Bibliografías temáticas / Toluene|sub

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Literatura académica sobre el tema "Toluene|sub"

Autor: Grafiati
Publicado: 2 de julio de 2021
Última modificación: 15 de febrero de 2022

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Artículos de revistas sobre el tema "Toluene|sub"

1

Cao, Xiao Qiang, Xian Jun Lv, Jun Qiu, Shu Gang Hu, Sheng Rong Liu y Xue Min Huang. "Catalytic Oxidation of Toluene over CuyMnzOx/γ-Al2O3 Catalysts". Advanced Materials Research 454 (enero de 2012): 7–10. http://dx.doi.org/10.4028/www.scientific.net/amr.454.7.

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Experimental investigations using granular activated carbon (GAC) adsorption and then desorpted with microwave irradiation for toluene abatement are reported in this paper. The results indicated that For different kinds of catalysts, Cu0.33Mn0.67Ox/γ-Al2O3 had the highest catalytic activity. For toluene combustion, the temperature required for 99% toluene conversion was lower than 300°C. In combination process of microwave desorption with catalytic combustion, the toluene conversion was ranged from 92% to 99% and the optimum volume flow rate ratio of carrier and air was 1:1.
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2

Mo, Shengpeng, Qi Zhang, Yuhai Sun, Mingyuan Zhang, Jiaqi Li, Quanming Ren, Mingli Fu, Junliang Wu, Limin Chen y Daiqi Ye. "Gaseous CO and toluene co-oxidation over monolithic core–shell Co3O4-based hetero-structured catalysts". Journal of Materials Chemistry A 7, n.º 27 (2019): 16197–210. http://dx.doi.org/10.1039/c9ta03750k.

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Gaseous CO co-existence could improve catalytic toluene oxidation over Co3O4-based catalysts, and the reaction mechanism on the CO/toluene oxidation may be mutually independent in the presence of both CO and toluene.
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3

Miki, Takeshi y Yutaka Tai. "Catalytic Oxidation of Toluene over Fe2O3/Al2O3 Catalyst". Materials Science Forum 695 (julio de 2011): 101–4. http://dx.doi.org/10.4028/www.scientific.net/msf.695.101.

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Fe2O3/Al2O3 catalyst was prepared and the catalytic oxidation of toluene over the catalyst was investigated. The catalyst was prepared by wet impregnation of commercial alumina support. The support was impregnated with an aqueous solution of iron nitrate. The wet support was dried and calcined at 600-800 °C. The catalytic property of the catalyst was measured by the light-off curve of CO2 yield. All these catalysts were active for total oxidation of toluene above 250 °C. The catalytic activity of catalyst calcined at 600 °C was better than those of catalysts calcined at 700 and 800 °C.
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4

Ren, Ai Ling, Dan Dan Zhang, Er Hong Duan, Bin Guo y Jian Zhong Chen. "pH of Toluene in [Bmim][BF4] and [Bmim][PF6] Ionic Liquids". Advanced Materials Research 393-395 (noviembre de 2011): 1328–33. http://dx.doi.org/10.4028/www.scientific.net/amr.393-395.1328.

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The pH value of binary mixtures containing toluene and 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]) and 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF4]) ionic liquids over the range of ionic liquids mole fraction (xIL) from (1.0 to 0.60) and temperature range from (293.15 to 340.65) K were measured. The range of the pH values of toluene and [Bmim][BF4] and [Bmim][PF6] were from (3.16 to 4.63) and (5.57 to 7.55), respectively. Comparison showed that the pH of toluene in the two ionic liquids was in sequence: [Bmim][BF4] < [Bmim][PF6]. The temperature dependency of the pH value was correlated using an empirical equation. The correlations gave satisfactory results.
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5

Ohkubo, Kei, Kensaku Hirose y Shunichi Fukuzumi. "Two-phase oxidation of toluene derivatives by dioxygen using the 3-cyano-1-decylquinolinium ion as a photocatalyst". RSC Advances 6, n.º 47 (2016): 41011–14. http://dx.doi.org/10.1039/c6ra05993g.

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The two-phase photocatalytic oxidation of toluene by O2 occurred efficiently using the 3-cyano-1-decylquinolinium ion in toluene with H2O to produce the oxygenated products in the organic phase and H2O2 in the aqueous phase.
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6

Cheng, Kai Yuan, Chen Yu Chang, Yung Hsu Hsieh, Kuo Shan Yao, Ta Chih Cheng y Chun Yang Cheng. "Catalytic Destruction and Removal of Toluene by Microwave/Fe3O4 System". Advanced Materials Research 47-50 (junio de 2008): 335–38. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.335.

