检索结果-南通市图书馆

Investigation of the CO<sub>2</sub>Sequestration by Indirect Aqueous Carbonation of Waste Cement

American Journal of Climate Change 2017年第1期6卷 132-150页

作者： myoungwook mun Heechan Cho Jihoe Kwon Kihong Kim Rina Kim Department of Energy Resources Engineering Seoul National University Seoul Republic of Korea

Mineral carbonation of CO2 with fine-grained waste cement was investigated using NH4Cl as a recyclable extracting agent. The amount of calcium extracted with NH4Cl was not as high as with more commonly used extraction agents such as HCl and CH3COOH. NH4Cl also exhibited high selectivity in the calcium extraction process, such that calcium ions comprised over 99% of the leaching solution. Another positive benefit of using NH4Cl was that precipitation of calcium carbonate by CO2 injection was possible without the addition of basic reagents. Moreover, the NH4Cl regenerated during carbonation can be reused for calcium extraction. However, test results using regenerated NH4Cl solution in a cyclic fashion revealed that the process was not perfectly cyclic, but rather the calcium amount after precipitation increased as the cycle proceeded. The geochemical computer simulation PHREEQC was utilized to gain better insight into the cyclic mineral carbonation processes using NH4Cl solution. The simulation was based on thermodynamic equilibrium so that the amount of Ca in the solution fluctuated between specific values in a periodic fashion, unlike the experimental results of calcium accumulation in the extraction solution. One reason for this phenomenon was the kinetic/thermodynamic balance controlled by the amount of Ca2+ and CO2 present in the solution. However, it was feasible to use a geochemical model to evaluate the mineral carbonation process with the correction factors since the deviation between the experimental and the simulation results remained fairly constant throughout the cycle.

关键词： CO2 Sequestration Mineral Carbonation Waste Cement Ammonium Chloride PHREEQC

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

Analysis of streamwise conduction in forced convection of microchannels using fin approach

引用

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第9期12卷 655-664页

作者： Suhandran munIANDY Yew mun HUNG Faculty of Engineering and Technology Multimedia University Infineon Technologies Sdn Bhd Batu Berendam School of Engineering Monash University

The effects induced by streamwise conduction on the thermal characteristics of forced convection for single-phase liquid flow in rectangular microchannel heat sinks under imposed constant wall temperature have been studied. By employing the fin approach in the first law of analysis, models with and without streamwise conduction term in the energy equation were developed for hydrodynamically and thermally fully-developed flow under local thermal non-equilibrium for the solid and fluid phases. These two models were solved to obtain closed form analytical solutions for the fluid and solid temperature distributions and the analysis emphasized details of the variations induced by the streamwise conduction on the fluid temperature distributions. The effects of the Peclet number, aspect ratio, and thermal conductivity ratio on the thermal characteristics of forced convection in microchannel heat sinks were analyzed and discussed. This study reveals the conditions under which the effect of streamwise conduction is significant and should not be neglected in the forced convective heat transfer analysis of microchannel heat sinks.

关键词： Streamwise conduction Fin approach Microchannel heat sink

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

Experimental Study of Rotational Effect on Stalling

引用

Chinese Physics Letters 2013年第6期30卷 123-126页

作者： LEE Hsiao mun WU Yan-Hua School of Mechanical and Aerospace Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798

Tomographic particle image velocimetry(TPIV)and static pressure measurements are performed in a wind tunnel on a scaled model of the rotor blade of a 5 kW horizontal-axis wind turbine designed by using the blade element momentum *** study is to investigate the physics of the stall-delay phenomenon observed for a rotating *** TPIV experiments are conducted at several span-wise locations of the *** separated flow from the rotating blade is studied and compared with the case of the static stall at similar angles of attack and Reynolds number Re.

关键词： method. blade rotating

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

Development of analysis model for geometric error in turning processes

引用

Journal of Central South University 2011年第3期18卷 711-717页

作者： LEE mun-jae LEE Choon-man Department of Mechanical Design and Manufacturing Engineering Changwon National University

A finite element model was established for analyzing the geometric errors in turning operations and a two-step analyzing process was proposed. In the first analyzing step, the cutting force and the cutting heat for the cutting conditions were obtained using the AdvantEdge. Also, the deformation of a workpiece was estimated in the second step using the ANSYS. The deformation was analyzed for a 150 mm-long workpiece at three different measuring points, such as 10, 70 and 130 mm from a reference point, and the amounts of the deformation were compared through experiments. /n the results of the comparison and analysis, the values obtained from these comparison and analysis represent similar tendencies. Also, it is verified that their geometric errors increase with the increase in temperature. In addition, regarding the factors that affect the deformation of a workpiecc, it can be seen that the geometric error in the lathe is about 15%, the error caused by the cutting force is about 10%, and the deformation caused by the heat is about 75%.

