检索结果-南通市图书馆

A review: Enhanced recovery of natural gas hydrate reservoirs

Chinese Journal of Chemical Engineering 2019年第9期27卷 2062-2073页

作者： Fengguang Li Qing Yuan Tianduo Li Zhi Li Changyu Sun Guangjin Chen Shandong Provincial Key Laboratory of Molecular Engineering Qilu University of Technology(Shandong Academy of Science)Jinan 250653China School of Chemistry and Chemical Engineering Liaocheng UniversityLiaocheng 252059China State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249China

Natural gas hydrate(NGH)is a highly efficient and clean energy,with huge reserves and widespread distribution in permafrost and marine areas.Researches all over the world are committed to developing an effective exploring technology for NGH reservoirs.In this paper,four conventional in-situ hydrate production methods,such as depressurization,thermal stimulation,inhibitor injection and CO2 replacement,are briefly introduced.Due to the limitations of each method,there has been no significantly breakthrough in hydrate exploring technology.Inspired by the development of unconventional oil and gas fields,researchers have put forward some new hydrate production methods.We summarize the enhanced hydrate exploiting methods,such as CO2/N2–CH4 replacement,CO2/H2–CH4 replacement,hydraulic fracturing treatment,and solid exploration;and potential hydrate mining techniques,such as self-generating heat fluid injection,geothermal stimulation,the well pattern optimization of hydrate exploring.The importance of reservoir stimulation technology for hydrate exploitation is emphasized,and it is believed that hydrate reservoir modification technology is a key to open hydrate resources exploitation,and the major challenges in the process of hydrate exploitation are pointed out.The combination of multiple hydrate exploring technologies and their complementary advantages will be the development trend in the future so as to promote the process of hydrate industrialization.

关键词： Hydrate Exploration/exploitation recovery Production Stimulation technology

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

The impact of connate water saturation and salinity on oil recovery and CO2 storage capacity during carbonated water injection in carbonate rock

引用

Chinese Journal of Chemical Engineering 2019年第7期27卷 1699-1707页

作者： Mahmood Shakiba Masoud Riazi Shahab Ayatollahi Mostafa Takband Department of Petroleum Engineering Amirkabir University of TechnologyTehranIran Enhanced Oil recovery (EOR) Research Centre IOR/EOR Research InstituteShiraz UniversityShirazIran Petroleum Engineering Department School of Chemical and Petroleum Eng.Shiraz UniversityShirazIran School of Chemical and Petroleum Engineering Sharif University of TechnologyTehranIran

Carbonated water injection(CWI)is known as an efficient technique for both CO2 storage and enhanced oil recovery(EOR).During CWI process,CO2 moves from the water phase into the oil phase and results in oil swelling.This mechanism is considered as a reason for EOR.Viscous fingering leading to early breakthrough and leaving a large proportion of reservoir un-swept is known as an unfavorable phenomenon during flooding trials.Generally,instability at the interface due to disturbances in porous medium promotes viscous fingering phenomenon.Connate water makes viscous fingers longer and more irregular consisting of large number of tributaries leading to the ultimate oil recovery reduction.Therefore,higher in-situ water content can worsen this condition.Besides,this water can play as a barrier between oil and gas phases and adversely affect the gas diffusion,which results in EOR reduction.On the other hand,from gas storage point of view,it should be noted that CO2 solubility is not the same in the water and oil phases.In this study for a specified water salinity,the effects of different connate water saturations(Swc)on the ultimate oil recovery and CO2 storage capacity during secondary CWI are being presented using carbonate rock samples from one of Iranian carbonate oil reservoir.The results showed higher oil recovery and CO2 storage in the case of lower connate water saturation,as 14%reduction of Swc resulted in 20%and 16%higher oil recovery and CO2 storage capacity,respectively.

关键词： Carbonated water Connate water Carbonate reservoir Enhanced oil recovery Secondary recovery CO2 storage

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

Separation and recovery of associated rare earths from the Zhijin phosphorite using hydrochloric acid

引用

Journal of Rare Earths 2019年第4期37卷 443-450页

作者： Dengpan Nie An Xue Mingyang Zhu Yu Zhang Jianxin Cao College of Resource and Environmental Engineering Guizhou University School of Chemical Engineering Guizhou Minzu University Guizhou Institute of Metallurgical and Chemical Engineering School of Chemistry and Chemical Engineering Guizhou University

The separation and extraction of associated rare earths from the Zhijin phosphorite mine is of great interest. Based on previous studies, the hydrolysis of phosphate ore using hydrochloric acid was systematically studied through extensive testing. Experiments were conducted to separate and recover the rare earths from the hydrolysis solution. Kinetic studies on the acidolysis of phosphorite using hydrochloric acid show that the use of hydrochloric acid in the acidolysis of phosphorite is mainly controlled by a chemical reaction and is also a diffusion-controlled reaction. When 210 L of HCL per 100 kg of phosphorite was used at 30 ℃ for 360 min, 96.1% of the P_2 O_5 and 95.0% of the rare earths are leached from the phosphorite. After defluorination and purification, the pH of the phosphate-acid solution is adjusted to 2.1 using sodium hydroxide, and a rare earth concentrate with rare earth content of 1.76 wt%is obtained; i.e., 90.1% of the rare earths are recovered. The rare earth content is increased to more than5 wt% through multiple enrichment processes, with a total yield of 59.5%.

