Procedia Chemistry最新文献_第7页

Solubility, Miscibility and Processability of Thermosetting Monomers as Reactive Plasticizers of Polyetherimide 热固性单体作为聚醚酰亚胺活性增塑剂的溶解度、混相性和加工性

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/J.PROCHE.2016.03.084

A. Rusli, Nurul Shahira Mohd Raffi, H. Ismail

引用次数: 5

The EURO-GANEX Process: Current Status of Flowsheet Development and Process Safety Studies EURO-GANEX工艺:流程开发和工艺安全研究的现状

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.10.073

Robin Taylor , Mike Carrott , Hitos Galan , Andreas Geist , Xavier Hères , Chris Maher , Chris Mason , Rikard Malmbeck , Manuel Miguirditchian , Giuseppe Modolo , Chris Rhodes , Mark Sarsfield , Andreas Wilden

{"title":"The EURO-GANEX Process: Current Status of Flowsheet Development and Process Safety Studies","authors":"Robin Taylor , Mike Carrott , Hitos Galan , Andreas Geist , Xavier Hères , Chris Maher , Chris Mason , Rikard Malmbeck , Manuel Miguirditchian , Giuseppe Modolo , Chris Rhodes , Mark Sarsfield , Andreas Wilden","doi":"10.1016/j.proche.2016.10.073","DOIUrl":"10.1016/j.proche.2016.10.073","url":null,"abstract":"<div><p>A new hydrometallurgical grouped actinide extraction process has been developed to separate the transuranic actinide ions from dissolved spent fuel solution (after an initial uranium extraction cycle). This “EURO-GANEX” process is aimed towards the homogeneous recycling of plutonium and minor actinides in a future closed fuel cycle. The separation process is based on the co-extraction of actinides and lanthanides from aqueous nitric acid into an organic phase followed by selective co-stripping of actinides. A suitable organic phase has been formulated and distribution ratios determined for lanthanides, actinides and some problematic fission products under extraction and stripping conditions. The process flowsheet has been proven on surrogate feed solutions as well as with spent fast reactor fuel; excellent recoveries of the actinides and good decontamination factors from the lanthanides and other fission products were obtained. A variation on the EURO-GANEX flowsheet (the “TRU-SANEX” process) has now been designed to produce separate Pu+Np and Am+Cm products for heterogeneous recycling. Progress on underpinning process chemistry and safety studies as well as flowsheet tests are summarized.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":"21 ","pages":"Pages 524-529"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.10.073","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79088720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 43

Investigation of the Mixing Medium Effect on the Development of the CCTO Microstructure at 1000 ̊C 1000℃时混合介质对CCTO微观组织发展影响的研究

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/J.PROCHE.2016.03.133

R. A. Zaman, M. Abu, J. J. Mohamed, M. F. Ain, Z. Ahmad

引用次数: 4

Development of Mathematical Model of H2O-HNO3-UO2(NO3)2-TBP-diluent System H2O-HNO3-UO2(NO3)2- tbp稀释体系数学模型的建立

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.10.072

Alexander Ochkin, Dmitry Gladilov, Sergey Nekhaevskiy, Alexey Merkushkin

引用次数: 1

Assessment of the Reaction Time on the Morphology and Quality of Carbon Nanotubes – Silica Microparticles 反应时间对碳纳米管-二氧化硅微粒形貌和质量的影响

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.03.055

Raja N. Othman , Arthur N. Wilkinson

{"title":"Assessment of the Reaction Time on the Morphology and Quality of Carbon Nanotubes – Silica Microparticles","authors":"Raja N. Othman , Arthur N. Wilkinson","doi":"10.1016/j.proche.2016.03.055","DOIUrl":"10.1016/j.proche.2016.03.055","url":null,"abstract":"<div><p>Carbon nanotube has been grafted in-situ on the surface of spherical silica gel via floating-catalyst chemical vapour deposition method. The reaction temperature was set to be 760°C and 5wt. % of ferrocene catalyst (dissolved in toluene) injected into the furnace at a rate of 0.04ml/min. The reaction time was varied from 1 hour to 8hours, with one hour interval. It was found that the reaction time of 3hours yields the best quality hybrid particles. Prolonging the reaction time more than 3hours resulted in the formation of CNT that consists of thicker tubes, based on the observation via Field Emission Scanning Electron Microscope (FESEM) and Transmission Electron Microscope (TEM). Secondary overgrowth was observed via TEM for tubes synthesized at 7hours and 8hours. These results were in agreement with Raman Spectroscopy analysis where the I<sub>G</sub>/I<sub>D</sub> ratio were very small, indicating high defects and impurities in the samples synthesized at reaction time higher than 3hours.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":"19 ","pages":"Pages 571-576"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.03.055","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81568008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effect of Immersion Duration in Liquid Nitrogen for Cryorolled A5052 Aluminium Sheet Alloy 液氮浸泡时间对冷轧A5052铝合金的影响

