Academic literature on the topic 'Flash point'

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Journal articles on the topic "Flash point"

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Horgan, John. "Flash Point." Scientific American 260, no. 4 (April 1989): 18–20. http://dx.doi.org/10.1038/scientificamerican0489-18.

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Patil, G. S. "Estimation of flash point." Fire and Materials 12, no. 3 (September 1988): 127–31. http://dx.doi.org/10.1002/fam.810120307.

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Coats, Karen. "Flash Point (review)." Bulletin of the Center for Children's Books 66, no. 5 (2013): 252. http://dx.doi.org/10.1353/bcc.2013.0003.

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Liaw, Horng-Jang. "Minimum flash point behavior of ternary solutions with three minimum flash point binary constituents." Fuel 217 (April 2018): 626–32. http://dx.doi.org/10.1016/j.fuel.2018.01.023.

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Tang, Yan Fei, Lei Yin, Yi Niu, and Jian Wang. "Experiment Study on Aviation Kerosene's Flash Point Temperature of Low Pressure Environment." Advanced Materials Research 415-417 (December 2011): 2160–65. http://dx.doi.org/10.4028/www.scientific.net/amr.415-417.2160.

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Flash point is one of the major physical and chemical properties used to determine the fire and explosion hazards of liquids; therefore, the prediction of flash point is an important safety consideration. However, the study on flash point and the correlation between flash point and pressure has been inadequate, and needs further investigation. So in this paper, the experimental method is adopted to study the correlation between the closed flash point temperature of RP-5 Aviation Kerosene and low pressure environment. In the experiments, use the BS-1 closed bomb apparatus to measure the oil samples and use the hypobaric chamber to change the environment pressure from 50kPa to 101.3kPa. Through the experiment data, it indicates that the atmospheric pressure is much lower than the normal atmosphere, there is a quadratic function relation between the reciprocal Aviation Kerosene's flash points and logarithm of environment pressure, therefore the relationship between the reciprocal Aviation Kerosene’s flash points and altitude is reciprocal. Compared the experiment results with theoretical results, it finds that the experiment result is closed to reality. The experiment results will provide the scientific data for the safety of aircraft tank, and benefit the fire protection, such as inflammable liquid production, transport, storage et al in oil pipeline management.
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Tang, Yan Fei, Chao Ding, Ya Ping He, De Chuang Zhou, and Jian Wang. "Studies on the Effect of Altitude on the Flammable Liquids' Flash Point." Advanced Materials Research 908 (March 2014): 345–48. http://dx.doi.org/10.4028/www.scientific.net/amr.908.345.

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Presented in this paper is part of an experimental series conducted at different altitudes to investigate the influence of altitude on the flammable liquids flash point. The BS-1 closed bomb apparatus is used to measure the flash points of two flammable liquids (dimethylacetylamide (DMA) and RP-5 Jet A) in a hypobaric chamber under the altitude change from 4860 km to the sea level. The experimental results show that the flash points of DMA and Jet A decrease linearly with the increase in altitude in the low altitude region below the corresponding critical altitudes but non-linearly above. The critical altitudes for DMA and RP-5 Jet A are found to be 3 km and 3.83 km respectively. When the altitude reaches or surpasses the critical altitude, the flash point decreases rapidly. In particular, the flash point of the DMA exhibits a peculiar sudden transition above the critical altitude.
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Li, X., P. P. Duan, K. N. Sun, and X. Yan. "Prediction of the Flash Point of Binary and Ternary Straight-Chain Alkane Mixtures." Advances in Materials Science and Engineering 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/239023.

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The flash point is an important physical property used to estimate the fire hazard of a flammable liquid. To avoid the occurrence of fire or explosion, many models are used to predict the flash point; however, these models are complex, and the calculation process is cumbersome. For pure flammable substances, the research for predicting the flash point is systematic and comprehensive. For multicomponent mixtures, especially a hydrocarbon mixture, the current research is insufficient to predict the flash point. In this study, a model was developed to predict the flash point of straight-chain alkane mixtures using a simple calculation process. The pressure, activity coefficient, and other associated physicochemical parameters are not required for the calculation in the proposed model. A series of flash points of binary and ternary mixtures of straight-chain alkanes were determined. The results of the model present consistent experimental results with an average absolute deviation for the binary mixtures of 0.7% or lower and an average absolute deviation for the ternary mixtures of 1.03% or lower.
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Le, Tu C., Mathew Ballard, Phillip Casey, Ming S. Liu, and David A. Winkler. "Illuminating Flash Point: Comprehensive Prediction Models." Molecular Informatics 34, no. 1 (November 4, 2014): 18–27. http://dx.doi.org/10.1002/minf.201400098.

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Liu, Xinshuai, and Zhenyi Liu. "Research Progress on Flash Point Prediction." Journal of Chemical & Engineering Data 55, no. 9 (September 9, 2010): 2943–50. http://dx.doi.org/10.1021/je1003143.

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Rowley, J. R., D. K. Freeman, R. L. Rowley, J. L. Oscarson, N. F. Giles, and W. V. Wilding. "Flash Point: Evaluation, Experimentation and Estimation." International Journal of Thermophysics 31, no. 4-5 (March 10, 2010): 875–87. http://dx.doi.org/10.1007/s10765-010-0716-x.

