GO/鼠李糖脂复配体系下CO_(2)水合物生成实验及逸度模型研究  

Experimental Study and Fugacity Model CO_(2) on Hydrate Formation Promoted by Graphene Oxide Compounded with Rhamnolipid

作　　者：饶永超 王树立 黄俊尧 李立军 赵书华 周诗岽 RAO Yongchao;WANG Shuli;HUANG Junyao;LI Lijun;ZHAO Shuhua;ZHOU Shidong(School of Petroleum Engineering,Changzhou University,Changzhou 213164,Jiangsu,China;School of Energy,Quanzhou Polytechnic University,Quanzhou 362268,Fujian,China;Jiangsu Oilfield Company,Sinopec,Yangzhou 225009,Jiangsu,China)

机构地区：[1]常州大学石油工程学院,江苏常州213164 [2]泉州职业技术大学能源学院,福建泉州362268 [3]中国石化集团江苏油田分公司,江苏扬州225009

出　　处：《实验室研究与探索》2022年第11期6-12,共7页Research and Exploration In Laboratory

基　　金：国家自然科学基金项目(51974037,51574045);中石油科技创新基金(2020D-5007-0211);江苏省高等学校基础科学研究面上项目(22KJB440002);常州市应用基础研究项目(CJ20200085);泉州市社发和农业领域科技计划项目(2022 N00407);江苏省油气储运技术重点实验室开放课题(CDYQCY2021005、CDYQCY2021001)。

摘　　要：在277.15~281.15 K和4~5 MPa工况内进行了氧化石墨烯(GO)与鼠李糖脂复配体系下CO_(2)水合物生成特性实验,建立了该体系下CO_(2)水合物生成的逸度模型,以Matlab进行了程序设计和计算,并与实验结果进行了比较。结果表明,在GO与鼠李糖脂复配体系下,CO_(2)水合物生成速度增大,相平衡压力降低,诱导时间和生成时间缩短,耗气量增大。最佳复配浓度为0.005%GO+0.05%鼠李糖脂,与纯水0.005%GO体系相比,水合物的生成时间分别缩短60.36%和39.18%,相平衡压力降低18.9%和12.7%,耗气量提高13.35%和4.04%。以逸度模型为基础结合改进的PR状态方程,采用UNIFAC基团贡献法测定各组分活度,并根据促进剂对饱和蒸气压、摩尔体积等相关参数的影响进行修正。The experiments of the CO_(2)hydrate formation were performed at 277.15-281.15 K and 4-5 MPa in the systems with GO and rhamnolipid.The fugacity model was developed and applied to CO_(2)hydrate formation kinetics in the systems with additives.From the view of fugacity model,the effects of concentrations of GO compounded with rhamnolipid,temperature and pressure on the model parameters were detailed analyzed.The Matlab was used to calculate the model and compare with the experimental results.Experimental results show that GO and rhamnolipid play a great role in enhancing CO_(2)hydrate formation.The rate of CO_(2)hydrate formation is accelerated,the phase equilibrium pressure is reduced,the induction time and generation time are shortened,and the gas consumption is increased.The optimal concentration is 0.005%GO+0.05%rhamnolipid,and the formation times are shorten by 60.36%and 39.18%,and equilibrium pressures are decreased by 18.9%and 12.7%,and the gas consumption are enlarged by 13.35%and 4.04%,respectively,compared with the pure water and 0.005%GO system.

关 键 词：氧化石墨烯 鼠李糖脂 水合物 生成机理 逸度模型 

分 类 号：TQ0795[化学工程]