Relevant bibliographies by topics / Pentanone

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Pentanone'

Author: Grafiati
Published: 5 June 2025
Last updated: 8 July 2025

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Journal articles on the topic "Pentanone"

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Walker, Valerie, and Graham A. Mills. "2-Pentanone Production from Hexanoic Acid byPenicillium roquefortifrom Blue Cheese: Is This the Pathway Used in Humans?" Scientific World Journal 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/215783.

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Production of 2-pentanone, a methylketone, is increased in fasting ketotic humans. Its origin is unknown. We hypothesised that it is formed viaβ-oxidation of hexanoic acid by the peroxisomal pathway proposed for methylketone-producing fungi and yeasts. We usedPenicillium roqueforticultured on fat (margarine) to investigate 2-pentanone production. Headspace gas of incubates of the mould with a range of substrates was analysed using solid-phase microextraction with gas chromatography-mass spectrometry. Consistent with the proposed pathway, 2-pentanone was formed from hexanoic acid, hexanoyl-CoA, hexanoylcarnitine, and ethyl-3-oxohexanoic acid but not from ethylhexanoic, 2-ethylhexanoic, octanoic, or myristic acids, octanoylcarnitine, or pentane. However, the products from deuterated (D) hexanoic-D11acid and hexanoic-2, 2-D2acid were 9D- and 2D-2-pentanone, respectively, and not 8D- and 1D-2-pentanone as predicted. When incubated under18O2/14N2, there was only a very small enrichment of [16O2]- with [18O2]-containing 2-pentanone. These are new observations. They could be explained if hydrogen ions removed from hexanoyl-CoA by acyl-CoA oxidase at the commencement ofβ-oxidation were cycled through hydrogen peroxide and reentered the pathway through hydration of hexenoyl-CoA. This would protect other proteins from oxidative damage. Formation of 2-pentanone through aβ-oxidation cycle similar toPenicillium roquefortiwould be consistent with observations in humans.
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Kucharska, Małgorzata, and Anna Kilanowicz. "Pentan-1-ol i jego izomery: pentan-2-ol, pentan-3-ol,2-metylobutan-1-ol, 3-metylobutan-2-ol, 2-metylobutan-2-ol, 2,2-dimetylopropan-1-ol. Dokumentacja proponowanych dopuszczalnych wielkości narażenia zawodowego." Podstawy i Metody Oceny Środowiska Pracy 36, no. 3 (2020): 67–110. http://dx.doi.org/10.5604/01.3001.0014.3981.

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Pentanol to alifatyczny nasycony alkohol monohydroksylowy (C5H11OH), który ma osiem izomerów położeniowych. Cztery z nich są alkoholami I-rzędowymi, trzy – II-rzędowymi, jeden – III rzędowym. W normalnych warunkach pentanole (alkohole amylowe) są bezbarwnymi, łatwopalnymi cieczami, poza 2,2-dimetylopropan-1-olem, który jest krystalicznym ciałem stałym. Pary alkoholi mogą tworzyć mieszaniny wybuchowe z powietrzem. Alkohole pentylowe są stosowane jako rozpuszczalniki: lakierów, żywic, gum, a także w przetwórstwie tworzyw sztucznych i ropy naftowej. Służą również do produkcji syntetycznych środków aromatyzujących oraz jako surowce do produkcji preparatów farmaceutycznych. Główną drogą wchłaniania pentanoli w warunkach narażenia zawodowego są drogi oddechowe. Działają one drażniąco na: układ oddechowy, skórę i oczy zarówno u zwierząt, jak i u ludzi. U ludzi, szczególnie z nietolerancją na niższe alkohole (etanol), izomery pentanolu powodowały podrażnienie skóry. Narażenie zwierząt drogą dermalną przy długotrwałej aplikacji powodowało poważne podrażnienie z rumieniem, atonią, aż do martwicy. W organizmie izomery pentanolu mogą być utleniane lub sprzęgane z kwasem glukuronowym, przy czym alkohole I-rzędowe są metabolizowane głównie do odpowiednich aldehydów, a następnie kwasów, alkohole II-rzędowe są częściowo utleniane do odpowiednich ketonów, a w dużej części glukuronidowane, zaś alkohol III-rzędowy (2-metylo-2-butanol) nie może tworzyć aldehydu i ketonu, dlatego jest wydalany z moczem w niezmienionej postaci jako glukuronid. Mechanizm działania toksycznego pentanoli nie został jednak w pełni wyjaśniony. Na podstawie wyników badań na zwierzętach doświadczalnych wykazano, że krytycznym skutkiem narażenia na pentano-1-ol i jego izomery jest działanie drażniące. Wartość NDS dla pentanoli wyliczono z wartości RD50 wyznaczonej w badaniach na myszach, co daje wartość 75 mg/m3. W celu zabezpieczenia pracowników przed narażeniem na pikowe stężenia pentanoli zaproponowano wartość chwilową (NDSCh) na poziomie dwukrotnej wartości NDS, czyli 150 mg/m3. Nie ma podstaw merytorycznych do ustalenia dla pentano-1-olu i jego izomerów wartości dopuszczalnego stężenia w materiale biologicznym (DSB). Ze względu na działanie drażniące substancję oznakowano literą „I” (substancja o działaniu drażniącym). Zaproponowane wartości normatywów higienicznych powinny zabezpieczyć pracowników przed działaniem drażniącym pentano-1-olu i jego izomerów na oczy i błony śluzowe górnych dróg oddechowych, a z uwagi na to, że skutki układowe obserwowano przy narażeniu na znacznie większe stężenia/dawki, także przed działaniem układowym. Zakres tematyczny artykułu obejmuje zagadnienia zdrowia oraz bezpieczeństwa i higieny środowiska pracy będące przedmiotem badań z zakresu nauk o zdrowiu oraz inżynierii środowiska.
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Wang, Mingyuan, Gayan A. Abeykoon, Francisco J. Argüelles-Vivas, and Ryosuke Okuno. "Aqueous Solution of Ketone Solvent for Enhanced Water Imbibition in Fractured Carbonate Reservoirs." SPE Journal 25, no. 05 (2020): 2694–709. http://dx.doi.org/10.2118/200340-pa.