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Dissertations / Theses on the topic "Flash point"

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Ingram, James Martyn. "Development of an explosimeter for the determination of residual fuel oil head space flammability hazards." Thesis, London South Bank University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336418.

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Ho, San-Ping. "Water spray suppression and intensification of high flash point hydrocarbon pool fires." Link to electronic thesis, 2003. http://www.wpi.edu/Pubs/ETD/Available/etd-0829103-153046.

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Rowley, Jeffrey R. "Flammability Limits, Flash Points, and Their Consanguinity: Critical Analysis, Experimental Exploration, and Prediction." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2233.

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Accurate flash point and flammability limit data are needed to design safe chemical processes. Unfortunately, improper data storage and reporting policies that disregard the temperature dependence of the flammability limit and the fundamental relationship between the flash point and the lower flammability limit have resulted in compilations filled with erroneous values. To establish a database of consistent flammability data, critical analysis of reported data, experimental investigation of the temperature dependence of the lower flammability limit, and theoretical and empirical exploration of the relationship between flash points and temperature limits are undertaken. Lower flammability limit measurements in a 12-L ASHRAE style apparatus were performed at temperatures between 300 K and 500 K. Analysis of these measurements showed that the adiabatic flame temperature at the lower flammability limit is not constant as previously thought, rather decreases with increasing temperature. Consequently the well-known modified Burgess-Wheeler law underestimates the effect of initial temperature on the lower flammability limit. Flash point and lower temperature limit measurements indicate that the flash point is greater than the lower temperature limit, the difference increasing with increasing lower temperature limit. Flash point values determined in a Pensky-Martens apparatus typically exceed values determined using a small-scale apparatus above 350 K. Data stored in the DIPPR® 801 database and more than 3600 points found in the literature were critically reviewed and the most probable value recommended, creating a database of consistent flammability data. This dataset was then used to develop a method of estimating the lower flammability limit, including dependence on initial temperature, and the upper flammability limit. Three methods of estimating the flash point, with one based entirely on structural contributions, were also developed. The proposed lower flammability limit and flash point methods appear to predict close to, if not within, experimental error.
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Carrion, Domenech Luis Enrique. "Study of high flash point ethyl alcohol-based secondary fluids applied in Ground Source Heat Pumps systems." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-260335.

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Ethyl alcohol (ethanol) as secondary fluids is very popular as heat transfer fluid for indirect refrigeration system with ground source heat pump systems (GSHP) in several countries such as Sweden, Norway, Switzerland, Finland and other European countries. There have been several researches about the future ofthe refrigeration sector, refrigerants and refrigeration systems. Moreover, strict regulations such as F-gasregulation and Kigali Amendment forcing a phase down of many current widely used high global warming potential (GWP) refrigerants, i.e. R134a or R410A. Therefore, secondary refrigeration systems and their working fluids are expected to play a key role in order to minimize the refrigerant charge in the systems, reduce the indirect refrigerant leakages as well as increase the safety during operation. The aim of this thesis is to investigate the effect different additives to increase the flame point together with ethanol-based secondary fluids and validate their thermophysical properties by comparing them with reference values for pure ethanol water solutions. The study aims to design a new commercial ethyl alcohol-based product for GSHP system that could replace existing ones in the Swedish market and could workwith natural or flammable low GWP refrigerants. Different high flash point additives were tested such as 1-propyl alcohol, n-butyl alcohol, glycerol andpropylene carbonate. Thermophysical properties were investigated and a GSHP model in Excel was created in order to assess the energy performance of the resulted blends. After screening different blends and assessing the energy performance, glycerol as additive in low concentration seems to be the future for the ethyl alcohol-based secondary fluids because of its high flashpoint (160ºC) that will reduce the flammability risk associated to ethyl alcohol blends, the low viscosity (by 12% lower compared to pure ethyl alcohol blends) that help reduce pumping power by 4.5% compared topure ethyl alcohol blends. Moreover, ethyl alcohol and glycerol blend showed the lost in heat transfer coefficient by 4% lower compared to pure ethyl alcohol blends due to lower thermal conductivity compared to pure ethyl alcohol blends. Finally, it is a rather cheap and natural product which has no problem related to corrosion since ethyl alcohol and glycerol are less corrosive than water. Although, flash point test was not conducted so there is no data regarding the flash point, it is expected the flash point is increased due to the high flash point of glycerol compared to ethyl alcohol or other possible additives. Therefore, it is expected that the flammability risk associated to ethyl alcohol-based secondary fluids is reduced.
Etylalkohol (etanol) som köldbärare är mycket populärt som värmeöverföringsvätska för indirekt kylsystemmed bergvärmepumpsystem (BVP) i Sverige, Norge, Schweiz, Finland och andra europeiska länder. Fleraundersökningar har gjorts om kylsektorns framtid, köldmedier och kylsystem. Dessutom strängaförordningar som F-gas förordning och Kigali- förordning tvingar en utfasning av många nuvarande allmäntanvända köldmedier med den höga globala uppvärmningspotentialen (GWP), dvs. R134a eller R410A. Därför förväntas det att kylsystem och deras köldbärare spela en nyckelroll för att minimera köldmediumsmängd i systemen, minska de indirekta köldmedieläckage och öka säkerheten under drift. Syftet med detta examensarbete är att undersöka effekten av olika tillsatser för att öka flammanpunkten tillsammans med etanolbaserade köldbärare och validera deras termofysikaliska egenskaper genom att jämföra dem med referensvärden för rena etanolvattenlösningar. Studien syftar till att utforma en nykommersiell etylalkoholbaserad produkt för BVP-system som skulle kunna ersätta befintliga produkter på den svenska marknaden och kan arbeta med naturliga eller brandfarliga köldmedier med låg GWP. Olika tillsatser med hög flampunkt testades såsom 1-propylalkohol, n-butylalkohol, glycerol och propylenkarbonat. Termofysikaliska egenskaper undersöktes och en BVP-modell i Excel skapades för att bedöma energiprestanda för olika blandningarna. De erhållna resultaten för olika blandningar visar att glycerol i en låg koncentration som tillsats kan vara framtidens additiv för de etylalkoholbaserade köldbärare på grund av dess höga flampunkt (160 ºC) som förmodligen kan minska brandrisken för etylalkoholblandningar. Dessutom hade glycerol och etanolblandningar den lägsta viskositeten (c.a.12% lägre jämfört med ren etylalkoholblandningar) som bidrar tillen minskning av pumpeffekten med c.a. 4,5% jämfört med rena etylalkoholblandningar. Däremot visade etylalkohol och glycerol blandningen c.a. 4% lägre värmeöverövergångstal jämfört med de rena etylalkoholblandningar på grund av lägre värmeledningsförmåga jämfört med ren etylalkoholblandningar. Slutligen är glycerol en ganska billig och naturlig produkt som inte har några korrosionsproblem eftersom etylalkohol och glycerol är mindre frätande än vatten. Även om flampunkttest inte genomfördes i projektet, förväntas det att flampunkten ökas lite på grund av den höga flampunkten av glycerol jämfört med etylalkohol och andra tillsatser. Därför förväntas det att brännbarhetsrisken förknippad med etylalkoholbaserade köldbärare reduceras.
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Carareto, Natalia Daniele Dorighello 1984. "Solid-liquid equilibrium and flash point of fatty mixtures = Equilíbrio sólido-líquido e ponto de fulgor de misturas graxas." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/255155.

