Global ETD Search
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 39 for “"Fuel Conversion"”.
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A Study of Fuel Conversion Chemistry
Finally, the stability of cations (C5H4XNH +) on Pt(110) at 140K was utilized to investigate the degree of proton transfer reaction on a hydrogen-precovered surface. Pyridine, 3-fluoropyridine and 2-fluoropyridine are chosen as indicators. The MSAE of Pt(110) in proton affinity scale has been …
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Dual fuel conversion of a direct-injection diesel engine
Dual fuel pilot-injected diesel natural gas engines offer significant potential to reduce oxides of nitrogen (NOx) and particulate matter (PK emissions while maintaining diesel-like efficiency. A 1994 Navistar T444E turbocharger V-8 diesel engine was converted to dual fuel diesel and compressed …
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Synthesis of perovskite-ceria composites for solar-to-fuel conversion
Finding suitable replacements for fossil fuels is key to a more sustainable energy economy. This thesis investigated the effectiveness of novel composite materials made from previously researched state-of-the-art materials as catalysts in the thermochemical solar-to-fuel conversion process. …
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A fundamental study of model fuel conversion reactions in sub and supercritical water
… direct impact on present and future hydrothermal fuel conversion research for a range of fossil-based and bio-mass based feed stocks. Methane was chosen as a model compound and two different approaches were taken to examine its conversion in supercritical water. Catalytic reformation of methane …
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Fireplace analysis for efficient fuel conversion as an auxiliary system for space heating
Existing fireplaces are extremely inefficient in fuel conversion and space heating capabilities. Simple modifications can be performed to improve the combustion efficiency of fireplaces to equal, if not exceed, those of existing fuel conversion devices. This study investigates ways in which the …
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Maximum hypothetical accident analysis for HEU to LEU fuel conversion at the University of Missouri Research Reactor
… uranium (HEU) aluminide dispersion fuel to 19.75% low-enrichment uranium (LEU) U-Mo monolithic fuel. Under chapter 13 of NUREG-1573, MURR must perform several safety analyses, one of which was the maximum hypothetical accident (MHA) analysis. For the 10-minute dose to workers in …
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Loss-of-flow analysis of an unfinned, graded fuel meat, LEU monolithic U-10Mo fuel design in support of the MITR-II fuel conversion
… 93%-enr 235U highly-enriched uranium (HEU) fuel to the low-enriched uranium (LEU, <20% 235U) fuel. This reduction in enrichment decreases the neutron flux level due to parasitic absorption by 238U. The neutron flux may be compensated for by increasing the reactor's nominal operating power …
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Experimental characterization of an Ion Transport Membrane (ITM) reactor for methane oxyfuel combustion
… experimentally for oxygen separation and fuel (mostly methane) conversion purposes over the last three decades. The fuel conversion investigations typically involve converting methane to syngas or higher hydrocarbons. Over the past decade, ITMs have received considerable interest in the …
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Sustainable photocatalysis using carbon-based materials through interfacial and solvent engineering
… and scalable photocatalytic systems for solar-fuel production has gained significant attention as a pathway toward a sustainable carbon economy. Among the wide range of semiconducting materials investigated, carbon-based nanomaterials have been considered as promising candidates due to their …
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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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Numerical simulations of ion transport membrane oxy-fuel reactors for CO₂ capture applications
… features of oxygen permeation and hydrocarbon conversion in ion transport membrane (ITM) reactors. ITM reactors have been suggested as a novel technology to enable air separation and fuel conversion to take place simultaneously in a single unit. Possessing the mixed ionic and electronic …
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Engine instrumentation and data analysis for ignition system testing
The charge ignition system is used to ignite the fuel-air mixture in the combustion chamber of a spark ignited internal combustion engine and is the subject of many ongoing research projects. As a means to quantify the performance of an ignition system, a 16 horsepower Briggs and Stratton V-twin …
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A Comprehensive Study on Energy Management Strategy Design of an Extended-Range Electric Vehicle
… algorithms on the ERLV platform to achieve high fuel conversion efficiency while maintaining battery charging health. The comparative results show that the Soft Actor-Critic (SAC) had a 36% faster convergence speed than a traditional algorithm while providing a smoother and more stable action …
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Simulation of Coal Gasification Process Inside a Two-Stage Gasifier
… synthetic gas (syngas) which can be used as fuel for electric generation or chemical building block for petrochemical industries. This study performs detailed simulations of coal gasification process inside a generic two-stage entrained-flow gasifier to produce syngas carbon monoxide and …
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Investigation of the NOx and PM emissions from a diesel engine operating on nanoemulsified fuels
… compression ignition vehicles running on diesel fuel. Use of diesel fuel has a downside, namely relatively high oxides of nitrogen (NOx) and particulate matter (PM) emissions. Emulsified fuel is a mixture of water and diesel fuel. Quantum Energy Technologies Corporation (QET) have developed …
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Rotary bed reactor for chemical-looping combustion with carbon capture
… reactors. A new rotating reactor concept for gas fueled CLC is proposed. In the reactor, a solid wheel rotates between the fuel and the air streams at the reactor inlet and exit. Two purging sectors are used to avoid the mixing between the fuel stream and the air stream. The rotating wheel …
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Experimental characterization and chemical kinetics study of chemical looping combustion
… technologies to achieve carbon capture in fossil fuel power generation plants. A novel rotary-bed reactor concept was proposed by Zhao et. al. [1] in 2013. It is a compact gas fueled CLC reactor that could achieve high fuel conversion and carbon separation efficiencies. It is different from the …
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A microfabricated solid oxide fuel cell
… a significantly higher energy density, and so fuel conversion systems only need to have several percent efficiency to match and surpass the specific energy of conventional batteries. Thus, there is a strong market for successful portable fuel powered electric generators. The goal of this thesis …
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Study of lubrication oil ignition in a rapid compression machine under sporadic pre-ignition conditions
… ignition (SI) engines in an effort to increase fuel conversion efficiency. However, this has given rise to a destructive phenomenon known as sporadic pre-ignition (SPI). At low cranking speeds and high loads, engines have been observed to knock violently for brief and infrequent intervals. If …
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