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Showing 1 to 20 of 26 for “"n-pentane"”.
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Magnetic quenching of positronium in n-pentane
Submitted by William Weathers (weathrs2@illinois.edu) on 2012-03-21T17:01:25Z No. of bitstreams: 1 1971_henkin.pdf: 944651 bytes, checksum: 1bd22d9c5a5158c1b37c728fc95b998f (MD5)
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Positron Annihilation in N-Pentane Solutions of Galvinoxyl Free Radical
Made available in DSpace on 2014-12-10T23:01:12Z (GMT). No. of bitstreams: 1 7121246.pdf: 4404790 bytes, checksum: 87abbc4da4937206c2cc9ecad94eab19 (MD5) Previous issue date: 1971
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Adsorption and reaction kinetics of thiophene in n-pentane in a batch recirculated catalytic reactor
Includes bibliographical references (pages 129-141).
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High-pressure viscosity and density of polymer solutions at the critical polymer concentration in near-critical and supercritical fluids
… a recent investigation of PDMS + CO₂ and PE + n-pentane where molecular weights of the polymers and the critical polymer concentrations were comparable, significant differences were observed in the time evolution of new phase growth. Among the reasons that contribute to the difference in phase …
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Organic fluid mixtures as working fluids for the trilateral flash cycle system
… equation of state. By this means a mixture of n-pentane and 2,2-dimethylpropane (neopentane) was found to be the most suitable for the TFC system for expander inlet temperatures between 150-180'C. Temperature-entropy (T-S) diagrams of this organic binary mixture were obtained for several …
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Phase Behavior and Phase Separation Kinetics in Polymer Solutions under High Pressure
… Solutions of polyethylene (PE) in CO2 + n-pentane were selected as one model system to study both the solid-fluid (S-F) and liquid-liquid (L-L) phase transitions as well as the interplay of these two types of phase separations on the final morphological and thermal properties of PE …
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Density and Viscosity of Light and Heavy Phases from Mixtures of Bitumen and Solvent
… formed in binary mixtures of bitumen with n-pentane and n-butane at conditions relevant to SA-SAGD. Experimental procedures were developed to reproducibly generate and isolate the light and heavy phases. Density measurements were performed with an Anton Paar DMA HPM vibrating U-tube density …
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Applications of High Pressure Dynamic NMR
… of 1,1-difluorcyclohexane in acetone-d$\sb6$, n-pentane and methylcyclohexane compared to the pressure dependence of the isomerization of cyclohexane in the same solvents indicates that intramolecular effects cause 1,1-difluorocyclohexane to isomerize as if it is in the diffusive limit region. …
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An investigation of the motion of liquid short chain molecules using Rayleigh-Brillouin spectroscopy
… the isomers of the homologous alkane series n-pentane to n-octane. In addition to the low frequency Lorentzian component, associated with molecular reorientation, a second Lorentzian component is found in the spectra from the liquids 2,2,4-trimethylpentane, 2-methylhexane, 3-methylhexane, …
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Measurement and Modeling of Pentane-Diluted Bitumen Phase Behaviour
… mixing rules for mixtures of bitumen and n-pentane. Phase behavior data were collected for n-pentane diluted bitumen up to 14 MPa and 280°C. Saturation pressures were measured using both a PVT cell and a blind cell apparatus. The composition at which asphaltenes precipitate was measured …
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Flüchtige organische Verbindungen in der Ausatemluft von Kindern und Jugendlichen mit Asthma bronchiale
… methanol, ethanol, acetone, 2-propanol, n-pentane, isoprene, dimethylesulfide, benzende, toluene, a-pinene, limonene and eucalytole in breath samples from 20 asthmatic patients and 20 healthy controls (age 9-23 years). Three end-exhaled and one ambient air sample were collected per person …
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Thermoreversible Gelation, Crystallization and Phase Separation Kinetics in Polymer Solutions under High Pressure
… of poly(4-methyl-1-pentene) [P4MP1] in n-pentane + CO₂ and in solutions of syndiotactic polystyrene [sPS] in toluene + CO₂, and also in acetophenone + CO₂ fluid mixtures over a pressure range up to 55 MPa and carbon dioxide levels up to 50 wt %. In pure pentane, P4MP1 undergoes …
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Feasibility Analysis of Estrification Systems with Entrainers
… mentioned above. In this paper, n-hexane and n-pentane are introduced as alternative entrainers because these are more environmentally benign chemicals and less toxic compared to dichloromethane and trichloromethane (chloroform).</p>
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The reconstruction of fires involving highly flammable hydrocarbon liquids
… from surfaces such as carpet saturated with pentane were 1.5 times the rate for a free-liquid pool at the same temperature. A granular substrate such as sand produced a pentane evaporation rate twice that of a pentane liquid pool. This effect is not related to the roughness of the surface …
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Detailed Kinetic Modelling of the Oxidation and Combustion of Large Hydrocarbons Using an Automatic Generation of Mechanisms
… out. The simulation of auto-ignition of n-pentane in a rapid-compression machine shows good agreement with experimental results. Experimentally derived and numerically predicted ignition delays of n-heptane/air and n-decane/air mixtures in high-pressure shock tubes in a wide range of …
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Metal phosphates: From syntheses and structures to applications in sorption, catalysis and teeth erosion protection
… properties in the regioselective oxidation of n-pentane to 3-pentanol.
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Precipitation, Aggregation, and Settling of Asphaltenes from n-Alkane Diluted Bitumens
… settling were investigated for n-heptane and n-pentane diluted bitumens at ambient conditions. The onset and amount of precipitation were measured in air and nitrogen. The size distribution, fractal dimension, and settling rates of the aggregates were also measured. Asphaltene aggregates were …
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CONVERSION OF METHANOL AND LIGHT OLEFINS TO GASOLINE OVER A SHAPE SELECTIVE CATALYST ZSM-5
… kcal/mole for n-butane and 13.6 kcal/mole for n-pentane. The activation energy for diffusion of benzene in the Ni-ZSM-5 catalyst is 7 kcal/mole. All isotherms investigated can be represented by the Langmuir equation. ('14)C-labeled tracer studies confirm the important role that ethylene, …
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Atmospheric Mercury and Methane in the South-Central U.S.
… substantial in this area, as inferred from the i-pentane/n-pentane ratio (= 1.17). However, few THg plumes were captured in our extensive mobile laboratory surveys. Only one compressor station and one natural gas condensate processing facility were found to have significant THg emissions. Our …
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Slab-Geometry Molecular Dynamics Simulations: Development and Application to Calculation of Activity Coefficients, Interfacial Electrochemistry, and Ion Channel Transport
… binary systems: methanol/n-hexane, n-hexane/n-pentane, methanol/water, chloroform/acetone, n-hexane/chloroform, methanol/ chloroform. OMD requires the establishment of chemical potential equilibrium across a semi-permeable membrane that divides the simulation cell between a pure solvent chamber …
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