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Summary This paper presents four dynamic imbibition experiments using fractured limestone cores with aqueous solutions of 3-pentanone and a nonionic surfactant. Results of the dynamic imbibition experiments were analyzed by the material balance for components: oil, brine, and chemical (3-pentanone or surfactant). The analysis resulted in a quantitative evaluation of the imbibed fraction of the injected components (brine and chemical additives) and the relative contribution of these components to the oil displacement in the matrix. Results show that 3-pentanone and surfactant both can enhance the imbibition of brine through wettability alteration; however, 3-pentanone is more efficient in transferring from a fracture to the surrounding matrix. The imbibed fraction was more than 57.0% for 3-pentanone, and only 6.0% for surfactant at the end of the chemical-slug stage. During injection of the 3-pentanone solution, brine and 3-pentanone both displaced oil from the matrix pore volume (PV). Results of the material-balance analysis suggest that an optimal process with an aqueous wettability modifier will have a large imbibed fraction to rapidly enhance the oil displacement by brine in the matrix. Such a process will benefit from chase brine and soaking (or shut-in) so that the oil recovery can be maximized for a small amount of chemical injection.
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Klein, Birgit, Hermann Schildknecht, Monika Hilker, and Siegfried Bombosch. "Oviposition Deterrent from Larval Frass of Spodoptera littoralis (Boisd.)." Zeitschrift für Naturforschung C 45, no. 7-8 (1990): 895–901. http://dx.doi.org/10.1515/znc-1990-7-823.

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Abstract A synthetic mixture containing 1-indanone, 2-pentanone, 2-methyl-3-pentanone, 3-mcthyl- 2-pentanone, 2-methylcyclopentanone. 1-hydroxy-propanone. acetophenone, benzaldehyde. n-nonanal, n-decanal, nerolidol, eugenol, thymol, carvacrol and phythol deters oviposition of the Egyptian cotton leaf worm, Spodoptera littoralis (Boisd.). All compounds were identified from larval frass of S. littoralis.
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González, Juan Antonio. "Thermodynamics of mixtures containing the CO and OH groups. I. Estimation of the DISQUAC interchange coefficients for 1-alkanol + n-alkanone systems." Canadian Journal of Chemistry 75, no. 10 (1997): 1412–23. http://dx.doi.org/10.1139/v97-170.

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1-Alkanol + n-alkanone mixtures are treated in terms of the DISQUAC group contribution model, reporting the interaction parameters for hydroxyl–carbonyl contacts. The quasichemical interchange coefficients are independent of the compounds in the mixture; the dispersive interchange coefficients depend on the intramolecular environment of the hydroxyl and (or) carbonyl groups. Mixtures of a given 1-alkanol with isomeric ketones are characterized by the same first dispersive interaction parameter, which is constant from 2-pentanone. This type of system, when including an alcohol up to 1-pentanol, needs different dispersive enthalpic parameters depending on the symmetry of the ketone. In this case, such parameters are constant from 2-pentanone or 3-pentanone. A detailed comparison is presented between DISQUAC results and data available in the literature on vapour–liquid equilibria, VLE (including azeotropic data), molar Gibbs energies, GE, molar excess enthalpies, HE, solid–liquid equilibria, SLE, natural logarithms of activity coefficients, In [Formula: see text] and partial molar excess enthalpies at infinite dilution,[Formula: see text]. For 54 systems, the mean relative standard deviation in pressure is 0.018; for 61 systems, this magnitude in the case of the HE is 0.059. It is noteworthy that the model yields good predictions over a very wide range of temperature for VLE and SLE. HE is also reasonably well represented at different temperatures. Larger discrepancies are encountered, as usual, for partial molar quantities at infinite dilution. Keywords: liquids, mixtures, thermodynamic properties, group contributions.
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Dowd, Paul, and Yi Hyon Paik. "Dimethylenebicyclo[1.1.1]pentanone." Tetrahedron Letters 27, no. 25 (1986): 2813–16. http://dx.doi.org/10.1016/s0040-4039(00)84649-3.