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Orientadores: Antonio José de Almeida Meirelles, Mariana Conceição da Costa, Jérôme Pauly
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos
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Resumo: O estudo das propriedades físico-químicas de materiais graxos é uma demanda mundial crescente, principalmente devido ao incentivo do seu uso como fonte de energia e para a alimentação. Faz-se importante estudar e compreender todas as condições de equilíbrio que podem ser observadas durante o processamento de compostos graxos, por exemplo, óleos vegetais e biodieseis, desde a sua extração, refino e estocagem. Dados de equilíbrio sólido-líquido podem ser usados para melhorar ou propor novos processos de separação. Já o ponto de fulgor é uma propriedade importante que deve ser observada no armazenamento, transporte e produção de compostos inflamáveis, como o biodiesel. Este trabalho teve como objetivos estudar o equilíbrio sólido-líquido de misturas binárias graxas formadas por álcoois graxos, ésteres graxos ou ácidos graxos, e avaliar o ponto de fulgor de misturas de ésteres etílicos, que são constituintes principais de biodieseis, e etanol, presente em teores residuais. Os pontos de fulgor de ésteres etílicos, e também de misturas binárias destes ésteres com etanol foram determinados experimentalmente e a partir dos resultados foi proposto um modelo empírico para a predição do ponto de fulgor de biodieseis em função da sua composição e teor de etanol. Os diagramas de equilíbrio sólido-líquido de sistemas binários formados por ácidos + álcoois graxos ou formados por álcoois + álcoois graxos foram determinados experimentalmente através de calorimetria exploratória diferencial (DSC) com a intenção de melhor compreender as reações eutética, peritética e metatética que aparecem nos diagramas de equilíbrio tanto com taxas de aquecimento linear ou via o uso da ferramenta de stepscan DSC. Para complementar o estudo foram usadas técnicas de difração de Raios-X e microscopia óptica com controle de temperatura. O efeito da pressão sobre o equilíbrio sólido-líquido foi avaliado para misturas binárias de ésteres etílicos ou de álcoois graxos utilizando-se microscopia ótica acoplada a um aparato experimental que permite o aumento da pressão até 80 MPa. Foram utilizados os modelos termodinâmicos para coeficiente de atividade Margules 2 e 3-sufixos e NRTL para descrever a linha liquidus dos sistemas que apresentaram ponto peritético, e um modelo termodinâmico preditivo foi aplicado para modelar o ESL em função da pressão e, em ambos os casos, obteve-se um ajuste satisfatório em comparação aos dados experimentais
Abstract: The study on the physicochemical properties of fatty materials has acquired a growing importance, mainly due to the incentive of their use in energy and nutrition. The efficient production and use of fatty compounds requires a good knowledge of their properties and phase behavior that are necessary for development of processes, especially in production steps such as extraction and refining, but also during storage of the final products. Solid-liquid equilibrium data can be used to improve or propose new separation processes. Also the flash point is an important property that must be considered during storage, transportation and production of flammable compounds, such as biodiesel. This work aimed to study the solid-liquid equilibrium of binary mixtures consisting of fatty alcohols, fatty esters or fatty acids, and to evaluate the flash point of mixtures of ethyl esters, the major constituents of biodiesels, and ethanol, also present in biodiesel in residual levels. Flash points of ethyl esters, and also of the binary mixtures of ethyl esters with ethanol were determined experimentally. An empirical model for predicting the flash point of biodiesels as a function of composition and ethanol content was proposed. The solid-liquid phase diagrams of binary mixtures of fatty alcohol + fatty alcohol or fatty alcohols + fatty acid were determined experimentally by differential scanning calorimetry (DSC), using a linear heating rate, or by a stepscan DSC method, with the aim of investigating the occurrence of the eutectic, peritectic and metatectic reactions. X-ray diffraction and optical microscopy with temperature control techniques were applied to complement the understanding of the phase diagrams. The effect of pressure on the solid-liquid equilibrium was investigated for the binary mixtures of ethyl esters or fatty alcohols using an optical microscope coupled to a high pressure cell which allows the pressure increase up to 80 MPa. Margules 2 and 3-suffix and NRTL thermodynamic models were used for describing the liquidus line of the systems that presented peritectic point, and a predictive thermodynamic model was used to model the ESL function of pressure, which in both cases, gave a satisfactory fit compared to the experimental data
Doutorado
Engenharia de Alimentos
Doutora em Engenharia de Alimentos
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Mattos, Rodrigo Alves de 1979. "Estudo da influência de aditivos naturais nos pontos de entupimento a frio, de turbidez e de fulgor de biodiesel e de misturas diesel-biodiesel." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/248843.

