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Showing 1 to 20 of 126 for “"Heptane"”.
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Shock Ignition of N-Heptane With Supplemental Hydrogen
… of adding molecular hydrogen to a mixture of n-heptane (surrogate for diesel fuel) and air on ignition delay time at prototypic post-compression diesel engine conditions. Ignition delay time data was measured using the reflected shock wave technique at a pressure of 20 bar (representative of …
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Adsorption from binary solutions of polar n-decyl derivatives and heptane onto alumina
… and ethyl octanoate from binary solutions with heptane onto alumina was studied. The net surface excess isotherms were measured and resolved into component isotherms. The heat of immersion of the alumina in n-decanol, ethyl octanoate, and n-decanoic acid solutions was measured. The heats of …
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Crystalline Morphologies of Poly(butadiene)-b-Poly(ethylene oxide) Block Copolymers in n-Heptane
… from selective solvent condition (70°C in n-heptane) via two thermal pathways: (A) by direct immersion into liquid nitrogen, where n-heptane becomes a poor solvent for both blocks at very low temperatures, and (B): by quenching to the crystallization temperature of the PEO, i.e., determined …
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A Study of Factors Influencing the Interfacial Tension Between Heptane and Solutions of Lipoproteins
Made available in DSpace on 2014-12-05T19:37:01Z (GMT). No. of bitstreams: 1 5900528.pdf: 3731583 bytes, checksum: 2114a990b3487433bfdf266cb01f0b0d (MD5) Previous issue date: 1958
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Optical investigation of ethanol and n-heptane dual-fuel partially premixed combution in s reciprocating engine
<p>The details of the dual-fuel combustion of n-heptane and ethanol were investigated in an optically accessible engine representative of light-duty applications. Experimental work involved the application of optical diagnostics such as high-speed imaging of combustion chemiluminescence and soot …
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An Experimental Investigation of JP-7 and n-Heptane Extinction Limits in an Opposed Jet Burner
… limits at one atmosphere for vaporized n-heptane, the Air Force-developed fuels JP-7, and JP-10, as well as methane, ethane, ethylene, propane, butane, and hydrogen. In hypersonic aircraft development it is desirable to design a Scramjet engine that is operated on hydrocarbon fuel, …
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Characterisation of the autoignition delay behaviour of n-heptane in the IQT combustion bomb using CFD modelling
When n-heptane was tested in the IQT device over a range of temperatures and pressures, the measured autoignition delay did not correlate with the chemical autoignition delay associated with a stoichiometric, homogenous mixture as predicted by detailed chemical kinetic models. ... This project …
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Investigations of Bicyclo(3.1.1)heptane Terpenes in Higher Plants: Stereochemistry of Pinene Biosynthesis and Isolation of Bergamoten-12-Oic Acids
… carbon of 2-hydroxy-2,6-dimethylbicyclo (3.1.1) heptane-6-carboxylic acid lactone, was used to determine the stereochemical fate of the distal methyl groups of GPP. Complete retention of tritium in all three pinene products established that the E methyl group of GPP became the exo methyl group at …
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An analysis of the kinetics for oil agglomeration of coal
… the nonpolar oils (tetralin and a heptane/heptanol mixture) were more stable than the polar oil (heptane) and an ultrasonic treatment produced the most turbid emulsions;In batch studies with Australian coal from the Ulan mine, emulsification decreased the time needed for …
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Separation of liquid mixtures by membranes.
… membrane has a higher permeation rate of n-heptane and a lower permeation rate of ethyl alcohol than a PES membrane in pervaporation separation of ethyl alcohol/n-heptane mixtures. The second part of this study concerns reverse osmosis of liquid mixtures. A new method to determine the …
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Studies of immobilized homogeneous metal catalysts on silica supports
… to produce predominately fluorocyclohexane in heptane and 1,2-dichloroethane (DCE) solvents. In heptane/methanol and heptane/water solvents, hydrodefluorination to benzene and subsequent hydrogenation to cyclohexane occurs exclusively. Benzene inhibits the hydrodefluorination of fluorobenzene. …
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I. Solution Photochemistry of Camphor II. Synthesis and Solution Photochemistry of 2, 2-Dimethylcyclobutanone
… of camphor in solutions of 95% ethanol or n-heptane produces mainly α-campholenic aldehyde. In ethanol a bicyclic acetal is also formed, while in n-heptane a bicyclic enol ether is formed instead of the acetal. Deuterium labelling experiments indicate that the acetal is formed by reaction of …
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Photodissociation Dynamics In Titan's Atmosphere
… atmosphere (diacetylene, cyanoacetylene and heptane isomers) are carried out under collisionless condition using the DC slice imaging technique. In diacetylene photodissociation, two-photon processes dominate at 243 nm and 212 nm whereas at 121.6 nm, a one-photon dissociation process …
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Neutron diffraction and quasielastic neutron scattering studies of films of N-alkanes and a branched alkane adsorbed on graphite
… studies of monolayer, bilayer, and trilayer nheptane (n-C[subscript 7]D[subscript 16]) above a crystalline n-dotriacontane monolayer adsorbed on graphite investigated the dynamics within these heptane layers. These studies found that the heptane layers exhibited both a slow motion dominating …
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Synthesis and Biological Evaluation of Novel Epibatidine Analogues
… of 2-(hydroxyalkylpyridyl)-7-azabicyclo[2.2.1]heptane derivatives were synthesized and evaluated as potential ligands for nicotinic acetylcholine receptors. Moreover, two rigid 2-acetoxy-7-azabicyclo[2.2.1]heptane analogues have been prepared to study the binding conformation of acetylcholine …
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The effect of applied and magnetic fields on the crystallisation of hydrocarbons
… nonadecane, static and dynamic nonadecane in heptane, static and dynamic nonadecane and heneicosane, static and dynamic nonadecane and heneicosane in heptane and static and dynamic nonadecane and crude oil. The results of these studies showed that the magnetic and applied fields can affect …
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An Infrared Analysis of 2-Substituted-7-Oxabicyclo (4.1.0) Heptanes and the Corresponding 7-Thiabicyclo System
… and episulfide ring of 7-oxabicyclo(4.1.0)heptane and the corresponding 7-thia-bicyclo system.
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The synthesis and properties of some higher membered fused alicyclic ring systems
… nitrous acid to yield derivatives of benz-cyclo-heptane. However, further attempts to apply this reaction to the synthesis of bicyclo-[0.5.5]-dodecane derivatives was abandoned because of the difficulty of preparing the required amino intermediates. The use of an intramolecular Grignard …
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Detailed Kinetic Modelling of the Oxidation and Combustion of Large Hydrocarbons Using an Automatic Generation of Mechanisms
… and numerically predicted ignition delays of n-heptane/air and n-decane/air mixtures in high-pressure shock tubes in a wide range of temperatures, pressures and equivalence ratios agree very well. Concentration profiles of the main products and intermediates of n-heptane, iso-octane and n-decane …
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Binuclear Transition Metal Derivatives of 1,2-Bis(indenyl)ethane
… 4(C9H7)Ru(CO)2]2. The corresponding reaction in heptane gave instead the tetranuclear cluster [Ru4H(CO) 9(mu3-eta2-eta2-eta 5-C9H6)](C2H4)(C 9H7). The structure of the rac form of Ru 2(CO)4(mu-(eta5-C9H6) 2C2H4 was determined by x-ray crystallography.
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