纤维素纳米晶对甲烷水合物生成影响  

Effect of cellulose nanocrystals on methane hydrate formation

作　　者：蒋元立 周莉[2] 潘振[3] JIANG Yuan-li;ZHOU Li;PAN Zhen(College of Environmental and Safety Engineering,Liaoning Shihua University,Fushun 113001,Liaoning Province,China;College of Petrochemical Engineering,Liaoning Shihua University,Fushun 113001,Liaoning Province,China;College of Petroleum Engineering,Liaoning Shihua University,Fushun 113001,Liaoning Province,China)

机构地区：[1]辽宁石油化工大学环境与安全工程学院,辽宁抚顺113001 [2]辽宁石油化工大学石油化工学院,辽宁抚顺113001 [3]辽宁石油化工大学石油天然气工程学院,辽宁抚顺113001

出　　处：《化学工程》2021年第4期58-62,共5页Chemical Engineering(China)

基　　金：辽宁省博士科研启动基金项目资助(2019-BS-159);辽宁省教育厅重点攻关项目资助(L2020002)。

摘　　要：油气管道输送过程中水合物的防治已成为流动安全保障技术的关键课题。文中研究了纳米晶纤维素(CNC)对甲烷气体水化浆体宏观结构的影响,测量了在5 MPa的初始压力和274.2 K的初始温度下,10 h内的动力学参数的变化。将水合物聚结现象与生成机理结合,对新生成水合物浆液进行动力学分析,同时从化学结构的角度研究了相变体系出现孔隙结构的变化。结果表明,在0.1%-0.3%质量分数范围内,颗粒质量分数每升高0.1%,诱导时间分别延长了17 min和74 min,最高延长了188%。CNC存在时,水合物浆体内存在大量球状孔隙,使Ⅰ型水合物的生成具有网状结构。这些变化与反应时间内测量的诱导时间变化相对应。The prevention and control of hydrates in the process of oil and gas pipeline transportation has become a key issue in mobile safety technology.The effect of nanocrystalline cellulose(CNC)on the macrostructure of methane gas hydration slurry was studied,and the changes of kinetic parameters in 10 hours under 5 MPa and 274.2 K were measured.Combining the hydrate coalescence phenomenon with the formation mechanism,the kinetic analysis of the newly formed hydrate slurry was carried out,and the change of the pore structure of the phase change system was studied from the perspective of chemical structure.The results show that in the mass fraction range of 0.1%-0.3%,for every increase of 0.1%particle mass fraction,the induction time is prolonged by 17 min and 74 min respectively,and the highest prolonged by 188%.When CNC exists,there are many spherical pores in the hydrate slurry,which makes the formation of structure-I hydrate have a network.These changes correspond to the changes in induction time measured during the reaction time.

关 键 词：Ⅰ型水合物 纤维素纳米晶 动力学 颗粒 

分 类 号：TE31[石油与天然气工程—油气田开发工程]