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Menaut, Consolación P., José M. Pico, Josefa Fernández, José L. Legido, and M. Inmaculada Paz Andrade. "Measurements and analysis of the excess enthalpies of some dichloroalkane + 2-ketone systems using UNIFAC group-contribution model." Canadian Journal of Chemistry 72, no. 2 (1994): 304–7. http://dx.doi.org/10.1139/v94-047.

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Experimental excess molar enthalpies hE at 298.15 K and normal atmospheric pressure were obtained for the binary mixtures 1,2-dichloropropane + (2-propanone, 2-butanone, or 2-pentanone), 1,3-dichloropropane + (2-butanone or 2-pentanone), 1,4-dichlorobutane + (2-butanone or 2-pentanone) using a Calvet microcalorimeter. The hE values for all the mixtures were negative. The experimental results used to test the capability of the interaction parameters of two versions of the UNIFAC group-contribution model to predict the proximity effect in these kind of mixtures.
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Mitsuhashi, Takao, and Yoshio Kaneda. "Gas Chromatographic Determination of Total Iodine in Foods." Journal of AOAC INTERNATIONAL 73, no. 5 (1990): 790–92. http://dx.doi.org/10.1093/jaoac/73.5.790.

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Abstract A gas chromatographic (GC) method has been developed for determination of total Iodine In foods, based on the reaction of Iodine with 3-pentanone. Organic matter of a sample is destroyed by an alkaline ashing technique. Iodide In a water extract of the ash residue is oxidized to free Iodine by adding dlchromate in the presence of sulfuric acid. Liberated Iodine Is reacted with 3-pentanone to form 2-lodo-3-pentanone, extracted Into n-hexane, and then determined by gas chromatography with an electron-capture detector. Recoveries of Iodide from spiked food samples ranged from 91.4 to 99.6%. Detection limit for iodine Is 0.05 μg/g
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Xu, Lu-Feng, Shang Shan, Wen-Long Wang, and Shan-Heng Wang. "3-Pentanone 2,4-dinitrophenylhydrazone." Acta Crystallographica Section E Structure Reports Online 64, no. 7 (2008): o1229. http://dx.doi.org/10.1107/s1600536808016887.

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Dowd, Michael K., and Edwin D. Stevens. "Inclusion Complexes of Gossypol with 2-Pentanone, 3-Pentanone, and 2-Hexanone." Journal of Inclusion Phenomena and Macrocyclic Chemistry 51, no. 1-2 (2005): 65–71. http://dx.doi.org/10.1007/s10847-004-1817-6.

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Dissertations / Theses on the topic "Pentanone"

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Bellotti, Luca. "Studio della reazione di chetonizzazione di acidi carbossilici in fase gas." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14449/.

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Negli ultimi anni la ricerca di materie prime alternative a quelle di origine fossile ha assunto primaria importanza per l’industria chimica. Una classe di composti ottenibili da fonti rinnovabili sono gli acidi organici, per fermentazione di zuccheri o mediante fast pyrolisis di biomasse ligno-cellulosiche. Il bio-olio derivante da quest’ultimo processo, a causa della presenza degli acidi, richiede ulteriori lavorazioni per ridurne la corrosività ed aumentarne il potere calorifico. La chetonizzazione, reazione di condensazione di due molecole di acido a dare un chetone, una molecola di anidride carbonica e una di acqua, può consentire di rimuovere gli acidi carbossilici dal bio-olio trasformandoli in molecole, i chetoni, più adatte all’utilizzo come carburanti. Tale reazione è già impiegata commercialmente per la sintesi del 3-pentanone in fase gas e con catalisi eterogenea. In questo lavoro di tesi la chetonizzazione dell’acido propionico è stata studiata in fase gas su ossidi di alluminio, lantanio, zirconio e silicio e fosfati di alluminio, lantanio e zirconio. In questo modo è stato possibile valutare l’effetto dell’introduzione del fosforo in tali materiali. È stato dimostrato che i catalizzatori più attivi e selettivi sono gli ossidi metallici con caratteristiche anfotere. La reazione sui fosfati è stata studiata al variare della temperatura. Sul fosfato di alluminio si è eseguito uno studio di chetonizzazione incrociata con acido acetico e acido propionico: i risultati mostrano che il prodotto maggioritario è quello derivante dalla chetonizzazione incrociata (2-butanone).
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Modica, Vincent. "Développement d'une mesure quantitative de concentration d'espèces dopées par fluorescence induite par laser : application aux conditions moteur." Paris 6, 2006. http://www.theses.fr/2006PA066068.

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Rossow, Björn. "Processus photophysiques de molécules organiques fluorescentes et du kérosène applications aux foyers de combustion : applications aux foyers de combustion." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00980569.