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Orientador: Matthieu Tubino
Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Química
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Resumo: O presente trabalho foi realizado usando biodieseis preparados a partir de óleos de soja, canola, milho, girassol e, também, de gordura suína, através de reações transesterificação. Para todos esses biodieseis foram determinados o ponto de entupimento a frio, o ponto de fulgor e o perfil cromatográfico. Estes biodieseis foram misturados com diesel de petróleo para se produzir misturas contendo 5% do biocombustível (B5), 10% (B10) e 20% (B20), e os ensaios citados foram realizados nestas amostras. Visando a diminuição do ponto de entupimento a frio, alguns aditivos naturais foram testados e se mostraram eficientes. Por exemplo, o limoneno reduziu o ponto de entupimento do biodiesel de óleo soja em mais de 7°C. No biodiesel de gordura suína a redução foi de 10°C, o que significa o ponto de entupimento a frio em temperatura inferior a 13°C. Os aditivos utilizados são solúveis nos biodieseis estudados e, também, nas misturas diesel-biodiesel, pelo menos nas concentrações testadas. Como importante exemplo de abaixamento do ponto de entupimento a frio das misturas diesel-biodiesel de gordura suína com 10% de biodiesel (B10), podese citar o caso da terebentina que provocou uma redução de aproximadamente 8°C (de 12,7ºC para 5,0°C). Este mesmo aditivo caus ou uma redução de 13,6 ºC (de 20,3ºC para 6,7ºC), na mistura diesel-biodiesel de gordura suína com 20% de biodiesel (B20). Este resultado é muito significativo por implicar na possibilidade de usar este tipo de combustível mesmo em regiões mais ao sul do país durante o inverno
Abstract: The present studies were performed preparing biodiesel from soya, canola, corn, sunflower oils and the fat swine, through transesterification reaction. The biodiesel produced from these oils were studied for: cold filter plugging point, flash point and for chromatographic analysis. The biodiesels were mixed with diesel to produce blends containing 5% of the biofuel (B5), 10% (B10) and 20% (B20), and these samples were also analyzed by the same techniques as discussed earlier. In order to decrease the cold filter plugging point, some natural additives have been tested and were proved effectively. For example, limonene caused more than 7°C reduction in the cold filter plugging point of soybean biodiesel. In the biodiesel obtained from the swine fats, the reduction was found around 10°C and less than 13°C for the cold filter plugging point. The additives are soluble in studied biodiesels and also in the dieselbiodiesel blends, at least, in the concentrations tested. One of the important example of the reduction in the cold filter plugging point of diesel-biodiesel blends of swine fats with 10% biodiesel (B10), using turpentine as additive which caused reduction of approximately 8°C (from 12,7ºC up to 5,0°C). The same additive caused a reduction of 13,6 ºC (from 20.3 ºC up to 6.7 °C) in the cold filter plugging point of diesel -biodiesel blends of swine fats with 20% biodiesel (B20). This result is very significant because it is possible to use this type of fuel in south regions of the country during the winter
Doutorado
Quimica Analitica
Doutor em Ciências
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Balingit, JoAnn Alegre. "Internet plagiarism as flash point and folklore / do high school students plagiarize more from Internet sources than from print-based sources?" Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 144 p, 2008. http://proquest.umi.com/pqdweb?did=1654487881&sid=3&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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Dorighello, Carareto Natalia Daniele. "Equilibre solide-liquide et point d'éclair de mélanges de corps gras." Thesis, Pau, 2014. http://www.theses.fr/2014PAUU3048.

