化工学报 ›› 2019, Vol. 70 ›› Issue (S1): 61-68.DOI: 10.11949/j.issn.0438-1157.20181401

• 流体力学与传递现象 • 上一篇    下一篇

多苯环双子季铵盐在油水两相中的传质性能

张光华(),董秋辰(),刘晶   

  1. 陕西科技大学陕西省轻化工助剂重点实验室,陕西 西安 710021
  • 收稿日期:2018-11-22 修回日期:2019-01-21 出版日期:2019-03-31 发布日期:2019-03-31
  • 通讯作者: 董秋辰
  • 作者简介:<named-content content-type="corresp-name">张光华</named-content>(1962—),男,博士,教授,<email>zhanggh@sust.edu.cn</email>|董秋辰(1995—),男,硕士研究生,<email>1069813711@qq.com</email>
  • 基金资助:
    陕西省教育厅重点实验室科研计划项目(14JS015)

Two-phase mass transfer of multi-benzene gemini quaternary ammonium salt in oil-water

Guanghua ZHANG(),Qiuchen DONG(),Jing LIU   

  1. Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi’an 710021, Shaanxi, China
  • Received:2018-11-22 Revised:2019-01-21 Online:2019-03-31 Published:2019-03-31
  • Contact: Qiuchen DONG

摘要:

采用紫外分光光度法测定了2种联结基不同的阳离子双子季铵盐缓蚀剂(bi-PDTBP和PDTBP)在油水两相中的分配系数,通过分配系数及有关理论,计算出2种阳离子双子季铵盐缓蚀剂在分配时的热力学参数,并系统考察了温度、油水比例、盐浓度、缓蚀剂浓度和时间对缓蚀剂在油水介质中迁移的影响;最后通过失重法研究了2种缓蚀剂在1 mol/L盐酸中对Q235钢的缓蚀性能。结果表明:温度和缓蚀剂浓度可促进缓蚀剂在油水介质中的分配,而盐浓度和油水比例会阻碍缓蚀剂在油水介质中的分配;另外,随着2种缓蚀剂浓度的增加,缓蚀效率逐渐提高,且bi-PDTBP在高温下的缓蚀性能优于PDTBP。

关键词: 传质, 界面, 腐蚀, 分配系数, 缓蚀剂

Abstract:

Distribution coefficients of two kinds of cationic gemini quaternary ammonium salt corrosion inhibitors (bi-PDTBP and PDTBP) between water and oil were measured by ultraviolet spectrophotometry, from which thermodynamic parameters were calculated. Effects of temperature, oil-water ratio, salt content, inhibitor concentration and time on the mass transfer between water and oil were systematically investigated. Finally, the corrosion inhibition performance of two corrosion inhibitors for Q235 steel in 1 mol/L hydrochloric acid was studied by weight loss experiments. Results showed that temperature and inhibitor concentration can promote the mass transfer of corrosion inhibitors between oil-water two phases, while oil-water ratio and salt concentration can hinder the mass transfer of corrosion inhibitors between oil-water two phases. The mass transfer process is spontaneous and endothermic reaction accompanied by an increase in entropy. In addition, as the concentration of two inhibitors increases, the corrosion inhibition efficiency increases gradually, and bi-PDTBP showed greater corrosion inhibition effect than PDTBP at high temperature.

Key words: mass transfer, interface, corrosion, distribution coefficient, inhibitor

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