关键词： geometric error machining accuracy finite element analysis turning cutting force, cutting temperature

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

Electrochemical processing of spent nuclear fuels:An overview of oxide reduction in pyroprocessing technology

引用

Progress in Natural Science:Materials International 2015年第6期25卷 572-582页

作者： Eun-Young Choi Sang mun Jeong Korea Atomic Energy Research Institute Department of Chemical Engineering Chungbuk National University

The electrochemical reduction process has been used to reduce spent oxide fuel to a metallic form using pyroprocessing technology for a closed fuel cycle in combination with a metal-fuel fast *** the electrochemical reduction process,oxides fuels are loaded at the cathode basket in molten LiO–LiCl salt and electrochemically reduced to the metal *** approaches based on thermodynamic calculations and experimental studies have been used to understand the electrode reaction and efficiently treat spent *** factors that affect the speed of the electrochemical reduction have been determined to optimize the process and scale-up the electrolysis *** addition,demonstrations of the integrated series of processes(electrorefining and salt distillation) with the electrochemical reduction have been conducted to realize the oxide fuel *** overview provides insight into the current status of and issues related to the electrochemical processing of spent nuclear fuels.

关键词： Pyroprocessing Electrochemical reduction Electrorefining Molten salt Spent oxide fuel

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

Progress and challenges for replacing n-methyl-2-pyrrolidone/polyvinylidene fluoride slurry formulations in lithium-ion battery cathodes

引用

Progress in Natural Science:Materials International 2024年第1期34卷 194-206页

作者： Sung Cik mun Yeong Hoon Jeon Jong Ho Won Battery Materials Research Center LG Chem Department of Energy Engineering Dankook University

With electric vehicles, energy storage systems, and portable electronic devices becoming increasingly popular, the demand for lithium-ion batteries has surged considerably. In the lithium-ion battery industry, n-methyl-2-pyrrolidone(NMP) is widely used as the solvent for cathode slurry, and polyvinylidene fluoride(PVDF) is used as the cathode binder. However, because of the harmful effect of NMP on the environment and human health, the use of NMP and PVDF for lithium-ion batteries will be highly regulated in the future. Therefore, developing eco-friendly alternatives is crucial for formulating systems using new solvents and binders. Despite numerous efforts, these alternatives have not been widely adopted across the lithium-ion battery industry. It is due to their limited ability to compete on price or performance to replace the traditional NMP/PVDF slurry formulations. This review investigates developments in the search for new solvents and binders that can be used in cathode slurry compositions. The new systems can potentially decrease energy consumption and manufacturing costs associated with NMP recovery, energy-intensive drying processes, and material expenses. We discuss key factors and technical challenges from earlier studies and compare them with the current, optimized formulations based on NMP and PVDF.

关键词： Lithium-ion battery Eco-friendly alternative Slurry formulation Chemical regulation Binder performance

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

Characterization and thrust measurements from electrolytic decomposition of ammonium dinitramide(ADN)based liquid monopropellant FLP-103 in MEMS thrusters

引用

Chinese Journal of Chemical Engineering 2018年第9期26卷 1992-2002页

作者： Asad Rahman Jitkai Chin Feroz Kabir Yew mun Hung Department of Chemical and Environmental Engineering University of Nottingham Malaysia Campus Jalan Broga43500 SemenyihSelangorMalaysia Department of Engineering and Mathematics Sheffield Hallam UniversitySheffield S1 1WBUnited Kingdom Department of Mechanical Engineering Monash University Sunway Campus Jalan Lagoon Selatan47500 5ubang JayoSelangorMalaysia

Although ammonium dinitramide(ADN)has been targeted as a potential green monopropellant in future space vehicles,its application potential in Micro-electrical–Mechanical System(MEMS)thrusters or microthrusters has been seldom reported in open *** this paper,electrolytic decomposition of Ammonium Dinitramide(ADN)-based liquid monopropellant FLP-103 was carried out in an open chamber and MEMS thrusters were fabricated from poly-dimethylsiloxane(PDMS)to characterize the power *** thrust measurement methods were employed to investigate the electrolytic decomposition of FLP-103 in MEMS *** results show that the monopropellant can be successfully ignited at room temperature through 80 V,0.1 A(8 W)using copper wire as *** the current thruster design,low thrust was obtained at FLP-103 flowrate of 40μl·min^(-1)but it generated the highest specific impulse,Isp,among all the flowrates *** experiments successfully demonstrated the potential application of electrolytic decomposition of FLP-103 in MEMS thrusters.