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La métrologie laser basée sur l'analyse de la fluorescence de traceurs moléculaires est devenue l'un des outils clefs pour l'étude expérimentale de la dynamique des fluides réactifs. Une étude spectroscopique des propriétés photophysiques de fluorescence dans le domaine spectral UV-visible de plusieurs molécules fluorescentes appartenant aux cétones aliphatiques et aux aromatiques mono- et bicycliques a permis d'approfondir la compréhension de l'influence de la température, de la pression et de la concentration d'oxygène sur leur fluorescence. Les résultats expérimentaux obtenus ont ensuite permis le développement d'un modèle de simulation du rendement de fluorescence pour les espèces aromatiques (naphtalène et toluène), qui fournit des résultats très proches de ceux mesurés.De ces résultats, le développement de la technique d'imagerie de fluorescence (PLIF) sur la phase vapeur d'un carburant multi-composant a conduit à étendre cette analyse spectrale de fluorescence au cas du kérosène (Jet A-1). La comparaison entre les propriétés de fluorescence du kérosène et des traceurs aromatiques étudiés a notamment permis d'établir une stratégie de mesure de la concentration de la phase vapeur du kérosène dans des environnements où la teneur en oxygène est variable. Les signaux de fluorescence provenant des espèces mono- et di-aromatiques contenues dans le kérosène soulignent des évolutions différentes avec les conditions de température et teneur en oxygène. L'utilisation de filtres optiques appropriés associés à deux caméras ICCD permet alors une mesure bidimensionnelle de la température et de la concentration de kérosène en phase vapeur. La thèse débouche finalement sur l'application de cette technique PLIF-kérosène en combinaison avec la technique PLIF du radical OH en sortie d'un système d'injection industriel multi-point de nouvelle génération intégré dans une chambre de combustion haute pression.
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Schütte, Maya. "Chirale Organoarsenverbindungen für die Oxidationskatalyse." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=961931027.

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Tseng, Hsien-Chung Ph D. Massachusetts Institute of Technology. "Production of pentanol in metabolically engineered Escherichia coli." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/65767.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 149-160).<br>Public concerns about global warming and energy security contribute to an ever-increasing focus on biologically-derived fuels, leading to significant interest in several candidate molecules capable of complementing petroleum-derived fuel resources. Ethanol, one of the most developed biofuels, is used extensively as a gasoline additive. However, the high water miscibility of ethanol creates corrosion problems when transporting the fuel by pipelines. Furthermore, the low energy density of ethanol limits its fuel efficiency. Thus, it is important to explore alternative biofuels with properties that are more similar to conventional gasoline. With a higher energy density, enhanced physical properties that would allow better integration with current infrastructure, pentanol represents an excellent alternative, and has the potential to be a replacement for gasoline. The primary objective of my thesis work is to construct pentanol biosynthetic pathways in Escherichia coli, offering the possibility of producing pentanol from renewable carbon sources through microbial fermentations. We used butanol synthesis as a platform from which microbial synthesis of pentanol can be obtained. To explore the possibility of employing the butanol pathway enzymes for pentanol biosynthesis, we implemented a bypass/feeding strategy to thoroughly evaluate the ability of those enzymes to act on five-carbon substrates. Additionally, by boosting the intracellular NADH availability, we achieved up to 85 mg/L pentanol from glucose and propionate, providing an initial proof-of-concept of a functional and feasible pentanol biosynthetic pathway in E. coli. Furthermore, a platform pathway was established for synthesis of value-added chiral 3-hydroxyalkanoic acids with applications ranging from chiral building blocks to high-value pharmaceuticals. Of significance, such pathway was constructed as one portion of the pentanol pathway, illustrating versatility of our pentanol pathway as it can be modularized for synthesis of various valuable chemicals. Altogether, our results suggest that direct microbial synthesis of pentanol solely from glucose or glycerol can be realized once an efficient redox balancing within the recombinant strains is ensured. As construction of desired biosynthetic pathways is just the first step toward economically viable pentanol production, increasing the titer, yield, and productivity will ultimately determine the feasibility of such pathways.<br>by Hsien-Chung Tseng.<br>Ph.D.
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Saengsawang, Oraphan, Andreas Schüring, Ton Dammers, David Newsome, Marc-Olivier Coppens, and Siegfried Fritzsche. "Diffusion of n-pentane in zeolite ZK5." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-193574.

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Saengsawang, Oraphan, Andreas Schüring, Ton Dammers, David Newsome, Marc-Olivier Coppens, and Siegfried Fritzsche. "Diffusion of n-pentane in zeolite ZK5." Diffusion fundamentals 6 (2007) 31, S. 1-2, 2007. https://ul.qucosa.de/id/qucosa%3A14206.

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Saengsawang, Oraphan, Pieter C. M. M. Magusin, Tawun Remsungnen, et al. "Rotational motion of n-Pentane in H-ZK5." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-195613.

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Saengsawang, Oraphan, Pieter C. M. M. Magusin, Tawun Remsungnen, et al. "Rotational motion of n-Pentane in H-ZK5." Diffusion fundamentals 2 (2005) 34, S. 1-2, 2005. https://ul.qucosa.de/id/qucosa%3A14364.

