检索结果-南通市图书馆

Enhanced gas production and CO_(2) storage in hydrate-bearing sediments via pre-depressurization and rapid CO_(2) injection

引用

Chinese Journal of Chemical Engineering 2024年第3期67卷 126-134页

作者： Hongnan Chen Yifei Sun Bojian Cao Minglong Wang Ming Wang Jinrong Zhong Changyu Sun Guangjin Chen State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China School of Chemistry and Chemical Engineering Changsha University of Science&TechnologyChangsha 410114China

Carbon emission reduction and clean energy development are urgent demands for mankind in the coming decades.Exploring an efficient CO_(2) storage method can significantly reduce CO_(2) emissions in the short term.In this study,we attempted to construct sediment samples with different residual CH_(4) hydrate amounts and reservoir conditions,and then investigate the potentials of both CO_(2) storage and enhanced CH_(4) recovery in depleted gas hydrate deposits in the permafrost and ocean zones,respectively.The results demonstrate that CO_(2) hydrate formation rate can be significantly improved due to the presence of residual hydrate seeds;However,excessive residual hydrates in turn lead to the decrease in CO_(2) storage efficiency.Affected by the T-P conditions of the reservoir,the storage amount of liquid CO_(2) can reach 8 times that of gaseous CO_(2),and CO_(2) stored in hydrate form reaches 2-4 times.Additionally,we noticed two other advantages of this method.One is that CO_(2) injection can enhance CH_(4) recovery rate and increases CH_(4) recovery by 10%-20%.The second is that hydrate saturation in the reservoir can be restored to 20%-40%,which means that the solid volume of the reservoir avoids serious shrinkage.Obviously,this is crucial for protecting the goaf stability.In summary,this approach is greatly promising for high-efficient CO_(2) storage and safe exploitation of gas hydrate.

关键词： hydrate Depressurization CO_(2) storage CH_(4) production Reservoir remediation

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Microscopic study on the key process and influence of efficient synthesis of natural gas hydrate by in situ Raman analysis of water microstructure in different systems with temperature drop

引用

Journal of Energy Chemistry 2023年第7期82卷 317-333,I0008页

作者： Wei Zhang Chun-Gang Xu Xiao-Sen Li Zhuo-Yi Huang Zhao-Yang Chen School of Engineering Science University of Science and Technology of ChinaHefei 230023AnhuiChina Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou 510640GuangdongChina CAS Key Laboratory of Gas hydrate Guangzhou 510640GuangdongChina Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou 510640GuangdongChina School of Energy Science and Engineering University of Science and Technology of ChinaHefei 230023AnhuiChina

Gas hydrate technology has considerable potential in many fields.However,due to the lack of understanding of the micro mechanism of hydrate formation,it has not been commercially applied so far.Gas hydrate formation is essentially a gas-liquid-solid phase transition of water and gas molecules at a certain temperature and pressure.The key to the hydrate formation is the transformation of water molecule from disordered arrangement to ordered arrangement.In this process,weakly hydrogen bonded water will be correspondingly converted to strongly hydrogen bonded water.Through in situ Raman analysis and experiments,the position change of the corresponding peaks of the strongly hydrogen bonded water and the weakly hydrogen bonded water was compared in this work,and the key microscopic process and influence of gas hydrate formation in different systems were comprehensively studied and summarized.It is found that,with the decrease of temperature,the OAH of the weakly hydrogen bonded water remains unchanged when the temperature drops to a certain value,which is the key to the transformation of water into cage hydrate rather than ice.The conversion from the weakly hydrogen bonded water to the strongly hydrogen bonded water is closely related to the gas-liquid interface force,the hydrophilicity/hydrophobicity of the promoter,the ionization degree of liquid,and the electrostatic field of the system.Among the four most common promoters,tetrahydrofuran(THF)has the highest efficiency in promoting methane(CH4)hydrate formation.Therefore,this study provides a scientific direction and basis for the development of high efficient hydrate formation promoters,which can effectively weaken the hydrogen bond of weakly hydrogen bonded water and promote the conversion of weakly hydrogen bonded water to strongly hydrogen bonded water.