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A microwave/Fe3O4 catalytic system was proposed for treatment of volatile organic carbons (VOCs). This system comprises a household microwave oven modified as the reaction chamber, which was fitted with a vertical, cylindrical quartz reactor comprising a catalytic packed column filled with granular Fe3O4, a microwave catalyst of iron (II, III) oxide. Experimental results showed that the destruction and removal efficiency (DRE) of toluene by microwave alone was close to zero, but with the microwave/Fe3O4 system, the temperature of the catalytic packed column increased rapidly and reached thermal balance within 10-15 min. Analysis of the rear gas after combustion showed that most of the toluene was thermal oxidized into CO2 and H2O. The successful application of the proposed microwave/Fe3O4 system to thermal destruction of toluene promises a new technology for treatment of VOCs.
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7

Su, Weitao, Honglei Dou, Jinwei Li, Dexuan Huo, Ning Dai y Li Yang. "Tuning photoluminescence of single-layer MoS2using H2O2". RSC Advances 5, n.º 101 (2015): 82924–29. http://dx.doi.org/10.1039/c5ra12450f.

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The PL intensity of 1L MoS2is greatly enhanced by physisorption of H2O2molecules that act as p-type dopants. By using toluene to form the sandwiched structure of H2O2/1L-MoS2/toluene, the PL intensity of 1L MoS2can be enhanced up to 27.4 times.
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8

Donnelly, Jane M., Frederik Lermyte, Juliusz A. Wolny, Marc Walker, Ben G. Breeze, Russell J. Needham, Christina S. Müller et al. "Cu(iii)–bis-thiolato complex forms an unusual mono-thiolato Cu(iii)–peroxido adduct". Chemical Communications 57, n.º 1 (2021): 69–72. http://dx.doi.org/10.1039/d0cc06921c.

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The square-planar complex [bis(toluene-3,4-dithiolato)copper(iii)][NEt3H], characterised by X-ray photoelectron spectroscopy and DFT, fragments in FTICR-MS to form [(toluene-3,4-dithiolato)Cu(iii)(peroxide)]− by reaction with O2.
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9

Chen, Yu-Wen y Der-Shing Lee. "Catalytic Combustion of Toluene on Pd/CeO2–TiO2 Catalysts". Journal of Nanoscience and Nanotechnology 13, n.º 3 (1 de marzo de 2013): 2171–78. http://dx.doi.org/10.1166/jnn.2013.6895.

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10

Yang, Yang, Si Hui Zhan, Xi Chao Gao, Shan Shan Yang, Guang Yuan Ren, Yi Li, Jing Jing y Hong Bing Yu. "Degradation of Toluene Using Modified TiO2 as Photocatalysts". Advanced Materials Research 669 (marzo de 2013): 7–18. http://dx.doi.org/10.4028/www.scientific.net/amr.669.7.

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Volatile organic compounds (VOCs), especially toluene as the typical indoor air pollutants, are toxic and environmentally persistent whose removal is undoubtedly becoming increasingly urgent matter over these years. Titania is one of the most promising photocatalysts for the degradation of organic compounds, whereas the large band gap of titania and massive recombination of photogenerated charge carriers limit its overall photocatalytic effciency. These defects can be tackled by modifying the electronic band structure of titania including various strategies like metal deposition, non-metal atoms substitution, transition metal ions doping, and coupling with a narrow band gap semiconductor, etc. This review encompasses several advancements made in these aspects, and also the influence factors such as physical morphologies changing, humidity, as well as the presence of O2 etc, are involved. To be practically considering, TiO2 photocatalysts require being fixed on the bulky supports like silica, alumina, clays and activated carbons. Moreover, photocatalytic coatings deposited on external building materials, like roofing tiles and corrugated sheets, is becoming the attractive application potentials to remove toluene from air.
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Más fuentes

Tesis sobre el tema "Toluene|sub"

1

Pellegrini-Bonneau, Laurence. "Vaporeformage d'hydrocarbures lourds en présence de composés soufres". Poitiers, 1988. http://www.theses.fr/1988POIT2318.

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Reformage vapeur selectif du methyl-1-naphtalene en vue d'obtenir le "btx" (benzene-toluene-xylene). Utilisation d'un catalyseur mixte supporte niw/al::(2)o::(3) ou zro::(2). Etude de l'influence de promotteurs alcalins
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2

Roche, Agnès. "Mise au point et étude d'échantillonneurs diffusifs pour le suivi de l'exposition personnelle aux concentrations atmosphériques de benzène, toluène, éthylbenzène et xylènes BTEX et d'aldéhydes". Université Joseph Fourier (Grenoble), 1999. http://www.theses.fr/1999GRE10018.

