检索结果-南通市图书馆

Dissociation characteristics of methane hydrate using depressurization combined with thermal stimulation

Chinese Journal of Chemical Engineering 2019年第9期27卷 2089-2098页

作者： Mingjun Yang Zhanquan Ma Yi Gao lanlan jiang Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education Dalian University of Technology

Methane hydrate is considered as a potential energy source in the future due to its abundant reserves and high energy *** investigate the influence of initial hydrate saturation,production pressure,and the temperature of thermal stimulation on gas production rate and cumulative gas production percentage,we conducted the methane hydrate dissociation experiments using depressurization,thermal stimulation and a combination of two methods in this *** is found that when the gas production pressures are the same,the higher the hydrate initial saturation,the greater change in hydrate reservoir ***,it is easier to appear the phenomenon of icing and hydrate reformation when the hydrate saturation is *** example,the reservoir temperature dropped to below zero in depressurization process when the hydrate saturation was about 37%.However,the same phenomenon didn’t appear as the saturation was about 12%.This may be due to more free gas in the reservoir with hydrate saturated of 37%.We also find that the temperature variation of reservoir can be reduced effectively by combination of depressurization and thermal stimulation *** the average gas production rate is highest with combined method in the *** the pressure of gas production is 2 MPa,compared with depressurization,the average of gas production can increase 54%when the combined method is *** efficiency of gas production is very low when thermal stimulation was used *** the temperature of thermal stimulation is 11℃,the average rate of gas production in the experiment of thermal stimulation is less than 1/3 of that in the experiment of the combined method.

关键词： Methane hydrate Depressurization Thermal stimulation Dissociation characteristics

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

Visualization of CO_2 and oil immiscible and miscible flow processes in porous media using NMR micro-imaging

引用

Petroleum Science 2011年第2期8卷 183-193页

作者： Zhao Yuechao SongYongchen Liu Yu jiang lanlan Zhu Ningjun Key Laboratory of Ocean Energy Utilization and Energy Conservation of the Ministry of Education Dalian University ofTechnology Dalian Liaoning 116024 China

CO2 flooding is considered not only one of the most effective enhanced oil recovery （EOR） methods, but also an important alternative for geological CO2 storage. In this paper, the visualization of CO2 flooding was studied using a 400 MHz NMR micro-imaging system. For gaseous CO2 immiscible displacement, it was found that CO2 channeling or fingering occurred due to the difference of fluid viscosity and density. Thus, the sweep efficiency was small and the final residual oil saturation was 53.1%. For supercritical CO2 miscible displacement, the results showed that piston-like displacement occurred, viscous fingering and the gravity override caused by the low viscosity and density of the gas was effectively restrained, and the velocity of CO2 front was uniform. The sweep efficiency was so high that the final residual oil saturation was 33.9%, which indicated CO2 miscible displacement could enhance oil recovery more than CO2 immiscible displacement. In addition, the average velocity of CO2 front was evaluated through analyzing the oil saturation profile. A special core analysis method has been applied to in-situ oil saturation data to directly evaluate the local Darcy phase velocities and capillary dispersion rate.

关键词： NMR micro-imaging porous media CO2 flooding enhanced oil recovery saturation

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

Game Theoretic Simulation on the Mimicry Honeypot

引用

Wuhan University Journal of Natural Sciences 2016年第1期21卷 69-74页

作者： SHI Leyi ZHAO Junnan jiang lanlan XING Wenjuan GONG Jian LIU Xin College of Computer and Communication Engineering China University of Petroleum (East China) Qingdao 266580Shandong China Shanghai Key Laboratory of Financial Information Technology Shanghai 200433 China College of Information Science Qingdao Binhai UniversityQingdao 266555 Shandong China

A mimicry honeypot framework based on game theory is presented in our work, which can calculate the equilibrium strategy of the deceptive game using non-cooperative incomplete dynamic game theory, and make decisions for the mimicry framework to deploy the simple service, the honeypot and the fake honeypot. A mimicry prototype is implemented using NS2 platform, and simulation experiments are launched to validate the decision-making result and the deceptive performance of the mimicry honeypot. The empirical study shows that the mimicry honeypot framework based on game theory can be able to influence the equilibrium strategy results by dynamically changing the deployment vector of the mimicry system. It validates that the mimicry honeypot framework has better flexibility, activeness and fraudulence than the traditional honeypot.

关键词： honeypot mimicry honeypot game theory equilibrium Network Simulator 2 (NS2)

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

A review of the gas hydrate phase transition with a microfluidic approach

引用

Energy Reviews 2023年第1期2卷 1-15页

作者： Qingbin Liu Yingying Liu Jintao Xu Ying Teng Zheng Ling Yi Zhang lanlan jiang Yongchen Song Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education Dalian University of TechnologyDalian116024China Shenzhen Key Laboratory of Deep Engineering Sciences and Green Energy Institute of Deep Earth Sciences and Green EnergyCollege of Civil and Transportation EngineeringShenzhen UniversityShenzhen518060China Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization Shenzhen UniversityShenzhen518060China

Over the years,natural gas hydrates(NGHs)have attracted significant attention as an emerging energy *** is a novel technology used to observe the behaviour of NGHs in microchannels directly and has been applied to *** hydrate distributions and phase transitions are key parameters for exploitation and *** this paper,advances in related research with microfluidics-based technology are reviewed,including the hydrate phase transition process and its mechanism of *** formation and decomposition directly influence the efficiency and sustainability of *** addition,studies of the hydrate phase transition provide basic data for future commercial ***,extended applications,further developments and potential improvements in microfluidic techniques are also *** believe that with an improved understanding of the hydrate phase transition mechanism,commercial exploitation of hydrates can be expected soon.