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.03.100

N.M. Anas, W.L. Quah, H. Zuhailawati, A.S. Anasyida

引用次数: 14

Electrocoagulation Process by Using Aluminium and Stainless Steel Electrodes to Treat Total Chromium, Colour and Turbidity 铝和不锈钢电极电混凝法处理总铬、色度和浊度

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.03.070

Mohd Khairul Nizam Mahmad , M.A.Z. Mohd Remy Rozainy , Ismail Abustan , Norlia Baharun

{"title":"Electrocoagulation Process by Using Aluminium and Stainless Steel Electrodes to Treat Total Chromium, Colour and Turbidity","authors":"Mohd Khairul Nizam Mahmad , M.A.Z. Mohd Remy Rozainy , Ismail Abustan , Norlia Baharun","doi":"10.1016/j.proche.2016.03.070","DOIUrl":"10.1016/j.proche.2016.03.070","url":null,"abstract":"<div><p>The research works involve the study of removal of Total Chromium, Colour and Turbidity contaminations in landfill leachate by electrocoagulation process. This project focused on leachate landfill from Pulau Burung, Nibong Tebal, Penang as an electrolyte solution. Heavy metals are the main factor contributing to pollution in leachate landfill. Leachate is the main pollution factors from landfill sites and must be treated before it is released into the environment<sup>1</sup>. Landfill leachate contain high amount of heavy metals that can cause serious health problems to human, if the wastewater that contained heavy metals is not treated properly<sup>2</sup>. This project tried to reduce and treat the heavy metal that contain in the landfill leachate. Types of electrodes used in this study were Aluminium (grade 5052) and Stainless Steel (grade 316). The ranges of initial pH applied were pH (3, 4, 5, 6 and 7) and voltages applied were 1.5V, 2.0V and 2.5V. At the end of electrocoagulation process, the solutions were stored and analysed using Atomic Absorption Spectroscopy (AAS) to determine the final concentration of electrolyte solution. It was found that, the difference electrodes have different effectiveness in removing Total Chromium, colour and turbidity, relies on the types of electrodes (Aluminium or Stainless Steel). Based on the result, can be concluded that Aluminium Electrodes are best for removal of turbidity and colour. Stainless Steel Electrodes is best for removal Total Chromium. The initial pH also gives the significant effect to removal of heavy metal and the maximum voltages give higher removal of heavy metal.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":"19 ","pages":"Pages 681-686"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.03.070","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83576073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 58

Long-term Environmental Assessment of Waste from PyroGreen System 焦绿系统废弃物的长期环境评价

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.10.059

Heejae Ju, Inhye Hahm, Sungjune Sohn, Il Soon Hwang

{"title":"Long-term Environmental Assessment of Waste from PyroGreen System","authors":"Heejae Ju, Inhye Hahm, Sungjune Sohn, Il Soon Hwang","doi":"10.1016/j.proche.2016.10.059","DOIUrl":"10.1016/j.proche.2016.10.059","url":null,"abstract":"<div><p>We have conducted a long-term environmental assessment of a geological repository for Intermediate Level Wastes (ILW) arising from PyroGreen processes that has been developed to decontaminate all HLW from the pyrochemical partitioning of spent nuclear fuels (SNF). PyroGreen process has been designed so that final ILW can meet conservative acceptance criteria such as one established for the Waste Isolation Pilot Plant (WIPP) in U.S.A. The nuclide inventory of final vitrified PyroGreen waste is calculated using ORIGEN 2.1 based on the design decontamination factor of PyroGreen processes applied to 18,171 metric tons of PWR SNF with 45 GWD/MTU burnup. Using GoldSim model, the environmental impact of ILW upon geological disposal at an intermediate depth. Among radioactive nuclides, Ra226, Rn222 and Sn126 are identified as key contributors to radiological dose for general public. The environmental impact of PyroGreen wastes satisfies the Korean dose limit of 0.1 mSv/year with sufficiently high margin. Sensitivity studies have shown that the predicted dose can vary significantly by distribution coefficient of Ra226 and Rn222, solubility limit of Se79.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":"21 ","pages":"Pages 425-432"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.10.059","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79244616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Physical and Structural Transformations of Perlis Carbonate Rocks via Mechanical Activation Route 机械活化作用下Perlis碳酸盐岩物理结构转变

