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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"fuel additives"”.
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Adsorption of Model Fuel Additives at the Metal/Oil Interface
… deposits leads to diminished engine performance, fuel economy and emissions quality. The addition of deposit-control additives to fuels is thought to mitigate this issue through their interactions with the internal metal surfaces of engines. This thesis pursues a fundamental understanding of the …
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Development of Metallic Fuel Additives and Alloys for Sodium-cooled Fast Reactors
… major goal of the work is to develop effective additives for U-10Zr (wt.%) metallic fuel to mitigate the fuel-cladding chemical interactions (FCCIs) due to fission product lanthanides and to optimize the fuel phase mainly by lowering the gamma-onset temperature. The additives Sb, Mo, Nb, and Ti …
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The influence of surface active additives on air fuel mixture behaviour and engine exhaust pollutants level
… engine. The studies involved the behavior of air-fuel and its Its effects on the amount of pollutants emitted. The pollutants studied are hydrocarbons and carbon monoxide. The research ·is based on the basic philosophy tha.t the degree of homogeneity of air·-fuel mixture determines the extent of …
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Characterization of ETBE + Cl and Isooctane + Cl Combustion Products using Synchrotron Photoionization
… K) oxidation characterizations of a series of fuel additives (ETBE and isooctane) were studied at advanced light source in Lawrence Berkley National lab, using a multiplexed chemical kinetics photoionization mass spectrometer with tunable synchrotron radiation. Using Cl atoms as initiators in …
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ΔΙΕΡΕΥΝΗΣΗ ΤΗΣ ΔΡΑΣΗΣ ΚΑΤΑΛΥΤΩΝ ΣΤΗΝ ΑΝΑΓΕΝΝΗΣΗ ΤΗΣ ΚΕΡΑΜΙΚΗΣ ΠΑΓΙΔΑΣ ΑΙΘΑΛΗΣ
… MORE SPECIFICALLY, MIXING OF CATALYTIC FUEL ADDITIVES IN DIESEL FUEL, LEADS TO SIGNIFICANT DECREASES IN REGENERATION TEMPERATURE LEVELS. THE APPLICATION OF CATALYST IN CERAMIC TRAP SYSTEMS, PRESENT A NUMBER OF SPECIAL CHARACTERISTICS, THAT ARE EXTENSIVELY ANALYZED. THE STUDY INVESTIGATES …
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Metal based reactive nanocomposites prepared by cryomilling
Aluminum is one of the most commonly used metal fuel additives for propellants, explosives, and pyrotechnics. Recent interest has been focused on replacements for aluminum as fuel additives to achieve higher combustion temperatures and stronger pressure pulses for applications in advanced munitions …
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Ignition of metal powder by electrostatic discharge stimulation
Energetic formulations with metal fuel additives are extensively used in propellants, explosives, pyrotechnics, and incendiaries. Currently, replacement of regular metal powders with nanocomposite metal-based materials is being considered. Such nanocomposite reactive materials are capable of very …
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The Investigation and Characterization of the Reaction of 2-Methylfuran and 2-Methyl-3-Buten-2-Ol with O(3P) and the Photodissociation of Xylyl Bromide Isomers
… studied the oxidation behavior of different biofuels or additives, 2-methyl-3-buten-2-ol and 2-methylfuran, in combustion experiments at the Chemical Dynamics Beamline held at the Advanced Light Source of the Lawrence Berkley National Laboratory. The oxidation of these fuels were initiated …
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Hydrogeology and Chemical Characterization of Hydrocarbon in Domestic Water Wells, Rancho Villa Subdivision, Rogers, Arkansas
… gasoline and diesel range n-alkanes. Synthetic fuel additives also were detected in the samples. These findings suggest the contamination is from a fuel spill and is not naturally occurring. The carbonate aquifer in the study area is karstified, with anisotropic flow. The contaminant has …
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Effect of market fuel variation and cetane improvers on CAI combustion in a GDI engine
There is continued interest in improving the fuel conversion efficiency of internal combustion engines and simultaneously reducing their emissions. One promising technology is that of Controlled Auto Ignition (CAI) combustion. The lack of direct combustion control makes control of CAI combustion …
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Photoionization Mass Spectrometry and Photoelectron-Photoion Coincidence (PEPICO) Spectroscopy Studies of Select Biofuel Molecules
… and thermodynamic properties of several biofuels and fuel additives. It will start with an introduction about the motivation behind these experiments. The second chapter will outline the experimental details of the apparatus at the Advanced Light Source (ALS) in Berkeley, CA, followed by the …
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Cooperative activation of biomass-derived oxygenates with Lewis acid zeolites
… thus making it possible to generate renewable fuel additives without the use of external hydrogen sources or precious metals. Continuous flow experiments reveal nonuniform changes in the relative deactivation rates of the transfer hydrogenation and etherification reactions. "9Sn and 29Si …
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Predictive chemical kinetics for auto ignition of fuel blends
… to the prediction of auto ignition in fuel blends. At the molecular scale, quantum chemical methods can give kinetic coefficients with accuracy nearing those of experiments. Even when specific kinetic parameters are unavailable, rates can be evaluated by analogy to similar molecules. …
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Investigation of Volatile Products from Wood Pyrolysis
… including furan derivatives that are useful as fuels or fuel additives. The sulfuric acid (10%) pretreatment of wood followed by slow pyrolysis produced maximum yield of charcoal, indicated by the lowest mass % decrease of 58.234. The production of furan derivatives increased by using sulfuric …
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Catalytic upgrading of biomass through the hydrodeoxygenation (HDO) of bio-oil derived model compounds
… biomass is an attractive renewable source for fuels and chemicals. Of the many conversion alternatives, catalytic fast pyrolysis has emerged as an attractive technology to convert biomass into fuel additives and value-added chemicals. Current pyrolysis oils or bio-oils are incompatible with …
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Experiment and modeling : ignition of aluminum particles with a CO2 laser
… explosives, and pyrotechnics. Aluminum powder fuel additives enable one to achieve higher combustion enthalpies and reaction temperatures. Therefore, to develop aluminum based novel and customized high density energetic materials, understanding of ignition and combustion kinetics of aluminum …
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Investigation of combustion enhancement with biomass derived fuels blended with diesel
… and environmental viability of transportation fuels increase, various types of fuel additives are now being researched to meet these needs. Biofuels are of particular interest to the automobile industry because they have the potential to significantly reduce particulate matter (PM), hydrocarbon …
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Improving the cold temperature properties of tallow-based methyl ester mixtures using fractionation, blending, and additives
… related to the thermodynamic properties of the fuel's consituents. TME has a CP of 14.5°C compared with 2.3°C for soy methyl ester (SME) and -8.3°C for canola methyl ester (CME). In this study, three methods were evaluated to reduce the CP of TME: fractionation, blending with SME and CME, and …
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Spray and combustion characteristics of acetone-butanol-ethanol and diesel in a constant volume chamber and a diesel engine
… has properties similar to current transportation fuels in comparison to ethanol. However, the main downside is the high cost of the butanol production process. Acetone-butanol-ethanol (ABE) is an intermediate product of the fermentation process of butanol production. By eliminating the separation …
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Analysis of DNA damage and repair responses in cerium exposed cells and hepatocyte spheroids
… nanoparticles are industrially valuable diesel fuel additives. While these additives improve fuel efficiency, studies have shown that exhaust contains CeO₂ nanoparticles. Gaining a better understanding of the biological effects of these nanoparticles is necessary for making informed decisions on …
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