关键词： hydrate Conversion Hydrogen bonded water Promoter Micro mechanism

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Methane hydrate crystal growth on shell substrate

引用

Chinese Journal of Chemical Engineering 2022年第3期35卷 50-61页

作者： Xin Jiang Baojiang Sun Zhiyuan Wang Wantian Zhou Jiakai Ji Litao Chen School of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580China Key Laboratory of Unconventional Oil and Gas Development China University of Petroleum(East China)Qingdao 266580China

hydrate crystals growth on the surface of methane bubble(hydrate film)in pure water was studied by using a high-pressure visible microscope under the conditions of subcoolingΔT=5.44-13.72 K and methane concentration differenceΔC=2.92-8.19 mol·L^(-1).It was found the hydrate film is porous and the hydrate crystals grow towards the liquid phase on the film substrate.The crystal morphology and growth rate are affected byΔT andΔC.WhenΔThydrate grows into scattered columnar crystals,and the axial growth rate of the crystal gradually decreases.WhenΔT>8.82 K orΔC>4.12 mol·L^(-1),the hydrate crystals grow in dendritic shape,and the axial growth rate increases first and then decreases.The perimeter and area of the growing hydrate crystals were measured,and the fractal dimension of hydrate crystal under differentΔC andΔT was calculated.The results show that the fractal dimension of columnar hydrate crystal is greater than 3.When3.87 mol·L^(-1)hydrate crystal is greater than 4;The fractal dimension of dendritic hydrate crystal is less than 3.WhenΔC>4.77 mol·L^(-1),ΔThydrate crystal is less than 2.

关键词： Methane hydrate Crystal growth Morphology Fractal dimension

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Alcohols for hydrate inhibition-Different alcohols and different mechanisms

引用

Petroleum 2022年第1期8卷 1-16页

作者： Bjorn Kvamme Na Wei Jinzhou Zhao Shouwei Zhou Liehui Zhang Wantong Sun Navid Saeidi State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500China State Key Laboratory of Natural Gas hydrate Beijing10027China Hyzenenergy Laguna Hills92656USA Strategic Carbon LLC Portsmouth03801USA

Methanol has been used to prevent hydrate formation in industrial handling of hydrate forming mixtures containing water for many decades.Ethanol is also used for the same purpose in countries that have easy access to low price ethanol,like for instance Brasil.Common to these small alcohols is that they also have surfactant properties that will promote hydrate formation,but when added to water in sufficient amounts,the hydrate prevention characteristics will dominate.These alcohols will primarily prevent heterogeneous hydrate formation on the interface between water and a separate hydrate phase.The effect of“alcohol”on both of these routes to hydrate formation are investigated and compared to experimental data.In particular we also investigate the effects of these small alcohols on Gibbs free energy for the hydrate formed on the new,shifted,stability conditions.Gibbs free energy is generally higher than hydrate formed from pure water.Enthalpies of hydrate formation are also higher for hydrate formed from water containing alcohols.These are negative numbers,so in absolute values released formation enthalpy is lower.The presence of these alcohols in water will also prevent homogeneous hydrate formation from dissolved hydrate formers in water.Glycols have more important roles in other routes to hydrate nucleation.Heterogeneous hydrate nucleation towards mineral surfaces is feasible in different ways.Polar hydrate formers like H2S and CO_(2)can adsorb directly on rust,and as discussed here,are able to form hydrate from adsorbed state on rust surface.Non-polar hydrocarbons like,for instance methane might get trapped in structured water and then nucleate to hydrate.Some research on this is published and further research is in progress.Glycols have very strong attraction to rust and corresponding chemical potentials for adsorbed glycols on rust are favourable enough to facilitate phase transition from glycols dissolved in water over to adsorption.Injection of glycol in gas processing plants has been used by industry for

关键词： hydrate Non-equilibrium Thermodynamics Alcohols Nucleation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Mechanism and control factors of hydrate plugging in multiphase liquid-rich pipeline flow systems: a review

引用

Frontiers in Energy 2022年第5期16卷 747-773页

作者： Shuwei ZHANG Liyan SHANG Zhen PAN Li ZHOU You GUO College of Petroleum Engineering Liaoning Petrochemical UniversityFushun 113001China College of Environmental and Safety Engineering Liaoning Petrochemical UniversityFushun 113001China College of Petrochemical Technology Liaoning Petrochemical UniversityFushun 113001China Fushun City Special Equipment Supervision and Inspection Institute Fushun 113001China

There is nothing illogical in the concept that hydrates are easily formed in oil and gas pipelines owing to the low-temperature and high-pressure environment,although requiring the cooperation of flow rate,water content,gas-liquid ratio,and other specific factors.Therefore,hydrate plugging is a major concern for the hydrate slurry pipeline transportation technology.In order to further examine potential mechanisms underlying these processes,the present paper listed and analyzed the significant research efforts specializing in the mechanisms of hydrate blockages in the liquid-rich system,including oil-based,water-based,and partially dispersed systems(PD systems),in gathering and transportation pipelines.In addition,it summarized the influences of fluid flow and water content on the risk of hydrate blockage and discussed.In general,flow rate was implicated in the regulation of blockage risk through its characteristic to affect sedimentation tendencies and flow patterns.Increasing water content can potentiate the growth of hydrates and change the oil-water dispersion degree,which causes a transition from completely dispersed systems to PD systems with a higher risk of clogging.Reasons of diversity of hydrate plugging mechanism in oil-based system ought to be studied in-depth by combining the discrepancy of water content and the microscopic characteristics of hydrate particles.At present,it is increasingly necessary to expand the application of the hydrate blockage formation prediction model in order to ensure that hydrate slurry mixed transportation technology can be more maturely applied to the natural gas industry transportation field.