关键词： Zhijin phosphorite mine Rare earths Leaching Separation recovery

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

recovery of Polyester/Cotton Blended Fabrics by Alkali Dissolution

引用

Journal of Donghua University(English Edition) 2019年第5期36卷 475-478页

作者：张晏铭张娜余燕平 Key Laboratory of Textile Science&Technology Ministry of EducationShanghai 201620China College of Textiles Donghua UniversityShanghai 201620China

A new type of alkali-soluble polyester/cotton blended yarns was used to knit a compact knitted fabric on a circular weft knitting machine,treated with 5 g/L NaOH solution for 60 min at a temperature of 100℃,and the polyester was completely dissolved.The dissolved polyester could be polymerized again by a polycondensation reaction.After the cotton fibers were opened and combed,the length and mechanical properties of the cotton fibers were tested.The physical and mechanical properties of the separated cotton fibers were good.The chemical structure and crystallinity were analyzed by Fourier transform infrared(FTIR)spectroscopy and X-ray diffraction(XRD)analysis.It could be seen that the chemical structure of cotton fibers was almost unchanged after treatment,and the crystallinity decreased slightly.It provides some reference for the separation and recycling of waste polyester/cotton fabrics.

关键词： polyester/cotton fabric separation and recovery alkali dissolution recycling

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

Roles of Eph/ephrin bidirectional signaling during injury and recovery of the central nervous system

引用

Neural Regeneration Research 2018年第8期13卷 1313-1321页

作者： Yue Wan Jin-Shan Yang Li-Cai Xu Xiao-Jiang Huang Wei Wang Min-Jie Xie Department of Neurology The Third People's Hospital of Hubei Province Wuhan Hubei Province China Department of Neurology Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei ProvinceChina Department of Neurology First Affiliated Hospital Fujian Medical University Fuzhou Fujian Province China Department of Neurological Rehabilitation Center The Third People's Hospital of Hubei Province Wuhan Hubei Province China

Multiple cellular components, including neuronal, glial and endothelial ceils, are involved in the sophis- ticated pathological processes following central nervous system injury. The pathological process cannot reduce damage or improve functional recovery by merely targeting the molecular mechanisms of neuronal cell death after central nerve system injuries. Eph receptors and ephrin ligands have drawn wide attention since the discovery of their extensive distribution and unique bidirectional signaling between astrocytes and neurons. The roles of Eph/ephrin bidirectional signaling in the developmental processes have been re- ported in previous research. Recent observations suggest that Eph/ephrin bidirectional signaling continues to be expressed in most regions and cell types in the adult central nervous system, playing diverse roles. The Eph/ephrin complex mediates neurogenesis and angiogenesis, promotes glial scar formation, regulates endocrine levels, inhibits myelin formation and aggravates inflammation and nerve pain caused by injury. ~lhe interaction between Eph and ephrin is also considered to be the key to angiogenesis. This review focus- es on the roles of Eph/ephrin bidirectional signaling in the repair of central nervous system injuries.

关键词： nerve regeneration Eph/ephrin bidirectional signaling central nervous system injury recovery neurons glial cells

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

recovery of high-purity Pt from Pt-Au bimetallic nanoparticles using organic aqua regia

引用

Rare Metals 2012年第1期31卷 92-95页

作者： LIN Wei School of Materials Science & Engineering,Georgia Institute of Technology,Atlanta,Georgia,30332,USA School of Materials Science & Engineering Georgia Institute of Technology Atlanta USA

Using organic aqua regia,a recently discovered powerful organic leaching agent,an effective process of recovering Pt directly from Pt-Au bimetallic nanoparticles was demonstrated.The purities of the Pt recovered from a mixture of Au and Pt nanoparticles and from Pt-Au core-shell nanoparticle catalyst are as high as (99.49±0.22)%,and (95.02±0.08)%,respectively.The novel recovery process promises applications in catalysis industry.