关键词： Ammonium Dinitramide (ADN) FLP-103 Electrolytic decomposition MEMS thruster

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

Assessment of Pb uptake,translocation and immobilization in kenaf (Hibiscus cannabinus L.) for phytoremediation of sand tailings

引用

Journal of Environmental Sciences 2008年第11期20卷 1341-1347页

作者： HO Wai mun ANG Lai Hoe LEE Don Koo Forest Research Institute Malaysia 52109 KepongSelangorMalaysia Department of Forest Sciences Seoul National UniversitySeoul 151-921Korea

The potential of kenaf (Hibiscus cannabinus L.) for phytoremediation of lead (Pb) on sand tailings was investigated.A pot experiment employing factorial design with two main effects of fertilizer and lead was conducted in a nursery using sand tailings from an ex-tin mine as the growing *** showed that Pb was found in the root,stem,and seed capsule of kenaf but not in the *** of organic fertilizer promoted greater biomass yield as well as higher accumulation capacity of *** Pb-spike...

关键词： kenaf lead fertilizer bioaccumulation capacity phytoremediation

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

Atraumatic splenic rupture after cocaine use and acute Epstein-Barr virus infection: A case report and review of literature

引用

World Journal of Gastrointestinal Surgery 2019年第12期11卷 433-442页

作者： Allan mun Fai Kwok Department of Surgery Wollongong Hospital

BACKGROUND Atraumatic splenic rupture(ASR)accounts for just over 3%of all cases of splenic rupture and is associated with a high mortality *** most common culprit is acute infection with Epstein-Barr virus(EBV)but other documented aetiologies include neoplasia,other viral/bacterial infections,acute and chronic pancreatitis,amyloidosis and anticoagulant *** are four previous reports of cocaine-associated ASR but never before has it been documented in combination with concurrent acute EBV *** SUMMARY A 21-year-old man presented to hospital with acute left shoulder pain which radiated to the right shoulder and upper *** denied any history of recent trauma and had no relevant past medical *** took no regular prescription medications but had used cocaine within the previous 24 *** revealed splenomegaly,a Grade 3 subcapsular splenic haematoma,moderate haemoperitoneum and an incidental 9 mm splenic artery *** was also serological evidence of acute EBV *** endovascular embolisation of the pseudoaneurysm was performed and the splenic rupture was managed *** patient remained admitted in hospital for seven days and did not require any transfusion of blood *** imaging showed complete resolution of the haemoperitoneum after 5 *** importance of abstinence from illicit drug use was emphasised to the patient but it is unknown whether or not he remains *** This case demonstrates that ASR is a rare condition that can result from acute EBV infection and cocaine ingestion and requires a high index of suspicion to diagnose clinically.

关键词： Atraumatic Spontaneous Splenic rupture Cocaine Epstein-Barr virus Splenic artery pseudoaneurysm Case report

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

Integrated management of facility,process,and output:data model perspective

引用

Science China(Information Sciences) 2012年第5期55卷 994-1007页

作者： LEE Seunghoon HAN Soonhung mun Duhwan Department of Mechanical Engineering Korea Advanced Institute of Science and Technology373-1 Gusong-dongYuseong-guDaejeon 305-701South Korea Division of Ocean Systems Engineering Korea Advanced Institute of Science and TechnologyDaejeon 305-701South Korea Department of Precision Mechanical Engineering Kyungpook National University386 Gajang-dongSangjuGyeongsangbuk-do 742-711South Korea

As the manufacturing industry matures,vast amounts of data related to products are created by many kinds of engineering systems during the manufacturing *** include data for a variety of facilities,manufacturing processes,and the input and output of each process (input material,by-products,and intermediate and final products).Effective operation and maintenance of manufacturing facilities and eco-friendly products are gradually becoming important issues due to increased environmental regulations and changes in the enterprise business *** this reason,increased efficiency in data management is necessary in the manufacturing *** this paper,existing data models for the integration of lifecycle data are analyzed according to their application *** the analysis,information requirements for the integrated management of facility,process,and output data are *** to these requirements,a data model appropriate for this integration is *** an application case study,the use of the proposed data model for the effective operation and maintenance of manufacturing facilities is ***,benefit,limitation,and improvement of the proposed data model are discussed.

关键词： integrated product data management ISO 10303 STEP PDM schema ISO 10303 STEP PLCS ISO 15926 process plants product lifecycle management manufacturing facility management

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：