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Le principe des echantillonneurs diffusifs repose sur la diffusion des composes organiques volatils, regie par la premiere loi de fick, jusqu'a un adsorbant sur lequel ils sont pieges. Ces appareils sont de plus en plus utilises pour controler les atmospheres de travail, mais on connait tres peu leurs capacites en milieu peu pollue. Il s'agit donc d'une etude menee sur des echantillonneurs de type tube pour les btex en les testant et en les etalonnant a tres basses concentrations (ppbv) dans des chambres de simulation, dans differentes conditions (humidite, agitation atmospherique), et si besoin en les modifiant (changement de la phase d'adsorption). Les durees d'exposition ont varie de une heure a cinq jours. Les etalonnages ont ete effectues a partir de la determination des concentrations par un echantillonnage dynamique des atmospheres. Nous avons d'abord tester le tenax ta comme adsorbant, et avons montre que les vitesses d'enrichissement des composes les plus volatils tels que l'hexane et le benzene n'etaient pas lineaires. Nous avons pu expliquer ces phenomenes par la difference de volatilite et par l'equilibre entre les composes et l'adsorbant. Pour etudier ces phenomenes, nous avons teste un deuxieme adsorbant, le carbopack b. Celui ci possede une plus grande affinite pour les composes etudies. En effet, nous obtenons a doses d'exposition egales un enrichissement legerement plus important sur le carbopack b, mais nous avons conserve cette non-linearite. Cette derniere n'empeche pas l'utilisation de ces echantillonneurs : on peut tracer une courbe de tendance d'enrichissement, et s'y referer pour calculer la concentration moyenne a laquelle l'echantillonneur a ete expose. L'utilisation de ces echantillonneurs a ete validee par des campagnes de prelevements en milieu urbain avec des comparaisons entre prelevements dynamiques et diffusifs. Pour les composes aldehydiques un echantillonneur de type badge a ete cree. Dans ce dernier cas, le milieu adsorbant est un filtre impregne de 2,4 dinitrophenylhydrazine. Cet echantillonneur a ete calibre en suivant le meme protocole que celui etabli auparavant. Afin d'etudier les parametres qui influent sur ces prelevements diffusifs, nous avons fait varier le nombre de filtres dans un echantillonneur, ainsi que la porosite des filtres. Nous avons ainsi pu ameliorer la limite de detection et la quantitativite par rapport aux echantillonneurs commercialises. L'utilisation de ces echantillonneurs a ete validee par des mesures en atmosphere faiblement concentree.
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3

Bahri, Hamed. "Thermodynamique dans les milieux diphasés dispersés : cas des solutions micellaires et des microémulsions". Paris 6, 1986. http://www.theses.fr/1986PA066280.

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Déduction de relations théoriques générales liant dans les systèmes liquides diphasés, les grandeurs observables "globales" aux grandeurs "locales" dans les différentes phases. Exposé de définitions et de notions thermodynamiques. Etablissement de relations générales pour les grandeurs molaires partielles. Etudes du cas d'un système réel : bromures d'alkyltrimethylammonium en milieu eau-kcl, qui montre que les solutions micellaires en milieu salin concentré peuvent être considérées comme un système diphasé. Données sur le partage d'un soluté moléculaire aniline en milieu micellaire. Etudes des volumes molaires partiels des constituants d'une microémulsion, etc. . .
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4

Liu, Huaqin. "Etude de l'oligomérisation des alpha-oléfines amorcées par des systèmes bimétalliques à base de dérivés d'un métal de transition (groupe IV B) et de composés organoaluminiques". Paris 6, 1986. http://www.theses.fr/1986PA066087.

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5

Kigabo, Faustin. "Synthese de composes aromatiques par piegeage d'ions carbonium en milieu acide ou superacide". Poitiers, 1987. http://www.theses.fr/1987POIT2261.

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6

Hickel, Probst Sonia Maria. "Propriétés catalytiques et caractérisation de catalyseurs au nickel déposé sur oxydes de terre rare : influence de l'intéraction métal-support". Poitiers, 1989. http://www.theses.fr/1989POIT2296.