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Dário, Evandro Rodrigo. "Ebulição convectiva do n-pentano em um mini-canal anular." reponame:Repositório Institucional da UFSC, 2012. http://repositorio.ufsc.br/xmlui/handle/123456789/91730.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Mecânica, Florianópolis, 2008.<br>Made available in DSpace on 2012-10-24T01:56:35Z (GMT). No. of bitstreams: 1 274600.pdf: 2552864 bytes, checksum: b6d93b17b5b310d86ebd435b05b602dc (MD5)<br>No presente trabalho, é apresentado um estudo experimental sobre a transferência de calor e a queda de pressão no processo de ebulição convectiva em um mini-canal anular, utilizando como fluido refrigerante o n-Pentano, para pressões e temperaturas de entrada na seção de teste de 150,0 e 200,0 kPa, e 27,0 e 40,0 oC, respectivamente. Foram empregadas velocidades mássicas de até 337,8 kg/m2s, para fluxos de calor q < ou = 60,0 kW/m2. A seção de teste é formada por dois tubos, um interno de cobre onde é realizado o aquecimento, e outro externo de acrílico, montados concentricamente, com uma folga entre eles de 0,25 mm, formando assim um mini-canal anular de diâmetro hidráulico de 0,5 mm. O projeto e a construção de um circuito de ebulição convectiva e da seção de teste foram inteiramente desenvolvidos durante o presente trabalho de mestrado. São analisados os efeitos de velocidade mássica, de pressão, e da temperatura de entrada, e do fluxo de calor sobre o coeficiente de transferência de calor para a ebulição. Os dados experimentais para o coeficiente de transferência de calor foram comparados com as correlações de Kandlikar (1990), Liu e Winterton (1991), Warrier (2002), Lazarek e Black (1982) e Steiner e Taborek (1992). Os dados referentes à queda de pressão bifásica foram comparados com o modelo de fases separadas para três diferentes valores do parâmetro de Chisholm (C). Imagens fotográficas relativas ao processo de ebulição convectiva em um minicanal anular também são apresentadas e analisadas.<br>In this work, it is presented an experimental study of heat transfer of and the pressure drop in the process of convective boiling in an annular mini-channel, using as fluid refrigerant the n-Pentane, to pressures and temperatures of entry in the test section were 150,0 and 200,0 kPa, and 27,0 and 40,0 ° C, respectively. They were employed flux mass of up to 337,8 kg/m2s for heat flux q < ou = 60.0 kW/m2. The test section is composed of two tubes, one internal copper, where the heating is performed, and other external acrylic, mounted concentric, with a gap between them of 0,25 mm, thus forming an annular mini-channel of diameter hydraulic of 0,5 mm. The design and construction of a circuit of convective boiling in the test section were fully developed during the present work the Masters. We will be analyzed the effects of mass flux, pressure, and temperature input, and the heat flux on the heat transfer coefficients for boiling. Experimental data for the heat transfer coefficients were compared with the correlations of Kandlikar (1990), Liu and Winterton (1991), Warrier (2002), Lazarek and Black (1982) and Steiner and Taborek (1992). The data relating to the collapse of pressure two-phase flow are compared with the model of separate phases for three different parameter values of Chisholm (C). Photographic images relating to the process of convective boiling in a mini-channel annular are also presented and analyzed.
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Books on the topic "Pentanone"

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Mabiala, Bernard. Transfert de masse entre phases d'un mélange binaire méthane-pentane: Étude des phénomènes capillaires transitoires. A.N.R.T. Université Pierre Mendès France Grenoble 2, 1985.

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Engineering, Zaïre Trading and. Rapport de visite sur les sites des projets mini-sucreries: (Luiza, Luputa, Lubilashi, Mushie Pentane et Businga). ZTE, 1990.

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PENTANGLE. Pentangle. Transatlantic Records, 1987.

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Vaughn, Susan. Pentangle. Starlight Writer Publications, 2000.

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Vaughan, Susan H. ~R-Pentangle. Wings ePress, Inc., 2002.

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Vaughan, Susan H. ~R-Pentangle. Wings ePress, Inc., 2002.

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Corleonne, Edward. Golden Pentangle. Independently Published, 2020.

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Through the Pentangle: Where Calara Shimmerings Fly. Grosvenor House Publishing Limited, 2012.

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Pentane: A general guide to safe use in experimental, trial and production situations. ICI Polyurethanes., 1990.

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Murphy, Jessie. Keep Calm and Play Pentanque Calendar 2021: Bocce Ball Calendar 2021 Bocce Ball Calendar Planner Monthly Weekly Bocce Ball Appointment Planner 2021 Bocce Ball Appointment Book 2021. Independently Published, 2020.

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Book chapters on the topic "Pentanone"

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Howard, Philip H., Edward M. Michalenko, William M. Meylan, et al. "3-Pentanone." In Handbook of Environmental Fate and Exposure Data for Organic Chemicals, Volume IV. CRC Press, 2023. http://dx.doi.org/10.1201/9781003418887-74.

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Howard, Philip H. "4-Methoxy-4-methyl-2-pentanone." In Handbook of Environmental Fate and Exposure Data For Organic Chemicals, Volume V. CRC Press, 2024. http://dx.doi.org/10.1201/9781003575573-49.

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Howard, Philip H. "4-Hydroxy-4-methyl-2-pentanone." In Handbook of Environmental Fate and Exposure Data For Organic Chemicals, Volume V. CRC Press, 2024. http://dx.doi.org/10.1201/9781003575573-40.