关键词： organic aqua regia bimetallic platinum gold nanoparticle recovery

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

Damage and recovery of fiber Bragg grating under radiation environment

引用

Chinese Physics B 2018年第9期27卷 230-236页

作者：温世喆熊伟晨黄力平王镇锐张兴斌何振辉 School of Material Science and Engineering Sun Yat-Sen University Center for Space Technology Sun-Yat Sen University School of Engineering Sun Yat-Sen University School of Physics Sun Yat-Sen University School of Physics and Astronomy Sun Yat-Sen University State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-Sen University

To develop the application of fiber Bragg gratings as temperature and strain sensors in space environments, it is necessary to understand the effect of high-energy radiation on the performance of the fiber Bragg grating. We performed an experiment involving Co（60）-γ ionizing irradiation with a total dose of 1.01 × 10~6 rad on two Ge-doped single-mode fiber Bragg gratings with central wavelengths of 825 and 835 nm, respectively. We found that, with the increase of radiation dose, the redshift of the peak wavelength of the reflection spectrum of the fiber Bragg gratings indicated the increase of the refractive index and the number of color centers. After irradiation, the refractive index decreased with the decreasing number of color centers. We analyzed the influence of ionizing irradiation on the transmission performance of the fiber Bragg gratings using a color-center model, which explained the experimental results. The proposed model was used to determine the creation rate and annihilation rates of the color center, which are foundational data for using the fiber Bragg gratings in space applications.

关键词： fiber Bragg grating radiation color center refractive index damage recovery annihilation

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 Task Allocation Method for Stream Processing with recovery Latency Constraint

引用

Journal of Computer Science & Technology 2018年第6期33卷 1125-1139页

作者： Hong-Liang Li Jie Wu Zhen Jiang Xiang Li Xiao-Hui Wei College of Computer Science and Technology Jilin University Changchun 130012 China Key Laboratory of Symbolic Computation and Knowledge Engineering of the Ministry of Education Changchun 130012 China Department of Computer and Information Sciences Temple University Philadelphia PA 19122 U.S.A. Department of Computer Science West Chester University of Pennsylvania West Chester PA 19383 U.S.A.

Stream processing applications continuously process large amounts of online streaming data in real time or nearreal time. They have strict latency constraints. However, the continuous processing makes them vulnerable to any failures,and the recoveries may slow down the entire processing pipeline and break latency constraints. The upstream backupscheme is one of the most widely applied fault-tolerant schemes for stream processing systems. It introduces complexbackup dependencies to tasks, which increases the difficulty of controlling recovery latencies. Moreover, when dependenttasks are located on the same processor, they fail at the same time in processor-level failures, bringing extra recovery latencies that increase the impacts of failures. This paper studies the relationship between the task allocation and therecovery latency of a stream processing application. We present a correlated failure effect model to describe the recoverylatency of a stream topology in processor-level failures under a task allocation plan. We introduce a recovery-latency awaretask allocation problem （RTAP） that seeks task allocation plans for stream topologies that will achieve guaranteed recoverylatencies. We discuss the difference between RTAP and classic task allocation problems and present a heuristic algorithmwith a computational complexity of O（n log2 n） to solve the problem. Extensive experiments were conducted to verify thecorrectness and effectiveness of our approach. It improves the resource usage by 15%-20% on average.

关键词： stream processing task allocation fault-tolerance upstream backup, recovery latency

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

recovery of waste heat in cement plants for the capture of CO2

引用

Frontiers of Chemical Science and Engineering 2012年第1期6卷 104-111页

作者： Ruifeng DONG Zaoxiao ZHANG Hongfang LU Yunsong YU State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong UniversityXi'an 710049China

Large amounts of energy are consumed during the manufacturing of cement especially during the calcination process which also emits large amounts of CO2. A large part of the energy used in the making of cement is released as waste heat. A process to capture CO2 by integrating the recovery and utilization of waste heat has been designed. Aspen Plus software was used to calculate the amount of waste heat and the efficiency of energy utilization. The data used in this study was based on a dry process cement plant with a 5-stage preheater and a precalciner with a cement output of 1 Mt/y. According to the calculations： 1） the generating capacity of the waste heat recovery system is 4.9MW. 2） The overall CO2 removal rate was as high as 78.5%. 3） The efficiency of energy utilization increased after the cement producing process was retrofitted with this integrated design.

关键词： cement industry waste heat recovery utiliza-tion CO2 removal

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

Effect of high magnetic field on the recovery of tempered martensite

引用

Progress in Natural Science:Materials International 2020年第1期30卷 134-137页

作者： Guanghui Wu Tingping Hou Zihua Li Long Chen Hengfu Lin Kaiming Wu The State Key Laboratory for Refractories and Metallurgy Hubei Province Key Laboratory of Systems Science in Metallurgical ProcessWuhan University of Science and Technology

Influence of a 12 T high magnetic field on the recovery of tempered martensite in the chromium-containing steel was investigated.The results showed that a high magnetic field caused the percentage of low angle boundaries θbetween 5°～8° to increase by about 8%,while correspondingly decreased the percentage of high angle boundaries(> 15°) by 9%.With the application of the magnetic field,the strain energy increased due to the higher density of free dislocations in the martensite,which leads to the retardation of recovery and little change in its lath shape due to the inhibition of the transition from low to high angle boundaries to maintain lower energy in the matrix.

关键词： High magnetic field Dislocations Grain boundaries Martensite recovery

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

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：