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Etude des modifications des proprietes du nickel sur support d'oxydes de terres rares (lanthane et cerium) en comparant avec d'autres supports. Les caracterisations physicochimiques (reduction chimique, adsorption-desorption a temperature programmee) montrent que les oxydes de terres rares sont des supports facilement reductibles. Toutefois les mesures de chimisorption ne permettent pas de determiner la taille des particules en raison d'interactions electroniques entre le metal et le support. C'est pourquoi, les catalyseurs sont caracterises par des reactions d'hydrogenation. Mise en evidence de centres reactionnels d'adsorption du monoxyde de carbone par spectrometrie infra rouge
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Actas de conferencias sobre el tema "Toluene|sub"

1

Kord, Shahin, Hossein Dashti, Peyman Zanganeh y Shahab Ayatollahi. "Evaluation of the Kinetics of Asphaltene Flocculation during Natural Depletion and CO2 Injection in Heptane-Toluene Mixtures". En SPE/IATMI Asia Pacific Oil & Gas Conference and Exhibition. Society of Petroleum Engineers, 2017. http://dx.doi.org/10.2118/186956-ms.

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Akih-Kumgeh, Ben y Jeffrey M. Bergthorson. "A Four Component Skeletal Model for the Analysis of Jet Fuel Surrogate Combustion". En ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-94813.

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A skeletal chemical kinetic model for jet fuel combustion, comprising four representative fuel components, is presented. The sub model for the three components, toluene, methyl cyclohexane (MCH) and n-dodecane, is deduced from a detailed model for jet fuel surrogate proposed by Wang et al. [Wang et al., 2010]. The reduction is based on a species sensitivity approach, herein referred to as Alternate Species Elimination (ASE). The sub model for the fourth component, iso-octane, is established through semi-detailed kinetic modeling, considering existing reactions and species of the smaller hydrocarbon systems as well as species and reactions pertinent to the n-dodecane system. The performance of the resulting model is assessed by comparing predictions of ignition delay times and laminar burning velocities with those of the detailed model. It is shown that the skeletal model retains the predictive ability of the detailed model with respect to the three components, n-dodecane, MCH and toluene. The complementary iso-octane sub model is also found to reasonably predict high-temperature ignition delay times and laminar burning velocities. The four component skeletal model is tested against shock tube ignition data and laminar burning velocities of jet fuel surrogates. It is observed that high-temperature ignition is fairly well predicted while low-temperature ignition delay times are longer than experimentally observed. While the predictions of laminar burning velocities of atmospheric flames of jet fuels at 400 K are reasonable, slower flames are predicted at higher temperatures. The proposed skeletal model has 192 species and 1291 reactions, compared to the detailed multi-component model, with 348 species and 2163 elementary reactions, albeit without iso-octane. This results in improvement in the associated computational costs for combustion analysis. Further development of the skeletal model is needed to improve its prediction ability over a wider range of combustion properties and thermodynamic conditions.
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3

Pierleoni, Davide, Giuseppe Scherillo, Matteo Minelli, Giuseppe Mensitieri y Ferruccio Doghieri. "Probing effect of solvent concentration on glass transition and sub-Tg structural relaxation in polymer solvent mixtures: The case of polystyrene-toluene system". En VIII INTERNATIONAL CONFERENCE ON “TIMES OF POLYMERS AND COMPOSITES”: From Aerospace to Nanotechnology. Author(s), 2016. http://dx.doi.org/10.1063/1.4949616.

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4

Ramirez Hernandez, Astrid, Trupti Kathrotia, Torsten Methling, Marina Braun-Unkhoff y Uwe Riedel. "Reaction Model Development of Selected Aromatics as Relevant Molecules of a Kerosene Surrogate – The Importance of M-Xylene Within the Combustion of 1,3,5-Trimethylbenzene". En ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/gt2021-60093.

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Abstract The development of advanced reaction models to predict pollutant emissions in aero-engine combustors usually relies on surrogate formulations of a specific jet fuel for mimicking its chemical composition. 1,3,5-trimethylbenzene is one of the suitable components to represent aromatics species in those surrogates. However, a comprehensive reaction model for 1,3,5-trimethylbenzene combustion requires a mechanism to describe the m-xylene oxidation. In this work, the development of a chemical kinetic mechanism for describing the m-xylene combustion in a wide parameter range (i.e. temperature, pressure, and fuel equivalence ratios) is presented. The m-xylene reaction submodel was developed based on existing reaction mechanisms of similar species such as toluene and reaction pathways adapted from literature. The sub-model was integrated into an existing detailed mechanism that contains the kinetics of a wide range of n-paraffins, iso-paraffins, cyclo-paraffins, and aromatics. Simulation results for m-xylene were validated against experimental data available in literature. Results show that the presented m-xylene mechanism correctly predicts ignition delay times at different pressures and temperatures as well as laminar burning velocities at atmospheric pressure and various fuel equivalence ratios. At high pressure, some deviations of the calculated laminar burning velocity and the measured values are obtained at stoichiometric to rich equivalence ratios. Additionally, the model predicts reasonably well concentration profiles of major and intermediate species at different temperatures and atmospheric pressure.
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