014,113:864-871.DOI:10.1016/j.apenergy.2013.08.033.
[11]	TOMITA S,AKATSU S,OHMURA R.Experiments and thermodynamic simulations for continuous separation of CO2 from CH4 CO2 gas mixture utilizing hydrate formation[J].Applied Energy,2015,146:104-110.DOI:10.1016/j.apenergy.2015.01.088.
[12]	LUO X,WANG M,LI X,et al.Modelling and process analysis of hybrid hydration-absorption column for ethylene recovery from refinery dry gas[J].Fuel,2015,158:424-434.DOI:10.1016/j.fuel.2015.05.035.
[13]	LI X G,LI Y,ZHANG L H,et al.Absorption-hydration hybrid method for ethylene recovery from refinery dry gas:simulation and evaluation[J].Chemical Engineering Research and Design,2016.DOI:10.1016/j.cherd.2016.01.022.
[14]	LI Y,LI X G,LI H,et al.Modeling and simulation of a multistage absorption hydration hybrid process using equation oriented modeling environment[J].Computers&Chemical Engineering,2016,86:160-170.DOI:10.1016/j.compchemeng.2015.12.021.
[15]	刘新新.催化干气中轻烃和氢气的回收工艺及参数优化[D].青岛:青岛科技大学,2015.LIU X X.The recovery process and parameter optimization of light hydrocarbon and hydrogen in the refinery gas[D].Qingdao:Qingdao University of Science and Technology,2015.
[16]	PENG D Y,ROBINSON D B.A new two-constant equation of state[J].Ind.Eng.Chem.Fundam.,1976,15(1):59-64.DOI:10.1021/i160057a011.
[17]	CHEN G J,GUO T M.Thermodynamic modeling of hydrate formation based on new concepts[J].Fluid Phase Equilib.,1996,122(1/2):43-65.DOI:10.1016/0378-3812(96)03032-4.
[18]	CHEN G J,GUO T M.A new approach to gas hydrate modeling[J].Chem.Eng.J.,1998,71(2):145-51.DOI:10.1016/S1385-8947(98)00126-0.
[19]	WANG X H,QIN H B,DANDEKAR A,et al.Hydrate phase equilibrium of H2/CH4/CO2 ternary gas mixtures and cage occupancy percentage of hydrogen molecules[J].Fluid Phase Equilibria,2015,403(15):160-166.DOI:10.1016/j.fluid.2015.06.020.
[20]	MA Q L,CHEN G J,SUN C Y.Vapor-liquid-liquid-hydrate phase equilibrium calculation for multicomponent systems containing hydrogen[J].Fluid Phase Equilibria,2013,338:87-94.DOI:10.1016/j.fluid.2012.11.002.