基于反气相色谱技术研究原油表面性质

胡定凯; 马国锐; 徐燕东; 王强

doi:10.13568/j.cnki.651094.651316.2020.10.31.0001

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基于反气相色谱技术研究原油表面性质

化学与化工 | 更新时间：2026-01-21

- 基于反气相色谱技术研究原油表面性质
- 基于反气相色谱技术研究原油表面性质
- 新疆大学学报（自然科学版中英文） 2021年38卷第4期页码：431-438
- 作者机构：
  
  1. 新疆大学化工学院煤炭清洁转化与化工过程新疆重点实验室
  2. 中国石化西北油田分公司石油工程技术研究院
- 作者简介：
- 基金信息：
  
  国家重大专项(2016ZX05053);中石化重大专项(ZDP17004)
- DOI：10.13568/j.cnki.651094.651316.2020.10.31.0001
  中图分类号： O657.71;TE622
- 纸质出版：2021
- 稿件说明：
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[1]胡定凯,马国锐,徐燕东,等.基于反气相色谱技术研究原油表面性质[J].新疆大学学报(自然科学版)(中英文),2021,38(04):431-438.
[1]胡定凯,马国锐,徐燕东,等.基于反气相色谱技术研究原油表面性质[J].新疆大学学报(自然科学版)(中英文),2021,38(04):431-438. DOI： 10.13568/j.cnki.651094.651316.2020.10.31.0001.

DOI：10.13568/j.cnki.651094.651316.2020.10.31.0001.

摘要

在温度333.15 K~373.15 K条件下

采用反气相色谱技术表征了原油表面性质

探究了原油表面的探针保留行为和吸附焓?Ha~s.分别采用Schultz和Dorris-Gray法得到了原油表面色散自由能(γl~d)

并获得其表面Lewis酸碱常数.结果表明:在实验温度范围内

原油表面色散自由能的值随温度升高而呈线性增大.原油表面Lewis酸常数(KA)为0.35

碱常数(KB)为2.70

酸碱常数综合表现KB/KA=7.71

其表面整体呈现两性偏碱性特点.研究结果可为原油界面相研究提供参考.

Abstract

Inverse gas chromatography was used to study surface properties of crude oil at 333.15 K~373.15 K. Probe retention behavior and adsorption enthalpy(?Ha~s) of crude oil surface were investigated based on net retention volume(Vn). Schultz method and Dorris-Gray method were used to calculate dispersive component of surface energy(γs~d) of crude oil

and the acid-base parameters on the surface of crude oil were also calculated.The results indicate that the probes were all exothermic adsorption on the surface of crude oil

and the adsorption enthalpy ranged from 53 to 90 kJ·mol-1. γsdincreased linearly with the increase of temperature in the experimental temperature range

and was calculated by Dorris-Gray method is slightly higher than the Schultz method. The characteristic adsorption free energy( ?Gsap)and characteristic adsorption enthalpy(?Hasp) of the polar probe are calculated

and the Lewis acid constant(KA) is 0.35

the base constant(KB) is 2.70

KB/KA= 7.71

suggesting that the surfaces of crude oil was considered as amphoteric with a predominantly basic character. It is confirmed that IGC was useful for surface characterization and can provide reference for the research of crude oil interfacial phase.

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references

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