文献类型：期刊文献

中文题名：高吸附容量吡啶基聚合物刷脱除原油中金属的机理研究

英文题名：Study on Crude Oil Metal Removal Mechanism of Pyridine Polymer Brush With High Absorption Capacity

作者：耿桐[1];许军[1];任满年[2];曹发海[1]

机构：[1]华东理工大学大型工业反应器工程教育部工程研究中心,上海200237;[2]中国石化洛阳分公司,河南洛阳471012

年份：2021

卷号：37

期号：3

起止页码：530

中文期刊名：石油学报（石油加工）

外文期刊名：Acta Petrolei Sinica(Petroleum Processing Section)

收录：CSTPCD;;EI(收录号：20212210420470);Scopus;北大核心:【北大核心2020】；CSCD:【CSCD_E2021_2022】；

基金：国家自然科学基金项目(21878098)资助。

语种：中文

中文关键词：原油;脱镍;脱钙;吡啶;聚合物刷;电脱盐

外文关键词：crude oil;Ni removal;Ca removal;polymer brush;pyridine;electric desalting

摘要：通过硅烷偶联和自由基聚合反应,合成了以SiO 2为核、聚4-乙烯基吡啶(P4VP)为壳的聚合物刷(P4VP@SiO 2)。采用红外光谱(FT-IR)、热重分析(TGA)、透射电镜(TEM)和扫描电镜(SEM)等手段对P4VP@SiO 2的结构进行了表征。将P4VP@SiO 2用于脱除原油中的镍和钙,分析了电脱盐工艺条件对其原油脱镍率和脱钙率的影响,并考察了P4VP@SiO 2的再生性能,提出了聚合物刷的脱金属机理。结果表明:随着P4VP@SiO 2加入量和沉降时间的增加,P4VP@SiO 2对原油的脱镍率和脱钙率先升高后趋于稳定;随着水/油质量比、乳化剪切强度、电脱盐温度和电场强度的增加,P4VP@SiO 2对原油的脱镍率和脱钙率先升高后降低。当P4VP@SiO 2用量为6000μg/g、水/油质量比为0.15、电脱盐温度为120℃、乳化剪切强度为8 kr/min、电脱盐低压电场强度为500 V/cm、高压电场强度为1000 V/cm、沉降时间为60 min时,P4VP@SiO 2对原油的脱镍率和脱钙率分别达到68.4%和62.2%。此外,经过5次电脱盐循环使用过程,P4VP@SiO 2对原油中镍和钙均保持了初始脱除能力的95%。因此,吡啶基聚合物刷是一种应用前景广阔、对镍和钙具有高吸附容量的非酸性和可再生原油脱金属剂。
Through silane coupling and free radical polymerization,using SiO 2 as core and poly4-vinylpyridine(P4VP)as shell,polymer brush with core-shell structure(P4VP@SiO 2)was designed and synthesized.The structure of P4VP@SiO 2 was further characterized by Fourier transform-infrared spectrometer(FT-IR),thermogravimetric analysis(TGA),scanning electron microscope(SEM)and transmission electron microscope(TEM).Impacts of electric desalination process conditions on nickel and calcium removal ratio were investigated.P4VP@SiO 2 regeneration was also studied,and polymer brush metal removal mechanism from crude oils was further proposed.It was found,with P4VP@SiO 2 concentration and settling time increase,nickel and calcium removal ratios increase in the beginning and then can be stabilized.However,with the increase of water/oil mass ratio,mixing intensity,electric desalination temperature and electric field strength,nickel and calcium removal ratios increase in the beginning,but then decrease if the above parameters continue to be increased.Experimental results show that,under the conditions of P4VP@SiO 26000μg/g,water/oil mass ratio 0.15,emulsified shear intensity 8 kr/min,electric desalination temperature 120℃,low-voltage field strength of electric desalting 500 V/cm,high-voltage field strength 1000 V/cm and settling time 60 min,nickel and calcium removal ratios can be as high as 68.4%and 62.2%,respectively.Especially,after five times electric desalination-desorption recycle processes,P4VP@SiO 2 can still demonstrate still very stable property and maintain 95%nickel and calcium removal ratio.The above experimental results indicate that P4VP@SiO 2 is a non-acidic,recyclable,economic crude oil demetallizing agent with high nickel and calcium absorption capacity.