关键词： Clathrate hydrate Microfluidics Morphology Experimental CO_(2)sequestration

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

Adsorption isotherms and kinetic characteristics of methane on block anthracite over a wide pressure range

引用

Journal of Energy Chemistry 2015年第2期24卷 245-256页

作者： Wanli Xing Yongchen Song Yi Zhang Weiguo Liu lanlan jiang Yanghui Li Yuechao Zhao Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education School of Energy and Power Engineering Dalian University of Technology

It is important to quantitatively understand the methane adsorption and transport mechanism in coal for an evaluation of the reserves and for its production forecast. In this work, a block coal sample was chosen to perform the CH_4 adsorption experiments using the gravimetric method at temperatures of 293.60 K, 311.26 K, 332.98 K and 352.55 K and pressures up to 19 MPa. The excess adsorption capacity of CH_4 in dry block anthracite increased, followed by a sequence decrease with the increasing pressure. High temperature restrained the growth of the excess adsorption due to that the adsorption is an intrinsically physical and exothermic process. The excess adsorption peak decreased slowly with the increase of temperature and intersected at a pressure of more than 18 MPa; meanwhile, the pressure at the excess adsorption peak increased. The existing correlations were exanfined in terms of density rather than pressure. The DR＋k correlation, with an average relative deviation of 4-0.51%, fitted our data better than the others, with an average relative deviation of up to 2.29%. The transportation characteristics of CH_4 adsorption was also investigated in this study, including the adsorption rate and diffusion in block coal. The kinetic data could be described by a modified unipore model. The adsorption rates were found to exhibit dependence on pressure and temperature at low pressures, while the calculated diffusivities exhibited little temperature dependence. In addition, the kinetic characteristics were compared between CH_4 and CO_2 adsorption on the block coal. The excess adsorption ratios of CO_2 to CH_4 obtained from the DR＋k model decreased with the increasing pressure.

关键词： adsorption isotherm thermodynamic model adsorption rate diffusion

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-resolution characterization of hexagonal boron nitride coatings exposed to aqueous and air oxidative environments

引用

Nano Research 2017年第6期10卷 2046-2055页

作者： lanlan jiang Na Xiao Bingru Wang Enric Grustan-Gutierrez Xu Jing Petr Babor Miroslav Kogbal Guangyuan Lu Tianru Wu Haomin Wang Fei Hui Yuanyuan Shi Bo Song Xiaoming Xie Mario Lanza Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Suzhou 215123 China CEITEC BUT Brno University of Technology Brno 61669 Czech Republic State Key Laboratory of Functional Materials for In formatics Shanghai Institute of Microsystems and Information Technology Chinese Academy of Sciences Shanghai 200050 China School of Physical Science and Technology Shanghai Tech University Shanghai 201210 China

Hexagonal boron nitride （h-BN） is believed to offer better passivation to metallic surfaces than graphene owing to its insulating nature, which facilitates blocking the flow of electrons, thereby preventing the occurrence of galvanic reactions. Nevertheless, this may not be the case when an h-BN-protected material is exposed to aqueous environments. In this work, we analyzed the stability of mono and multilayer h-BN stacks exposed to H202 and atmospheric conditions. Our experiments revealed that monolayer h-BN is as inefficient as graphene as a protective coating when exposed to H202. Multilayer h-BN offered a good degree of protection. Monolayer h-BN was found to be ineffective in an air atmosphere as well. Even a 10-15 layers-thick h-BN stack could not completely protect the surface of the metal under consideration. By combining Auger electron spectroscopy and secondary ion mass spectrometry techniques, we observed that oxygen could diffuse through the grain boundaries of the h-BN stack to reach the metallic substrate. Fortunately, because of the diffusive nature of the process, the oxidized area did not increase with time once a saturated state was reached. This makes multflayer （not monolayer） h-BN a suitable long-term oxidation barrier. Oxygen infiltration could not be observed by X-ray photoelectron spectroscopy. This technique cannot assess the chemical composition of the deeper layers of a material. Hence, the previous reports, which relied on XPS to analyze the passivating properties of h-BN and graphene, may have ignored some important subsurface phenomena. The results obtained in this study provide new insights into the passivating properties of mono and multilayer h-BN in aqueous media and the degradation kinetics of h-BN-coated metals exposed to an air environment.