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Wohlfarth, Ch. "Vapor-liquid equilibrium data of polyethylene in 3-pentanone." In Polymer Solutions. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-88057-8_197.

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Wohlfarth, Ch. "Vapor-liquid equilibrium data of polypropylene in 3-pentanone." In Polymer Solutions. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-88057-8_343.

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Wohlfarth, Ch. "Vapor-liquid equilibrium data of nitrocellulose in 2-pentanone." In Polymer Solutions. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-88057-8_35.

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Wohlfarth, Ch. "Vapor-liquid equilibrium data of polystyrene in 3-pentanone." In Polymer Solutions. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-88057-8_383.

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Wohlfarth, Ch. "pVT data of poly(dimethylsiloxane) in 4-methyl-2-pentanone." In Polymer Solutions. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-02890-8_39.

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Wohlfarth, Ch. "Vapor-liquid equilibrium data of poly(butyl methacrylate) in 3-pentanone." In Polymer Solutions. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-88057-8_111.

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Wohlfarth, Ch. "Vapor-liquid equilibrium data of nitrocellulose in 2,4-dimethyl-3-pentanone." In Polymer Solutions. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-88057-8_25.

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Conference papers on the topic "Pentanone"

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Zheng, Changluo, Pan Wang, Chengcheng Ao, Tong Yan та Lidong Zhang. "A Kinetic Study of H-Abstraction and Following Isomerization and β-Scission Reactions in 2-Pentanone Combustion". У 2024 IEEE 22nd International Conference on Industrial Informatics (INDIN). IEEE, 2024. https://doi.org/10.1109/indin58382.2024.10774224.

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Saari, Jussi, Antti Pitkäoja, Antti Uusitalo, Jouni Ritvanen, and Satu Lipiäinen. "ECONOMIC OPTIMIZATION OF A PENTANE EVAPORATOR FOR A MODERN HIGH-TEMPERATURE HEAT PUMP." In 37th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2024). ECOS 2024, 2024. http://dx.doi.org/10.52202/077185-0108.

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Abubakar, Yakubu Khartum, Binfa Bongfa, Elijah Binfa Bongfa, Muhammed Shaibu, and Ahmad Muhammad Zumami. "A Two-Parameter Computational Thermodynamic Analysis of Hydrogen-Impurity Mixtures in a Repurposed Pipeline." In Africa International Conference on Clean Energy and Energy Storage. Trans Tech Publications Ltd, 2025. https://doi.org/10.4028/p-u2mfmn.

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In this study, a two-parameter computational thermodynamic analysis of a hydrogen-impurity mixture in a repurposed pipeline was performed. The hydrogen purity is a vital aspect of the hydrogen value chain, and it is essential to constantly monitor its purity. We anticipate that refineries will use repurposed pipelines for bulk hydrogen transportation to consumers; however, these pipelines are known to contain impurities. Therefore, there is a need for such an analysis. This study considered two basic thermodynamic parameters: the pressure and gas molar concentration. The Peng–Robinson equation of state was used for the analysis. We implemented octave programming for the Newton-Raphson numerical scheme to obtain the molar volume of the pure hydrogen. Four scenarios were considered: scenario 1 (only hydrogen), scenario 2 (hydrogen mix with H2S), and scenario 3 (hydrogen mix with H2S, and pentane), and scenario 4 (hydrogen mix with H2S, pentane, and propane). We studied the variation in gas pressure with molar concentration. The results showed that, as the number of impurities considered in the analysis increased, the pressure decreased. The pressure of scenario 1 and 2 is approximately Pa, scenario 3 is around Pa, and scenario 4 is around Pa. We can develop a non-destructive acoustic emission hydrogen quality monitoring system by considering how impurities in hydrogen moving through a repurposed pipeline might affect the pressure of the gas moving through the pipeline.
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Chaloner-Gill, Benjamin, Amal Al-Borno, Martin Quintero та Moavin Islam. "Thermal Gradient (ΔT) Measurement of Insulating Systems for Cold Service Applications". У CONFERENCE 2023. AMPP, 2023. https://doi.org/10.5006/c2023-19201.

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Abstract This paper details the findings of a study conducted to evaluate the performance of a newly developed spray applied Insulation System (Ins-X) as well as an existing Composite Blanket Cladded Insulation System (Ins-Y) for cold service (cryogenic) applications such as that encountered in Pentane/LPG (liquified petroleum gas) storage. One of the options to assess the insulative property of candidate insulation system materials is to measure the thermal gradient or the temperature difference (ΔT) between the inner and outer surface of the insulated storage container. The lower the value of ΔT the better the quality of the insulation system. Currently there is no standard laboratory method to make such ΔT measurements under simulated field cryogenic conditions. For this study, a novel laboratory test technique and apparatus was developed to simulate low temperature cycling (-6.7, -12.2, -17.8 and -23°C) encountered in Pentane/LPG storage steel spheres. The ΔT between the cooled inner surface and the insulated outer surface of steel panels was measured at different thicknesses of the insulation systems and steel panel thicknesses of 1.91 and 2.54 cm. The new apparatus was found to provide an elegant and reproducible method of making ΔT measurements in the laboratory under simulated field conditions for assessing the quality and performance of insulation systems for cryogenic service.
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Jin, Peng, Winston Robbins, and Gheorghe Bota. "Mechanism of High Temperature Corrosion by Model Naphthenic Acids." In CORROSION 2016. NACE International, 2016. https://doi.org/10.5006/c2016-07302.