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.03.069

T.N.A.S. Tengku Mustafa, S.R.R. Munusamy, D.N. Uy Lan, N.F.M. Yunos

{"title":"Physical and Structural Transformations of Perlis Carbonate Rocks via Mechanical Activation Route","authors":"T.N.A.S. Tengku Mustafa, S.R.R. Munusamy, D.N. Uy Lan, N.F.M. Yunos","doi":"10.1016/j.proche.2016.03.069","DOIUrl":"10.1016/j.proche.2016.03.069","url":null,"abstract":"<div><p>Carbonate rocks were mechanically activated in a high energy planetary ball mill using dry grinding method. The fine grinding test works were carried out with the same ball to powder ratio (9:1) at three levels of revolution speed (250rpm, 350rpm and 450rpm) and grinding time (30min, 60min, 90min) respectively. The chemical composition and elemental constituents of the raw dolomite and limestone samples were determined using X-ray fluorescence (XRF) and energy dispersive X-ray spectroscopy (EDX). The structural properties such as degree of crystallinity (DOC), crystallite sizes and lattice strains of non-activated and mechanically activated carbonate rocks were analyzed using X-ray diffraction (XRD) while the morphological analysis conducted using scanning electron microscopy (SEM). Results obtained showed that high revolution speed and longer grinding duration have pronounced effect on the grindability, increase in fineness, decrease in crystallite sizes and amorphization of Perlis dolomite compared to the limestone source. This might be due to the difference in material hardness and existence of appreciable amount of quartz content in limestones.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":"19 ","pages":"Pages 673-680"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.03.069","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83950163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Pretreatment of Oil Palm Empty Fruit Fiber (OPEFB) with Aquaeous Ammonia for High Production of Sugar 含水氨预处理油棕空果纤维高产糖研究

Procedia Chemistry Pub Date : 2016-01-01 DOI: 10.1016/j.proche.2016.01.024

Nursyafiqah Zulkiple, Mohamad Yusuf Maskat, Osman Hassan

{"title":"Pretreatment of Oil Palm Empty Fruit Fiber (OPEFB) with Aquaeous Ammonia for High Production of Sugar","authors":"Nursyafiqah Zulkiple, Mohamad Yusuf Maskat, Osman Hassan","doi":"10.1016/j.proche.2016.01.024","DOIUrl":"10.1016/j.proche.2016.01.024","url":null,"abstract":"<div><p>Corncob Oil Palm Empty Fruit Bunch (OPEFB) is an agricultural residue that has the potential to become a good source for renewable feedstock for production of sugar. This work evaluated the effectiveness of aqueous ammonia as pretreatment at low (soaking, SAA) and elevated temperature (Pressurized Chamber) to deconstruct the lignocellulosic feedstock, prior to enzymatic hydrolysis. The ammonia pretreatments were compared against the standard NaOH method. The best tested Pressurized Chamber method conditions were at 100°C with 3 hour retention time, 12.5% Ammonium hydroxide and 1:30 solid loading. The digestibility of the feedstock is determined with enzymatic hydrolysis using Cellic Ctech2 and Cellic Htech2. The sugars produced by Pressurized Chamber method within 24 hour of enzyme hydrolysis are similar to that produced by NaOH method which is 439.90mg/ml and 351.61mg/ml, respectively. Compared with optimum SAA method (24 hour, 6.25% of ammonium hydroxide at room temperature), Pressurized Chamber method was capable of producing enhanced delignification and higher production of sugar upon hydrolysis. These findings were supported by the disappearance peak at 1732, 1512 and 1243 on Fourier Transform Infrared (FTIR spectrum) of treated OPEFB by Pressurized Chamber method. XRD determination showed reduced crystallinity of OPEFB (37.23%) after treatment by Pressurized Chamber, suggesting higher accessibility toward enzyme hydrolysis. The data obtained suggest that the Pressurized Chamber pre-treatment method are suitable for OPEFB deconstruction to produce high yield of sugar.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":"18 ","pages":"Pages 155-161"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.01.024","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87993155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 46