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L’étude des propriétés physico-chimiques des matières grasses constitue une demande mondiale croissante liée à l’augmentation constante de leur utilisation comme source d'énergie et pour l'alimentation. Une bonne connaissance de leurs propriétés thermophysiques et de leur comportement de phases est nécessaire pour la production, l'utilisation efficace de ces matières grasses et le développement des processus d'extraction au niveau du raffinage et du stockage. Des données d'équilibre solide-liquide peuvent être utilisées pour améliorer les procédés existants, et également pour le développement des nouveaux procédés de séparation. Ainsi, le point d'éclair est une propriété importante qui doit être observée pendant le stockage, le transport et la production de composés inflammables, tels que le biodiesel. Ce travail vise à étudier l'équilibre solide-liquide de mélanges binaires constitués d'alcools gras, d’acides gras et d’esters éthyliques. Il porte aussi sur l'évaluation du point d’éclair de mélanges d'esters éthyliques, constituants majoritaires du biodiesel, et de l'éthanol, présent à des niveaux résiduels dans le biodiesel. Les points d’éclair des esters éthyliques mais également des mélanges binaires d'esters éthyliques et d’éthanol, ont été déterminés expérimentalement. Un modèle empirique de prédiction des points d’éclair des biodiesels en fonction de leur composition et de leur teneur en éthanol a été proposé. Les diagrammes de phases solide-liquide des mélanges binaires d'alcool gras + alcool gras ou d’alcools gras + acide gras ont été déterminés expérimentalement par analyse calorimétrique différentielle (DSC). Cette étude permet de caractériser les réactions eutectique, péritectique et métatectique, en utilisant une vitesse de chauffe linéaire ou une méthode de Stepscan DSC. Des mesures de diffraction rayons X et de microscopie optique de contrôle de la température ont été appliquées pour compléter la compréhension des diagrammes de phases. L'effet de la pression sur l'équilibre solide-liquide a aussi été mesuré pour les mélanges binaires d’esters éthyliques ou d'alcools gras en utilisant un microscope optique couplé à une cellule à haute pression qui permet d’augmenter la pression jusqu'à 80 MPa sur une large gamme de température. Les modèles thermodynamiques Margules 2 et 3-suffix et NRTL ont été utilisés pour décrire la ligne du liquidus des systèmes présentant un point péritectique, alors qu’un modèle thermodynamique prédictif a permis de modéliser l'ESL en fonction de la pression. Dans les deux cas, on a observé un ajustement satisfaisant par rapport aux données expérimentales
The study on the physicochemical properties of fatty materials has acquired a growing importance, mainly due to the incentive of their use in energy and nutrition. The efficient production and use of fatty compounds requires a good knowledge of their properties and phase behavior that are necessary for development of processes, especially in production steps such as extraction and refining, but also during storage of the final products. Solid-liquid equilibrium data can be used to improve or propose new separation processes. Also the flash point is an important property that must be considered during storage, transportation and production of flammable compounds, such as biodiesel. This work aimed to study the solid-liquid equilibrium of binary mixtures consisting of fatty alcohols, fatty esters or fatty acids, and to evaluate the flash point of mixtures of ethyl esters, the major constituents of biodiesels, and ethanol, also present in biodiesel in residual levels. Flash points of ethyl esters, and also of the binary mixtures of ethyl esters with ethanol were determined experimentally. An empirical model for predicting the flash point of biodiesels as a function of composition and ethanol content was proposed. The solid-liquid phase diagrams of binary mixtures of fatty alcohol + fatty alcohol or fatty alcohols + fatty acid were determined experimentally by differential scanning calorimetry (DSC), using a linear heating rate, or by a stepscan DSC method, with the aim of investigating the occurrence of the eutectic, peritectic and metatectic reactions. X-ray diffraction and optical microscopy with temperature control techniques were applied to complement the understanding of the phase diagrams. The effect of pressure on the solid-liquid equilibrium was investigated for the binary mixtures of ethyl esters or fatty alcohols using an optical microscope coupled to a high pressure cell which allows the pressure increase up to 80 MPa. Margules 2 and 3-suffix and NRTL thermodynamic models were used for describing the liquidus line of the systems that presented peritectic point, and a predictive thermodynamic model was used to model the ESL function of pressure, which in both cases, gave a satisfactory fit compared to the experimental data
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Fregolente, Lernardo Vasconcelos 1980. "Aplicação de planejamento de experimentos em diferentes etapas do refino de petroleo." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266397.