关键词： hydrate flow rate water content mechanism of pipeline blockage rich liquid phase system

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Investigation on hydrate growth at the oil–water interface:In the presence of asphaltene

引用

Chinese Journal of Chemical Engineering 2022年第5期35卷 211-218页

作者： Guangchun Song Yuanxing Ning Yuxing Li Wuchang Wang Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety College of Pipeline and Civil EngineeringChina University of PetroleumQingdao 266580China State Key Laboratory of Natural Gas hydrates Beijing 100028China

Natural gas hydrates can readily form in deep-water oil production processes and pose a great threat to the oil industry.Moreover,the coexistence of hydrate and asphaltene can result in more severe challenges to subsea flow assurance.In order to study the effects of asphaltene on hydrate growth at the oil-water interface,a series of micro-experiments were conducted in a self-made reactor,where hydrates nucleated and grew on the surface of a water droplet immersed in asphaltene-containing oil.Based on the micro-observations,the shape and growth rate of the hydrate shell formed at the oil-water interface were mainly investigated and the effects of asphaltene on hydrate growth were analyzed.According to the experimental results,the shape of the water droplet and the interfacial area changed significantly after the formation of the hydrate shell when the asphaltene concentration was higher than a certain value.A mechanism related to the reduction of the interfacial tension caused by the absorption of asphaltenes on the interface was proposed for illustration.Moreover,the growth rate of the hydrate shell decreased significantly with the increasing asphaltene concentration under experimental conditions.The conclusions of this paper could provide preliminary insight how asphaltene affect hydrate growth at the oil-water interface.

关键词： hydrate Asphaltene Interface Growth Shape

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Synthesis and evaluation of poly(N-vinyl caprolactam)-co-tert-butyl acrylate as kinetic hydrate inhibitor

引用

Chinese Journal of Chemical Engineering 2022年第10期50卷 317-325页

作者： Xing Huang Ran Zhu Liwei Cheng Yijian Zhu Peng Xiao Xiaohui Wang Bei Liu Changyu Sun Weixin Pang Qingping Li Guangjin Chen Xinjing Xu Jinfeng Ji State Key Laboratory of Natural Gas hydrates/College of Chemical Engineering and Environment China University of PetroleumBeijing 102249China State Key Laboratory of Natural Gas hydrate CNOOCBeijing 100010China College of Chemistry and Chemical Engineering Neijiang Normal UniversityNeijiang 641100China Faculty of Engineering China University of GeosciencesWuhan 430074China Hainan Longpan Oilfield Technology Co. LtdHainan 571900China

Low dosage kinetic hydrate inhibitors(KHIs)are a kind of alternative chemical additives to high dosage thermodynamic inhibitors for preventing gas hydrate formation in oil&gas production wells and transportation pipelines.In this paper,a new KHI,poly(N-vinyl caprolactam)-co-tert-butyl acrylate(PVCapco-TBA),was successfully synthesized with N-vinyl caprolactam(NVCap)and tert-butyl acrylate.The kinetic inhibition performances of PVCap-co-TBA on the formations of both structureⅠmethane hydrate and structureⅡnatural gas hydrate were investigated by measuring the onset times of hydrate formation under different conditions and compared with commercial KHIs such as PVP,PVCap and inhibex 501.The results indicated that PVCap-co-TBA outperformed these widely applied inhibitors for both structureⅠand structureⅡhydrates.At the same dosage of KHI,the maximum tolerable degree of subcooling under which the onset time of hydrate formation exceeded 24 hours for structureⅠhydrate was much lower than that for structureⅡhydrate.The inhibition strength increased with the increasing dosage of PVCap-co-TBA;The maximum tolerable degree of subcooling for the natural gas hydrate is more than10 K when the dosage was higher than 0.5%(mass)while it achieved 12 K when that dosage rose to0.75%(mass).Additionally,we found polypropylene glycol could be used as synergist at the dosage of 1.0%(mass)or so,under which the kinetic inhibition performance of PVCap-co-TBA could be improved significantly.All evaluation results demonstrated that PVCap-co-TBA was a very promising KHI and a competitive alternative to the existing commercial KHIs.

