化工进展 ›› 2020, Vol. 39 ›› Issue (3): 966-974.doi: 10.16085/j.issn.1000-6613.2019-1070

• 能源加工与技术 • 上一篇    下一篇

基于化学亲和力模型的水合物生成动力学

王树立1(),黄俊尧1,闫朔2,饶永超1(),贾茹1,刘滨2   

  1. 1.常州大学石油工程学院,江苏 常州 213016
    2.中国石化集团管道储运公司,江苏 徐州 221000
  • 收稿日期:2019-07-08 出版日期:2020-03-05 发布日期:2020-04-03
  • 通讯作者: 饶永超 E-mail:wsl@cczu.edu.cn;ryc@cczu.edu.cn
  • 作者简介:王树立(1957—),男,教授,研究方向为气体水合物理论与应用。E-mail:wsl@cczu.edu.cn
  • 基金资助:
    国家自然科学基金(51574045)

Hydrate formation kinetics based on chemical affinity model

Shuli WANG1(),Junyao HUANG1,Shuo YAN2,Yongchao RAO1(),Ru JIA1,Bin LIU2   

  1. 1.School of Petroleum Engineering, Changzhou University, Changzhou 213016, Jiangsu, China
    2.Pipeline Transportation and Storage Company, Sinopec, Xuzhou 221000, Jiangsu, China
  • Received:2019-07-08 Online:2020-03-05 Published:2020-04-03
  • Contact: Yongchao RAO E-mail:wsl@cczu.edu.cn;ryc@cczu.edu.cn

摘要:

水合物生成促进及动力学模型是水合物利用技术的关键问题。本文回顾了水合物生成促进技术的发展,实验研究了氧化石墨烯(GO)与十二烷基硫酸钠(SDS)复配促进剂体系下CO2水合物的生成动力学,揭示了不同浓度对水合物生成时间、耗气的影响规律。研究结果表明,在GO与SDS复配体系下,CO2水合物生成速度加快,诱导时间和生成时间缩短,耗气量增大。得出最佳复配浓度为0.005%GO+0.2%SDS,与纯水和单一0.005%GO体系相比,水合物的生成时间分别缩短69.7%和12.2%,耗气量提高11.24%和3.2%。建立了该体系下CO2水合物生成化学亲和力模型,并从模型角度研究了GO与SDS复配比例、温度和压力对化学亲和力模型参数的影响。利用Matlab对模型编程计算并与实验结果进行了对比分析,吻合很好。通过研究认为,化学亲和力模型可准确预测复配体系水合物的生成。

关键词: 氧化石墨烯, 十二烷基硫酸钠, 水合物, 化学亲和力模型, 生成动力学

Abstract:

Hydrate generation promotion and kinetic model is key issues in hydrate utilization technology. The formation kinetics of CO2 hydrate in graphene oxide (GO) and sodium dodecyl sulfate (SDS) compounding accelerator system was studied experimentally, and the influence of different concentrations on hydrate formation time and gas consumption was revealed. The results showed that under the combination of GO and SDS, the formation rate of CO2 hydrate was accelerated, the induction time and generation time were shortened, and the gas consumption was increased. The optimal compounding concentration was 0.005% GO and 0.2% SDS. Compared with pure water and a single 0.005% GO system, the hydrate formation time was shortened by 69.7% and 12.2%, respectively, and the gas consumption was increased by 11.24% and 3.2%. The chemical affinity model of CO2 hydrate formation in this system was established. The effects of GO and SDS compound ratio, temperature and pressure on the chemical affinity model parameters were studied from the model point of view. Using Matlab to program the model and comparing it with the experimental results, the agreement was very good. The results showed the chemical affinity model could accurately predict the formation of hydrates in the complex system.

Key words: GO, SDS, hydrate, chemical affinity model, formation kinetics

中图分类号: 

  • TQ 0795