关键词： hexagonal boron nitride protective coating local oxidation nanoscale two-dimensional (2D)materials

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

Fe3C-N-doped carbon modified separator for high performance lithium-sulfur batteries

引用

Journal of Energy Chemistry 2019年第12期28卷 101-108页

作者： Hongyu Pan Zhong Tan Haihui Zhou lanlan jiang Zhongyuan Huang Qjaoxia Feng Qiang Zhou Shuai Ma Yafei Kuang State Key Laboratory for Chemo/Biosensing and Chemometrics Hunan UniversityChangsha 410082HunanChina College of Chemistry and Chemical Engineering Hunan UniversityChangsha 410082HunanChina

A new Fe3C-N-doped reduced graphene oxide(Fe3C-N-rGO)prepared by a facile method is used as a separator for high performance lithium-sulfur(Li-S)*** Fe3C-N-rGO is coated on the surface of commercial polypropylene separator(Celgard 2400)close to the sulfur *** special nanotubes are in-situ catalyzed by Fe3C *** could entrap lithium polysulfides(Li PSs)to restrain the shuttle effect and reduce the loss of active *** battery with the modified separator and sulfur cathode shows an excellent cycle *** has a high rate performance,580.5 mAh/g at the high current rate of 4 C relative to 1075 mAh/g at 0.1 *** also has an initial discharge capacity of 774.8 m Ah/g measured at 0.5 C and remains 721.8 mAh/g after 100 cycles with a high capacity retention of 93.2%.The outstanding performances are notable in recently reports with modified separator.

关键词： Fe3C-N-doped reduced graphene oxide Modified separator Sulfur cathode Cyclic and rate performance

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

数字新质生产力、数据要素配置与农业高质量发展

引用

技术经济与管理研究 2024年第12期 90-95页

作者：江兰兰江西师范大学马克思主义理论博士后科研流动站江西南昌330022

数字新质生产力作为传统生产力数字化、高级化的跃迁,逐步成为新时期经济增长的关键引擎,能够为我国农业高质量发展提供新动能。以中国31个省份为研究对象,实证考察2011—2022年数字新质生产力对农业高质量发展的影响效应。研究结果显示... 详细信息

数字新质生产力作为传统生产力数字化、高级化的跃迁,逐步成为新时期经济增长的关键引擎,能够为我国农业高质量发展提供新动能。以中国31个省份为研究对象,实证考察2011—2022年数字新质生产力对农业高质量发展的影响效应。研究结果显示:数字新质生产力能够对农业高质量发展发挥显著正向促进作用;异质性分析表明,数字新质生产力对农业高质量发展的促进效应存在异质性,具体表现为在粮食主产区的促进作用更强;调节效应检验结果表明,数据要素配置可在数字新质生产力赋能农业高质量发展的过程中发挥正向调节作用。

关键词：农业高质量发展数字新质生产力数据要素配置颠覆性技术创新

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

等温微量热技术在土壤微生物学研究中的应用

引用

应用与环境生物学报 2016年第4期22卷 732-738页

作者：姜兰兰刘燕郑世学华中农业大学生命科学技术学院农业微生物学国家重点实验室武汉430070

土壤微生物代谢活性与土壤功能直接相关,是评价土壤质量的灵敏的、普适的综合指标.物质的理化或生物变化过程都伴随着热效应,等温微量热技术可精确测定和跟踪此过程,其研究领域广范并带动土壤微生物的代谢热力学研究蓬勃发展.本文首先... 详细信息

土壤微生物代谢活性与土壤功能直接相关,是评价土壤质量的灵敏的、普适的综合指标.物质的理化或生物变化过程都伴随着热效应,等温微量热技术可精确测定和跟踪此过程,其研究领域广范并带动土壤微生物的代谢热力学研究蓬勃发展.本文首先简要介绍微量热技术、普遍采用的底物诱导法揭示的微生物代谢活性和国内外研究团队.然后重点综述微量热技术在土壤微生物学的主要研究成果,包括代谢热力学可量化微生物对土壤有机碳的同化效率;土壤微生物在短时间内达到最大热释放值,伴随高的生长速率,表明其代谢活性高;代谢热熵(单位微生物热释放值)可指示微生物对土壤有机碳的转化和利用效率,是指示土壤质量的良好指标;外源污染物总体上抑制土壤微生物代谢活性;检测过程中应重视微量热测定的影响因素与条件优化.讨论测定过程中微生物生长条件的标准化和底物问题.最后展望潜在的研究方向,微量热技术与各种技术的有机结合,有望在土壤微生物结构与活性的地理属性、气候变化、土壤质量的空间大尺度比较和外源污染物的生物毒性评价等方面发挥其重要作用.

关键词：代谢热力学底物诱导法微生物活性土壤质量

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

无锡市柏庄生活垃圾转运站工程设计

引用

环境工程 2009年第5期27卷 99-102页

作者：刘晋蒋岚岚无锡市政设计研究院有限公司江苏无锡214072

介绍无锡市柏庄生活垃圾转运站的工程设计。该工程是苏南地区首座采用上投料水平压缩式的中型垃圾转运站。通过技术分析,认为上投料式水平压缩工艺在工艺技术和环境保护上,较其他工艺具有一定的优势。

关键词：上投料水平压缩垃圾转运站生活垃圾工程设计

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

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：