石油学报(石油加工) ›› 2021, Vol. 37 ›› Issue (1): 1-9.doi: 10.3969/j.issn.1001-8719.2021.01.001

• 研究报告 •    下一篇

丙烯酸聚合物刷脱除原油中卟啉镍的实验研究

刘思源1,耿桐1,许军1,任满年2,曹发海1   

  1. 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
  • 收稿日期:2020-01-19 修回日期:2020-04-15 出版日期:2021-01-25 发布日期:2021-01-12
  • 通讯作者: 曹发海,男,教授,博士,从事化学工程与工艺方面研究,Tel:021-64252874, E-mail: fhcao@ecust.edu.cn E-mail:fhcao@ecust.edu.cn
  • 作者简介:第一作者:刘思源,女,硕士研究生,从事原油脱金属方面研究
  • 基金资助:
    国家自然科学基金资助项目(21878098)资助

Experimental Study of Polyacrylic Acid Brush Removal of Nickel Porphyrin From Crude Oil

LIU Siyuan1, GENG Tong1, XU Jun1, REN Mannian2, CAO Fahai1   

  1. 1. Large Industrial Reactor Engineering, Research Center of the Ministry of Education, East China University of Science and Technology, Shanghai 200237, China;
    2. SINOPEC Luoyang Company, Luoyang 471012, China
  • Received:2020-01-19 Revised:2020-04-15 Online:2021-01-25 Published:2021-01-12

摘要: 为探寻高效、无腐蚀的原油脱镍剂,以SiO2为核、聚丙烯酸(PAA)为壳,利用自由基调聚法,合成具有核-壳结构的聚合物刷(PAA@SiO2)。通过红外光谱、热重分析和扫描电镜对PAA@SiO2进行了表征,并结合电脱盐工艺考察了PAA@SiO2对原油中卟啉镍的脱除效果,分析了原油中卟啉镍的脱除机理。结果显示:合成的PAA@SiO2中PAA的接枝质量分数和摩尔质量分别达到7.03%和351.5 g/mol;当PAA@SiO2脱镍剂用量为6000μg/g、水/油质量比为0.08、电脱盐温度为125 ℃、电脱盐低压场强为600 V/cm、高压场强为1200 V/cm时,3次连续脱镍实验后的原油脱镍率高达89.9%。因此,核-壳结构的PAA@SiO2聚合物刷可有效脱除原油中的金属镍,为原油脱金属剂的结构设计提供了新思路。

关键词: 原油, 脱镍, 聚合物刷, 聚丙烯酸, 电脱盐

Abstract: To efficiently remove Ni from crude oils and also without corrosion occurring in the process, polymer brush with core-shell structure (PAA@SiO2) was synthesized by radical polymerization, in which micro-sized SiO2 as the core and polyacrylic acid as the shell. The synthesized materials were further characterized with Fourier transform-infrared spectrometer, thermogravimetric analysis and scanning electron microscope. Effect of PAA@SiO2 on Ni porphyrin removal was studied and Ni removal mechanism was discussed. Experimental results suggested that, for the synthesized PAA@SiO2, the grafting mass fraction and calculated molecular mass of PAA are 7.03% and 351.5 g/mol, respectively. Under the conditions of PAA@SiO2 doses is 6000μg/g, water/oil mass ratio is 0.08, electric desalting temperature is 125 ℃, low-voltage field strength is 600 V/cm and high-voltage field strength is 1200 V/cm, Ni removal ratio can be 89.9% after three times continuous removal processes. Experimental study indicates that PAA@SiO2 with core-shell structure can effectively remove Ni from crude oils. Thus this study provides a different strategy for new materials which can be used as crude oil demetalization.

Key words: crude oil, Ni removal, polymer brush, polyacrylic acid, electric desalting