关键词： hydrate Kinetics Inhibitor Poly(N-vinyl aprolactam)–co-tert-butyl acrylate Synergist Synthesis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

hydrate agglomeration modeling and pipeline hydrate slurry flow behavior simulation

引用

Chinese Journal of Chemical Engineering 2019年第1期27卷 32-43页

作者： Guangchun Song Yuxing Li Wuchang Wang Kai Jiang Zhengzhuo Shi Shupeng Yao Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety College of Pipeline and Civil EngineeringChina University of Petroleum

Dynamic modeling and numerical simulation of hydrate slurry flow behavior are of great importance to offshore hydrate management.For this purpose, a dynamic model of hydrate agglomeration was proposed in this paper.Based on population balance equation, the frame of the dynamic model was established first, which took both hydrate agglomeration and hydrate breakage into consideration.Then, the calculating methods of four key parameters involved in the dynamic model were given according to hydrate agglomeration dynamics.The four key parameters are collision frequency, agglomeration efficiency, breakage frequency and the size distribution of sub particles resulting from particle breakage.After the whole dynamic model was built, it was combined with several traditional solid–liquid flow models and then together solved by the CFD software FLUENT 14.5.Finally, using this method, the influences of flow rate and hydrate volume fraction on hydrate particle size distribution, hydrate volume concentration distribution and pipeline pressure drop were simulated and analyzed.

关键词： hydrate Agglomeration Flow behavior Dynamic model Numerical simulation Population balance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

High efficient development of green kinetic hydrate inhibitors via combined molecular dynamic simulation and experimental test approach

引用

Green Chemical Engineering 2022年第1期3卷 34-43页

作者： Liwei Cheng Jinlong Cui Jia Li Ran Zhu Bei Liu Shuai Ban Guangjin Chen State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing102249China

The development of environmental friendly low dose hydrate inhibitors like kinetic hydrate inhibitors(KHIs)is of great significance for the flow assurance in oil&gas production and transportation.In this work,a combined molecular dynamic simulation and experimental verification approach was adopted to increase the efficiency of KHIs development.The inhibition effect of a series of copolymers(N-vinylpyrrolidone and N-acrylate)on hydrate growth was studied by using both molecular dynamics simulation and experimental approaches.The simulation results demonstrated that introduction of hydrophobic ester and butyl group in PVP is beneficial for the inhibition.The length of the alkyl chain of ester group played an important role in improving inhibition performance.PVP-A,the one being introduced butyl ester group into PVP gets the best inhibition effect.In addition,inhibitors can restrict methane bubbles to re-dissolve into the liquid phase,thereby inhibiting the growth of methane hydrate.Increasing the interaction between KHIs and methane can also improve the inhibitory effect of KHIs.The experimental results confirm the reliability of the molecular dynamics simulation.

关键词： hydrate Molecular dynamics hydrate inhibition Kinetic hydrate inhibitors

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Research progress on hydrate plugging in multiphase mixed rich-liquid transportation pipelines

引用

Frontiers in Energy 2022年第5期16卷 774-792页

作者： Shuyu SONG Zhiming LIU Li ZHOU Liyan SHANG Yaxin WANG College of Petroleum Engineering Liaoning Shihua UniversityFushun 113001China College of Chemistry Chemical Engineering and Environmental EngineeringLiaoning Shihua UniversityFushun 113001China College of Journal Editorial Department Liaoning Shihua UniversityFushun 113001China

The plugging mechanism of multiphase mixed rich-liquid transportation in submarine pipeline is a prerequisite for maintaining the fluid flow in the pipeline and ensuring safe fluid flow.This paper introduced the common experimental devices used to study multiphase flow,and summarized the plugging progress and mechanism in the liquid-rich system.Besides,it divided the richliquid phase system into an oil-based system,a partially dispersed system,and a water-based system according to the different water cuts,and discussed the mechanism of hydrate plugging.Moreover,it summarized the mechanism and the use of anti-agglomerates in different systems.Furthermore,it proposed some suggestions for future research on hydrate plugging.First,in the oil-based system,the effect factors of hydrates are combined with the mechanical properties of hydrate deposit layer,and the hydrate plugging mechanism models at inclined and elbow pipes should be established.Second,the mechanism of oilwater emulsion breaking in partially dispersed system and the reason for the migration of the oil-water interface should be analyzed,and the property of the free water layer on the hydrate plugging process should be quantified.Third,a complete model of the effect of the synergy of liquid bridge force and van der Waals force in the waterbased system on the hydrate particle coalescence frequency model is needed,and the coalescence frequency model should be summarized.Next,the dynamic analysis of a multiphase mixed rich-liquid transportation pipeline should be coupled with the process of hydrate coalescence,deposition,and blockage decomposition.Finally,the effects of anti-agglomerates on the morphological evolution of hydrate under different systems and pipeline plugging conditions in different media should be further explored.

关键词： hydrate rich-liquid phase plugging mechanism coalescence deposition anti-agglomerate

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：