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Orientador: Maria Regina Wolf Maciel
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica
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Resumo: Neste trabalho, a técnica de planejamento de experimentos foi aplicada em diferentes estudos de otimização realizados na Refinaria de Paulínia (Replan). O trabalho abrange aplicações da técnica em escala laboratorial, em ferramenta computacional, até a utilização da técnica em diferentes plantas industriais. Os estudos de laboratórios consistiram na avaliação da dependência da lubricidade do diesel metropolitano em relação à sua composição e no desenvolvimento de uma nova metodologia para determinação do ponto de fulgor de frações leves de petróleo. Através de planejamentos fatoriais aplicados a um simulador do processo de coqueamento retardado (denominado DC-SIM), foram geradas equações polinomiais simples para a previsão de rendimentos dos produtos da unidade em sua etapa reacional. Utilizando estas equações, curvas de nível foram obtidas, as quais auxiliam na análise do comportamento da unidade frente a modificações nas condições de operação. Duas aplicações consistiram na realização de testes em plantas industriais. Primeiramente, utilizando planejamentos em dois níveis, foram levantados novos modelos para o controle avançado de uma torre de fracionamento de naftas através da realização de testes de identificação utilizando perturbações em degrau. A metodologia de planejamento de experimentos possibilitou uma análise multivariável do sistema. Finalmente, foram realizados experimentos seguindo planejamentos com configuração estrela para a maximização da recuperação de moléculas na faixa de destilação do GLP nas áreas de fracionamento de gases das duas unidades de coqueamento retardado da Replan. Por se tratar da maior refinaria de petróleo do país, sendo responsável por cerca de 20% da capacidade de refino no Brasil, a utilização de planejamentos fatoriais foi de fundamental importância para a viabilização de alguns testes em planta, já que reduz significativamente o número de experimentos necessários quando comparada à metodologia de avaliação de um fator por vez. Desta forma, o impacto dos testes na produção de derivados foi minimizado. Além disso, os resultados obtidos propiciaram um ganho econômico expressivo para a refinaria.
Abstract: In this work, experimental design technique was applied to different optimization studies, which were carried out in the Paulínia Refinery (Replan). The work covers applications of the technique in laboratorial scale, in computational tool, and the use of the technique in different industrial plants. The laboratory studies consisted in the evaluation of the dependence of the metropolitan diesel oil lubricity in relation to its composition and in the development of a new methodology to determine the flash point of light fractions of petroleum. Through factorial designs applied to a delayed coke simulator (named DC-SIM), simple polynomial equations were generated to predict the products yields of the unit in the reaction step. Using these equations, contour plots were obtained, which helped the analysis of the process response due to changes in the operating conditions. Two applications were done in industrial plants. First, using two level factorial designs, new models were adjusted to be used in the advanced control of a naphtha fractionation tower. The identification tests were carried out giving step disturbance in the manipulated variables. The experimental design methodology allowed a multivariable analysis of the system. Finally, experiments were done according to star configuration factorial designs in order to maximize the recovery of LPG molecules in the gases fractionating units of two delayed coke plants of Replan. Since Replan is the biggest oil refinery in Brazil, responsible for 20% of the national refining capacity, the use of factorial designs had a fundamental importance to allow the running of some tests in the plant. It reduces significantly the number of experiments, when it is compared to univariate methodology. Therefore, the impact of the tests in the production was minimized. Furthermore, the results provided very expressive financial earns
Doutorado
Desenvolvimento de Processos Químicos
Doutor em Engenharia Química
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Silveira, Eva Lúcia Cardoso 1981. "Desenvolvimento de novas propostas para análise de bioesel e estudo da relação entre ponto de fulgor e o teor de álcool reiduol." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/248838.

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Orientador: Matthieu Tubino
Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Química
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Resumo: Um método de baixo custo é proposto neste trabalho para a análise quantitativa do álcool residual em biodiesel através da determinação do ponto de fulgor. Foram analisados ésteres metílicos obtidos de óleos de soja, milho, girassol e de sebo bovino. Os ésteres etílicos foram obtidos de óleo de soja. Em todos os casos ficou evidente que há uma correlação entre o ponto de fulgor e o teor de álcool residual no biodiesel. Assim, o parâmetro ponto de fulgor pode ser usado diretamente para determinar o teor de álcool residual do biodiesel. Foi proposto também um método para a determinação de fósforo em biodiesel por espectrofotometria de absorção molecular UV-Vis. As amostras de biodiesel são mineralizadas por calcinação a 550 °C seguindo dissolução do resíduo em H2SO4 1,0 mol L. O procedimento analítico é baseado na formação do complexo azul de molibdênio. Empregou-se o ácido 1-amino-2-naftol-4-sulfônico como agente redutor. O método foi aplicado para amostras de biodiesel de soja, canola, girassol e de sebo bovino. Os limites de detecção e quantificação obtidos para fósforo foram de 0,57 mg kg e 1,71 mg kg, respectivamente. O desvio padrão relativo médio obtido foi cerca de 5 %. A simplicidade do procedimento adicionado à precisão, exatidão e o baixo custo indicam que é uma excelente opção para a determinação de fósforo em biodiesel. Um terceiro método, neste caso, para a determinação de ânions em biodiesel baseado na extração com água assistida por ultrassom também foi desenvolvido neste trabalho. Os extratos obtidos das amostras de biodiesel foram analisados por cromatografia de íons. Os limites de quantificação foram 0,97; 4,10; 0,30; 2,47 e 0,26 mg kg para acetato, formiato, cloreto, fosfato e sulfato, respectivamente. A técnica de cromatografia de íons mostrou-se viável para a separação e quantificação de ânions orgânicos e inorgânicos em biodiesel simultaneamente diminuindo assim o tempo de análise
Abstract: A low cost method is proposed in this work for the quantitative analysis of residual alcohol in biodiesel through determination of the flash point. We analyzed methyl esters obtained from oils such as soy, corn, sunflower and of bovine fat. The ethyl esters were obtained from soy oil. In all cases it became very evident that there is a correlation between the flash point and the residual alcohol content in the biodiesel. Therefore the parameter flash point can be used to directly determine the residual alcohol content of biodiesel. A method has been proposed for the determination of phosphorus in biodiesel by UV-vis molecular absorption spectrophotometry. The biodiesel samples are mineralized using an ashing procedure at 550 °C following dissolution of the residue in 1.0 mol L H2SO4. The analytical procedure is based on the formation of a blue molybdenum complex. 1-amino-2naphthol-4-sulfonic acid is used as reducing agent. The method was applied to biodiesel samples of soy, canola and sunflower oils and of bovine fat. The limits of detection and quantification are 0.57 mg kg and 1.71 mg kg, respectively. The average standard deviation obtained was about 5 %. The simplicity of the procedure added to its precision, accuracy and low cost indicate that it is an excellent option for the determination of phosphorus in biodiesel. A third method, in this case, for the determination of anions in biodiesel based on extraction with ultrasound assisted water has also been developed in this study. The extracts of biodiesel samples were analyzed by ion chromatography. The limits of quantification obtained were 0.97, 4.10, 0.30, 2.47 and 0.26 mg kg for acetate, formate, chloride, phosphate and sulfate, respectively. The technique of ion chromatography proved to be feasible for the simultaneously separation and quantification of organic anions in biodiesel, thereby reducing analysis time
Doutorado
Quimica Analitica
Doutora em Ciências
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Books on the topic "Flash point"

