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Microscopic morphology evolution of the crystal structure of tetrahydrofuran hydrate under flowing condition

Chinese Journal of Chemical Engineering 2022年第5期35卷 103-110页

作者： Jialu Zhang Xiang Liu Shuai Liu Yuxing Li Qihui Hu Wuchang Wang Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety College of Pipeline and Civil EngineeringChina University of Petroleum(East China)Qingdao 266580China State Key Loboratory of Natural Gas hydrates Beijing 100028China

The evolution of the hydrate particle structure during growth and agglomeration under flowing condition affects the particle as well as flow characteristic,which plays an important role in the flow assurance as well as heat transfer in refrigeration ***,this article conducts experiments to study and observe the growth and agglomeration process in the main forming stage of *** was found that the growth of tetrahydrofuran hydrate was anisotropic and in a layered growth *** crystals generally transformed from octahedral structure to octahedral skeleton structure with growth,however some single crystals also deformed into plate type *** thickness of the plate type particles increased gradually during growth,and the edge part increased earlier than the middle *** agglomeration,the hydrate particles contacted and sintered *** as the impurity didn’t serve as the nucleation center but affected the agglomeration of hydrate particles by *** addition,the effect increased as the sand size ***,a microstructure model for hydrate growth and agglomeration was proposed,which showed the hydrate structure evolution in these processes and could lay a foundation for studying the flow assurance of hydrate slurry.

关键词： tetrahydrofuran hydrate Growth Agglomeration Morphology Microstructure Microstructure model

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The detection of tetrahydrofuran hydrate formation and saturation using magnetic resonance imaging technique

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Journal of Natural Gas Chemistry 2010年第3期19卷 224-228页

作者： Yu Liu Yongchen Song Yongjun Chen Lei Yao Qingping Li Key Lab of Ocean Energy Utilization and Energy Conservation of Ministry of Education Dalian University of Technology Dalian 116024 Liaoning China Research Center of China National Offshore Oil Corporation Beijing 100027 China

tetrahydrofuran（THF） hydrate was formed in bulk as well as in glass beads pack with a mean diameter of 3.0 mm by controlling the temperature under ambient *** of THF hydrate formation procedure were obtained using the magnetic resonance imaging（MRI） *** experiment results showed that MRI is an effective method for the detection of hydrate *** of hydrate formed both in bulk and glass beads can be confirmed by intensity integration of MRI images.

关键词： tetrahydrofuran hydrate magnetic resonance imaging glass beads saturation

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Accelerated nucleation of tetrahydrofuran(THF)hydrate in presence of ZIF-61

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Journal of Natural Gas Chemistry 2012年第3期21卷 299-301页

作者： Yanhong Wang Xuemei Lang Shuanshi Fan School of Chemistry and Chemical Engineering Key Lab of Enhanced Heat Transfer and Energy ConservationMinistry of EducationSouth China University of TechnologyGuangzhou 510640GuangdongChina

Clathrate hydrate can be used in energy gas storage and transportation, CO2 capture and cool storage etc. However, these technologies are difficult to be used due to the low formation rate and long induction time of hydrate formation. In this paper, ZIF-61 （zeolite imidazolate framework, ZIF） was first used in hydrate formation to stimulate hydrate nucleation. As an additive of clathrate hydrate, ZIF-61 promoted obviously the acceleration of tetrahydrofuran （THF） hydrate nucleation. It shortened the induction time of THF hydrate formation from 2-5 h to 0.3-1 h mainly due to the template function of ZIF-61 by which the nucleation of THF hydrate has been promoted.

关键词： tetrahydrofuran hydrate hydrate promoter ZIF-61 nucleation induction time

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