降凝剂对原油中蜡非等温结晶行为的影响
|
摘要
以乙烯-醋酸乙烯酯共聚物(EVA)和聚丙烯酸高碳醇酯(PA)为主要原料,制备了一种高凝原油降凝剂(PAEVA),采用差示扫描量热法研究了降凝剂的添加对原油中蜡的非等温结晶动力学的影响。结果表明:PA-EVA降凝剂起到了异相成核作用,使蜡的结晶峰温升高,结晶速率增大;PA-EVA降凝剂通过增大蜡晶几何尺寸,减少了对液态油的包覆,从而改善原油的流动性。
A pour point depressant(PA-EVA)was prepared by using ethylene-vinyl acetate copolymer(EVA)and higher alcohol polyacrylate(PA)as raw materials.Its effect and mechanism on Nanyang crude oil were studied.The effect of pour point depressant on non-isothermal crystallization behavior of wax was investigated by differential scanning calorimetry(DSC).Results showed that the nucleation of PA-EVA increases the peak crystallization temperature and enhances the crystallization rate of the wax.PA-EVA improves the flow ability of crude oil by increasing the wax crystal geometry size,reducing the coating of liquid oil.
A pour point depressant(PA-EVA)was prepared by using ethylene-vinyl acetate copolymer(EVA)and higher alcohol polyacrylate(PA)as raw materials.Its effect and mechanism on Nanyang crude oil were studied.The effect of pour point depressant on non-isothermal crystallization behavior of wax was investigated by differential scanning calorimetry(DSC).Results showed that the nucleation of PA-EVA increases the peak crystallization temperature and enhances the crystallization rate of the wax.PA-EVA improves the flow ability of crude oil by increasing the wax crystal geometry size,reducing the coating of liquid oil.
引文
[1]Visintin R,Lapasin R,Vignati E,et al.Rheological behavior and structural interpretation of waxy crude oil gels[J].Langmuir,2005,21(14):6240-6249
[2]Oyekunle L,Adeyanju O.Thermodynamic prediction of paraffin wax precipitation in crude oil pipelines[J].Petroleum Science and Technology,2011,29:208-217
[3]Hoteit H,Banki R,Firoozabadi A.Wax deposition and aging in flowlines from irreversible thermodynamics[J].Energy Fuels,2008,22(4):2693-2706
[4]代晓东,贾子麒,李国平,等.原油降凝剂作用机理及其研究进展[J].油气储运,2011,30(2):86-89
[5]张志庆,刘春鸣,刘梦雨,等.高蜡原油降凝剂的合成与评价[J].胶体与聚合物,2014,32(3):125-128
[6]张拂晓,方龙,聂兆广,等.高凝原油降凝剂的制备及其降凝机理[J].石油学报(石油加工),2009,25(6):801-806
[7]齐力,林云青,王佛松.高聚物非等温结晶动力学[J].化学研究与应用,1995,7(2):111-117
[8]蒋庆哲,岳国,宋昭峥,等.乙烯-醋酸乙烯酯的结构与降凝性能的关系[J].西南石油学院学报,2006,28(2):71-74
[9]孙伟,李耀刚,王志远,等.聚丙烯酸高碳醇酯原油降凝剂的结晶特性[J].油气储运,2011,29(11):861-863
[10]马传国,苗海卿,汪鸿,等.氢化棉籽油非等温结晶动力学研究[J].河南工业大学学报(自然科学版),2013,34(1):12-16
[11]陈五花.降凝剂对含蜡原油析出过程影响的实验与模型化研究[D].大连:大连大连理工大学,2009
[12]莫志深.一种研究聚合物非等温结晶动力学的方法[J].高分子学报,2008(7):656-661
[13]张志英,朱兆付.Avrami结晶动力学理论在非等温条例下的应用[J].高分子材料科学与工程,1994(6):80-84
[14]Ozawa T.Kinetics of non-isothermal crystallization[J].Polymer,1971,12(1):150-157
[15]刘晓燕,王露,崔晓琳,等.基线选取对DSC法测试原油含蜡量的影响[J].油气储运,2017,36(7):795-799
[2]Oyekunle L,Adeyanju O.Thermodynamic prediction of paraffin wax precipitation in crude oil pipelines[J].Petroleum Science and Technology,2011,29:208-217
[3]Hoteit H,Banki R,Firoozabadi A.Wax deposition and aging in flowlines from irreversible thermodynamics[J].Energy Fuels,2008,22(4):2693-2706
[4]代晓东,贾子麒,李国平,等.原油降凝剂作用机理及其研究进展[J].油气储运,2011,30(2):86-89
[5]张志庆,刘春鸣,刘梦雨,等.高蜡原油降凝剂的合成与评价[J].胶体与聚合物,2014,32(3):125-128
[6]张拂晓,方龙,聂兆广,等.高凝原油降凝剂的制备及其降凝机理[J].石油学报(石油加工),2009,25(6):801-806
[7]齐力,林云青,王佛松.高聚物非等温结晶动力学[J].化学研究与应用,1995,7(2):111-117
[8]蒋庆哲,岳国,宋昭峥,等.乙烯-醋酸乙烯酯的结构与降凝性能的关系[J].西南石油学院学报,2006,28(2):71-74
[9]孙伟,李耀刚,王志远,等.聚丙烯酸高碳醇酯原油降凝剂的结晶特性[J].油气储运,2011,29(11):861-863
[10]马传国,苗海卿,汪鸿,等.氢化棉籽油非等温结晶动力学研究[J].河南工业大学学报(自然科学版),2013,34(1):12-16
[11]陈五花.降凝剂对含蜡原油析出过程影响的实验与模型化研究[D].大连:大连大连理工大学,2009
[12]莫志深.一种研究聚合物非等温结晶动力学的方法[J].高分子学报,2008(7):656-661
[13]张志英,朱兆付.Avrami结晶动力学理论在非等温条例下的应用[J].高分子材料科学与工程,1994(6):80-84
[14]Ozawa T.Kinetics of non-isothermal crystallization[J].Polymer,1971,12(1):150-157
[15]刘晓燕,王露,崔晓琳,等.基线选取对DSC法测试原油含蜡量的影响[J].油气储运,2017,36(7):795-799