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Aellen, Richard. Flash point. London: Warner, 1993.

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Croucher, Matt. Flash point. London: Arrow Books, 2010.

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Shura, Mary Francis. Flash point. New York, N.Y: Dodd, Mead, 1987.

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Hingle, Metsy. Flash point. Ontario: MIRA, 2003.

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Hudson, James W. Flash point. Sydney, NSW: HarperCollins, 2000.

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Hingle, Metsy. Flash point. Don Mills, Ont: MIRA, 2003.

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John, Sally. Flash point. Eugene, Or: Harvest House Publishers, 2004.

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Huston, James W. Flash point. New York, NY: Harper Collins, 2001.

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Paul, Adam. Flash point. Leicester: Charnwood, 2003.

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Kress, Nancy. Flash point: A novel. New York, N.Y: Viking, 2012.

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Book chapters on the topic "Flash point"

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Gooch, Jan W. "Flash Point." In Encyclopedic Dictionary of Polymers, 310. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_5038.

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Wu, Huaqiang, Yan Liao, Bin Gao, Debanjan Jana, and He Qian. "RRAM Cross-Point Arrays." In 3D Flash Memories, 223–60. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-017-7512-0_8.

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Weik, Martin H. "infrared point-source flash detector." In Computer Science and Communications Dictionary, 781. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_8984.

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Ganguly, Sumit. "The Flash-Point of South Asia: Kashmir in Indo-Pakistani Relations." In The Post-Colonial States of South Asia, 311–25. New York: Palgrave Macmillan US, 2001. http://dx.doi.org/10.1007/978-1-137-11508-9_15.

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Gooch, Jan W. "Flash Points." In Encyclopedic Dictionary of Polymers, 310. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_5039.

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Stephenson, Richard M. "Flash Points." In Flash Points of Organic and Organometallic Compounds, 1–295. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-011-6067-4_1.

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Hooge, J. D. "Points, Lines, and Movement." In Fresh Flash, 131–55. Berkeley, CA: Apress, 2002. http://dx.doi.org/10.1007/978-1-4302-5163-7_6.

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Wang, Jinliang, and Chuanfu Zhang. "Analysis of Influence Factors on the Melting Point of the Freeze Slag Inside Flash Smelting Furnace Brickless Reaction Shaft." In 3rd International Symposium on High-Temperature Metallurgical Processing, 211–17. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118364987.ch26.

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Nitsche, M., and R. Gbadamosi. "Equilibria, Bubble Points, Dewpoints, Flash Calculations, and Activity Coefficients." In Practical Column Design Guide, 39–83. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-51688-2_2.

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Belfodil, Adnene, Sylvie Cazalens, Philippe Lamarre, and Marc Plantevit. "Flash Points: Discovering Exceptional Pairwise Behaviors in Vote or Rating Data." In Machine Learning and Knowledge Discovery in Databases, 442–58. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-71246-8_27.

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Conference papers on the topic "Flash point"

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Skrinska, Maria, Jan Skrinsky, Petr Dolnicek, Petra Lukesova, and Jan Marek. "Flash-Point Prediction for Industrial Applications." In 2014 International Conference on Mathematics and Computers in Sciences and in Industry (MCSI). IEEE, 2014. http://dx.doi.org/10.1109/mcsi.2014.55.

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Zhou, Yucai, Wang Liu, Yining He, and Xin Liu. "Design of Flash Point and Ignition Point Virtual Teaching System." In 2019 International Conference on Virtual Reality and Intelligent Systems (ICVRIS). IEEE, 2019. http://dx.doi.org/10.1109/icvris.2019.00010.

