Growth and aggregation micromorphology of natural gas hydrate particles near gas-liquid interface under stirring condition

作     者：Qihui Hu Xiaoyu Wang Wuchang Wang Yuxing Li Shuai Liu Qihui Hu;Xiaoyu Wang;Wuchang Wang;Yuxing Li;Shuai Liu

作者机构：Shandong Key Laboratory of Oil-Gas Storage and Transportation SafetyCollege of Pipeline and Civil EngineeringChina University of PetroleumQingdao 266580China State Key Laboratory of Natural Gas HydratesBeijing 100028China Research Institute of Experiment and DetectionPetro China Xinjiang Oilfield CompanyKaramay 834000China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2021年第34卷第12期

页      面：65-77页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 082002[工学-油气田开发工程] 

基　　金：This work was supported by the National Natural Science Foun-dation of China(51974349,U19B2012,51991363) the Natural Science Foundation of Shandong Province(ZR2017MEE057) which are gratefully acknowledged 

主　　题：Natural gas hydrate Growth Aggregation Gas-liquid interface Micromorphology Physical model 

摘      要：To investigate the morphological evolution of the whole growth and aggregation processes of hydrate crystals near the gas–liquid interface,we used a high-pressure visual reactor with high-speed camera to capture the micromorphology of hydrate particles in a natural gas+pure water system with pressure from 2.6 to 3.6 MPa and sub-cooling from 4.7 to 6.23
*** results showed that under low sub-cooling conditions,the amount and size of particles increased first and then decreased in the range of 0–330 lm,and the small particles always *** particles can be roughly classified into two categories:planar flake particles and polyhedral solid ***,the concept of maximum growth dominant particle size was proposed to distinguish the morphological boundary of growth and *** addition,the micro model was established to better reflect the effects of particle formation process and evolution mechanism near the gas–liquid interface under stirring *** results of this study can provide a guidance for flow assurance in multiphase pipeline.