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Abstract Naphthenic acid (NAP) corrosion is one of the major concerns for corrosion engineers in refineries, particularly with the increasing acidity in “opportunity crudes”. However, complex compositions of NAP in crude oil make it difficult to evaluate accurately their corrosive behavior. In the present study, several model acids, including 4-phenylbutyric acid, 1-naphthoic acid, and 4-cyclohexyl pentanoic acid, have been tested in lab scale experiments previous applied to real crude fractions. Pretreatment/challenge protocol tests the corrosive behavior of the model acids under temperature and velocity ranges close to those encountered in refineries. This work demonstrates that the pretreatment of carbon steel and 9Cr-alloy with model acids yields iron oxide scales with different morphology and chemical composition as determined by Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). It is postulated that the formation of the iron oxide scale resulted from the decomposition of iron naphthenate on the surface at high temperatures.
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Janak, Kevin E., Steven Colby, Tre Bertrand, and Brittany Fontenot. "Development of an Asphaltene Deposit Cleaning Technology Using a QCMB Technique." In CORROSION 2019. NACE International, 2019. https://doi.org/10.5006/c2019-12821.

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Absrract Asphaltenes are a components of crude oil defined as a solubility class, i.e., as a component of crude oil insoluble in n-pentane (C5 asphaltenes) or n-heptane (C7 asphaltenes) but soluble in aromatic solvents such as toluene, and are complex, polyaromatic, macrocyclic structures with an overall varied composition. Asphaltene deposition, remediation, and inhibition are important considerations for flow assurance in upstream processes, but methodologies to assess performance for cleaning purposes can provide variable results. We report on the development of a dispersant additive for aromatic solvent systems using a QCMB technique for evaluating the cleaning of a deposit. Further, we report the performance of the additive in a case study and, hence, the utility of the technique to provide an assessment for potential field use.
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Farina, S. B., G. S. Duffo, and J. R. Galvele. "Stress Corrosion Cracking of Zirconium and Zircaloy-4 in Iodine Containing Solutions." In CORROSION 2002. NACE International, 2002. https://doi.org/10.5006/c2002-02436.

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Abstract The stress corrosion cracking (SCC) susceptibility of zirconium (UNS R60702) and one of its alloys, Zircaloy-4 (UNS R60804), was studied in 10 g/L iodine dissolved in various alcohols: methanol, ethanol, 1-propanol, 1-butanol, 1-pentanol and 1-octanol. SCC was observed in all the systems studied and the crack propagation rate was found to vary depending on the size of the solvent molecule. As the solvent molecular weight increased, the crack propagation rate decreased. Preceding crack propagation, intergranular attack was found in all the solutions tested. The intergranular corrosion rate also varied with the size of the solvent molecule. Since the corrosion rate of Zr single crystals was similar in all the solutions tested, it was concluded that the decrease in both the intergranular attack rate and the crack propagation rate was due to a steric effect, that hindered the access of the corrosive species to the tip of the crack. The surface mobility SCC mechanism accounts for the experimental observations made in the present work.
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Wang, Mingyuan, Gayan A. Abeykoon, Francisco J. Argüelles-Vivas, and Ryosuke Okuno. "Aqueous Solution of Ketone For Enhanced Water Imbibition in Shale Reservoirs." In SPE Europec featured at 82nd EAGE Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/205154-ms.

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Abstract This paper presents an experimental study of improved oil recovery from fractured shale cores by huff-n-puff of the aqueous solutions of 3-pentanone. The huff-n-puff experiments with different 3-pentanone concentrations were analyzed by the material balance for components: oil, brine, and 3-pentanone. Naturally sulfate-rich brine of low salinity was used as the injection brine. Results show that the 3-pentanone solution recovered more oil from the shale matrix than the injection brine alone. The oil recovery increased when the 3-pentanone concentration increased from 0.56-wt% to 2.85-wt%. Huff-n-puff with the 2.85-wt% 3-pentanone solution showed the highest improved oil recovery by 3-pentanone. However, the huff-n-puff experiment with the 1.07-wt% 3-pentanone solution showed the highest efficiency measured by the mass ratio of the produced oil to the injected 3-pentanone. That is, an optimal concentration of 3-pentanone appeared to exist. The material balance analysis showed that 3-pentanone was efficiently imbibed into the shale matrix, and that oil was recovered from shale mainly by the displacement by brine after the wettability alteration by 3-pentanone.
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Kleiner, Isabelle, Wolfgang Stahl, Ha Nguyen, and Maike Andresen. "MICROWAVE SPECTROSCOPY OF 2-PENTANONE." In 72nd International Symposium on Molecular Spectroscopy. University of Illinois at Urbana-Champaign, 2017. http://dx.doi.org/10.15278/isms.2017.ti07.