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Kay, Peter J., Andrew P. Crayford, Philip J. Bowen, and James Luxford. "Flammability of High Flash Point Liquid Fuels." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-69536.

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Current European Health and Safety Legislation was implemented to limit the chance of a serious explosion occurring in the workplace by highlighting potentially explosive atmospheres and ensuring that ignition sources are not present in these areas. Though hazardous area classification for gaseous and dust explosion hazards are well established, the same cannot be said for mists especially for high flash point liquids. However, a recent literature review of a range of (some fatal) incidents has shown that mist explosions are more common and the consequences more severe than previously anticipated. This work is, for example, applicable to the safe use of fuels and lubricants utilised in the gas turbine power generation and propulsion industries. Previous studies of jet breakup regimes and idealised flammability studies have indicated that low pressure releases (<10 bar) of low volatility fuels may still give rise to combustion hazards. Impingement of accidental releases onto surfaces has been shown to exacerbate the potential hazard, or broaden the range of hazardous release conditions. However, although a theoretical case can be made for generating flammable environments under moderate release conditions, very little evidence has been provided to bridge the gap between ‘idealised’ studies and full-scale incidents. The aim of this first programme of work is to start the process of bridging this gap, leading to well founded safety guidance. The test programme was conducted in a custom built spray chamber located in the Gas Turbine Research Centre (GTRC) of Cardiff University. The fuel was released at a predefined range of pressures of industrial relevance at atmospheric temperature. Igniters were positioned at three downstream locations and the continuous electrical discharge had an energy no greater than 4 mJ. Tests were conducted for ‘free sprays’ where the spray was directed along the length of the chamber, and for impinging sprays where the spray was aligned to impinge normal to a flat un-heated surface. Gas oil (flash point > 61 °C) ignited as a free jet at a working pressure consistent with previous hypotheses. However, when the jet impinged on a solid surface then the resulting spray could be ignited at considerably lower delivery pressures. Although the impingement process is complex, the data will be discussed in light of contemporary models that predict initial jet/spray characteristics along with post-impingement characteristics. This paper presents a first step towards consolidating previous studies and improving future safety guidelines concerned with the risk posed by the flammability of accidental releases of pressurised high flashpoint fuels.
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Infanger, Franz. "The introduction of high flash point varnishes." In 1985 EIC 17th Electrical/Electronics Insulation Conference. IEEE, 1985. http://dx.doi.org/10.1109/eic.1985.7458621.

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Zheng, Yuankai, Kebin Li, Jinjun Qiu, Zaibing Guo, Guchang Han, Ping Luo, Lihua An, et al. "High density Flash-like cross-point MRAM." In 2006 8th International Conference on Solid-State and Integrated Circuit Technology Proceedings. IEEE, 2006. http://dx.doi.org/10.1109/icsict.2006.306477.

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Arankalle, A. R., V. G. Kenjale, M. K. Chaudhari, and B. Bhanot. "Significance Of Flash Point in Diesel Fuel Specification." In SIAT 2004. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2004. http://dx.doi.org/10.4271/2004-28-0078.

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"The Special Flash Point Behavior of Binary Aqueous–Organic Mixtures with Flash Point of the Flammable Close to and less than 100oc." In Annual International Conference on Chemical Processes, Ecology & Environmental Engineering. International Academy of Engineers, 2016. http://dx.doi.org/10.15242/iae.iae0416408.

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Stoyle, P. "Flash and persistent point scatterer feature extraction from radar images." In IET Seminar on High Resolution Imaging and Target Classification. IEE, 2006. http://dx.doi.org/10.1049/ic:20060076.

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Craig, R., I. Gravseth, R. P. Earhart, J. Bladt, S. Barnhill, L. Ruppert, and C. Centamore. "Processing 3D flash LADAR point-clouds in real-time for flight applications." In Defense and Security Symposium, edited by Richard T. Howard and Robert D. Richards. SPIE, 2007. http://dx.doi.org/10.1117/12.720143.

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Gillingham, Peter, Jin-Ki Kim, Roland Schuetz, Hong-Beom Pyeon, HakJune Oh, Don Macdonald, Eric Choi, and David Chinn. "A 256Gb NAND Flash Memory Stack with 300MB/s HLNAND Interface Chip for Point-to-Point Ring Topology." In 2011 3rd IEEE International Memory Workshop (IMW). IEEE, 2011. http://dx.doi.org/10.1109/imw.2011.5873241.

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Reports on the topic "Flash point"

1

Wilson, III, and George R. Flash Point Performance Evaluation. Fort Belvoir, VA: Defense Technical Information Center, March 2014. http://dx.doi.org/10.21236/ada601268.

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WALKER, DARREL. FLASH POINT OF CSSX SOLVENT. Office of Scientific and Technical Information (OSTI), March 2006. http://dx.doi.org/10.2172/882726.

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Lee, S. W. Some critical aspects of the use of high flash point residential fuel oils. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1992. http://dx.doi.org/10.4095/304543.

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Lavoie, Kenneth E. Can Water Extinguish the Flash Points of the Middle East. Fort Belvoir, VA: Defense Technical Information Center, April 1996. http://dx.doi.org/10.21236/ada388375.

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