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Lawal, Tesleem, Abouzar Mirzaei-Paiaman, and Ryosuke Okuno. "Aqueous Ketone Solution for Wettability Alteration in High-Salinity-High-Temperature Carbonate Reservoirs." In SPE Improved Oil Recovery Conference. SPE, 2024. http://dx.doi.org/10.2118/218246-ms.

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Abstract Enhanced oil recovery (EOR) has been studied for high-salinity high-temperature (HSHT) carbonate reservoirs, but their thermodynamic conditions, brine chemistry, and petrophysical properties tend to pose various technical challenges for both gas- and chemical-based EOR. This paper presents an experimental study of aqueous solution of 3-pentanone for EOR in a carbonate reservoir with a brine salinity of 224,358 ppm at a reservoir temperature of 99°C. The short dialkyl ketone was previously studied as a sole additive to injection brine for rapid wettability alteration in oil-wet carbonate rocks without affecting the water/oil interfacial tension; however, it had not been tested under HSHT conditions. The main objective of this research was to investigate the impact of 3-pentanone on convective oil displacement in oil-wet carbonate rocks under HSHT conditions. First, aqueous stability was confirmed for mixtures of 3-pentanone and two brines: formation brine (FB) with a salinity of 224,358 ppm and injection brine (IB) with a salinity of 54,471 ppm at reservoir temperature. Quantitative proton nuclear magnetic resonance (1H NMR) analysis was used to determine the solubility of 3-pentanone in FB and IB. Spontaneous and forced imbibition experiments were conducted to assess imbibition enhancement in oil-aged Texas Cream carbonate cores by a solution of 3-pentanone in IB (3pIB) and compared with IB. Afterward, corefloods with oil-aged carbonate cores were performed by injecting IB followed by 3pIB as a tertiary flooding scenario and also by injecting only 3pIB as a secondary flooding scenario. Analysis of the spontaneous imbibition and coreflooding results was assisted by history-matched numerical models where capillary pressure and relative permeability curves were obtained. These data were further used to infer wettability alteration potential of 3-pentanone solution. Because of the markedly different solubilities of 3-pentanone in injection brine (1.1 wt%), formation brine (0.3 wt%), and oil (first-contact miscible), material balance analysis of corefloods was performed to understand the transport of 3-pentanone through varying salinities from injection brine (54,471 ppm) and resident brine (224,358 ppm) while being mixed with in-situ oil. Spontaneous and forced imbibition tests confirmed the wettability alteration of oil-aged carbonate rocks by 1.1-wt% 3pIB. This was further supported by the slope analysis of temporal recovery data as well as analyzing history-matched capillary pressure and relative permeability data. Coreflooding results showed increased oil production rate and reduced residual oil saturation by 3pIB. Relative permeability data, through Lak and modified Lak wettability indices, also indicated a wettability alteration toward more water-wetness by 3-pentanone solution.
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Reports on the topic "Pentanone"

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Morgan, Matthew Earle. Solubilization of pentanol by cationic surfactants and binary mixtures of cationic surfactants. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/10146350.

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Baxley, J. S., and J. R. Wells. The Hydroxyl Radical Reaction Rate Constant and Atmospheric Transformation Products of 2-Butanol and 2-Pentanol. Defense Technical Information Center, 1998. http://dx.doi.org/10.21236/ada380061.

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Lawler, J. 2,2,4,4-tetramethyl pentane (TMP) physical properties and safety considerations for use as a calorimeter fluid. Office of Scientific and Technical Information (OSTI), 1991. http://dx.doi.org/10.2172/5274561.

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Soucy, G., B. Farnand, and H. Sawatzky. Separation of dilute methanol, MTBE or TAME, 2-methyl-2-butene in pentane-toluene solutions by reverse osmosis. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/302586.

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Fieseler, Kelsey, and Timothy Jacobs. PR-457-14201-R04 Variable NG Composition Effects on LB 2SC Integral Engines. Pipeline Research Council International, Inc. (PRCI), 2018. http://dx.doi.org/10.55274/r0011525.

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The overall goal of this project is to improve upon existing engine control strategies of large bore, fuel-lean natural gas engines in order to increase efficiency and maintain emissions compliance during variable fuel composition events. This will be done by simulating the effects of variable fuels in a natural gas engine, and if necessary, develop engine control methods. Phase III builds upon the work of previous phases by implementing detailed cylinder-level geometry, increasing the number of alkane species in the laminar flame speed and ignition delay solutions, and incorporating a prechamber model into the full-scale engine simulation of a Cooper-Bessemer GMWH-10C. The piston motion and port profiles were calculated from known engine geometry as a way to simulate cylinder compression and expansion as well as cylinder scavenging. The species considered were increased from binary mixtures of methane and ethane to quinary mixtures of methane, ethane, propane, butane, and pentane in order to capture the effects of heavier hydrocarbons. The laminar flame speed and ignition delay equations were developed using the same method utilized in the previous phase, but the laminar flame speed was implemented differently. Two predictive combustion simulations were developed in GT-Power. The first simplifies the combustion chambers into just one open chamber. The second includes the actual cylinder volumes: two small prechambers attached to the main chambers. Both of these models were tuned and validated against experimental data.
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