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 44 for “"renewable fuels"”.
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Directly enhancing the photocatalytic transformation of CO2 and water to renewable fuels.
… and depletion of hydrocarbon based fuels have become global concerns. As a result, a number of methods are being developed which aim to restrict GHG and to develop alternative fuels from sustainable sources. Photocatalysis has shown potential to restrict GHG through CO2 recycling and …
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Integrated catalysis for upgrading microbial derived carboxylic acids to renewable fuels and value-added chemicals
Made available in DSpace on 2016-03-02T20:57:09Z (GMT). No. of bitstreams: 2 VARDON-DISSERTATION-2015.pdf: 52345307 bytes, checksum: 5dfd45d0fc96ab45c2d89ef1e4892e6b (MD5) LICENSE.txt: 4209 bytes, checksum: e37e56b79895fa2e14c646b004b32262 (MD5) Previous issue date: 2015-09-09
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Evaluation of anaerobic membrane bioreactors and hydrothermal catalytic gasification for enhanced conversion of organic wastes to renewable fuels
Anaerobic membrane bioreactor (AnMBR) systems, merging anaerobic digestion with membrane filtration technology, have been studied as an alternative wastewater treatment process that can effectively generate energy while removing particulates and organics in a single process. AnMBR studies with …
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Conversion of waste organic carbon and nutrient streams to renewable fuels through integrated biological funneling and catalytic hydrothermal upgrading
… wastewater treatment plants to transition into renewable resource production facilities or biorefineries, which aim to valorize the organic carbon and nutrients found in wastewater streams into valuable renewable products such as transportation-ready fuels or platform chemicals. Towards this …
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Design and implementation of a 6 kW wind powered water heater controller with PI control
In our quest to use more renewable energy to reduce our dependence on non-renewable fuels man has been harnessing wind, solar and hydro energy for many years. While hydo and solar energy are well established, it is only during the last decade that serious progress in wind energy has been made. …
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Water consumption footprint and land requirements of alternative diesel and jet fuel
The Renewable Fuels Standard 2 (RFS2) is an important component of alternative transportation fuels policy in the United States (US). By mandating the production of alternative fuels, RFS2 attempts to address a number of imperfections in the transportation fuels market: US economic vulnerability to …
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Ni and Au Transition Metal Complexes in the Photocatalytic Co2 Reduction Reaction
The production of renewable fuels by the conversion of solar energy into chemical energy is a challenge. Photocatalytic and electrocatalytic conversion of CO2 to usable fuel precursors are approaches to overcoming this challenge. The two-electron reduction of carbon dioxide to carbon monoxide is an …
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Yield response to nitrogen fertilization and harvest timing on a mature Miscanthus x giganteus stand
The U.S. demand for renewable fuels has increased due to the concerns about the availability of nonrenewable fuels in the future and the impacts these fuels have on the environment. It is likely that Miscanthus x giganteus will be an important renewable energy crop in the U.S. due to great biomass …
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Directed Synthesis and Doping of Wide Bandgap Semiconducting Oxide Nanocrystals
… photocatalytically active for the production of renewable fuels. Ultra high vacuum studies of single crystals indicate that the surface structure and faceting of oxides dramatically influence their catalytic properties. For plasmonics applications, degenerately doped oxide nanocrystals may act as …
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Production of Renewable Diesel Fuel via Hofer-Moest Decarboxylation of Free Fatty Acids
… an escalating energy problem. Advanced biofuels, derived from biologically grown feedstocks, are renewable fuels which provide a drop-in replacement for petroleum. One potential conversion pathway to turn lipid-based biomass feedstocks into a renewable diesel fuel is through non-Kolbe …
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Assessment of wastewater algae for use in biofuel production
… the attainment of previously untapped fossil fuels these practises are unsustainable and harmful to the environment. Part of the solution to ease the fuel burden is through renewable fuels derived from microalgae as they are a carbon neutral source of fuel. The aim of this research was to …
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Low temperature electrocatalytic reduction of carbon dioxide utilizing room temperature ionic liquids
… hydrocarbon fuel could provide a viable route to renewable fuels but so far the results have been stymied because of the lack of a CO2 conversion catalyst that operates at low overpotentials. In this study we report a catalyst system that shows CO2 conversion at low overpotentials. The system uses …
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Alternative and Renewable Energy
<p>The world is going to run out of fossil fuels in the near future. An estimated one to two trillion barrels of oil is believed recoverable using today’s technologies. This amount of oil will last the world no more than 70 years, and perhaps only half that long. A system of alternative and …
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Low temperature electrocatalytic reduction of carbon dioxide utilizing room temperature ionic liquids
… hydrocarbon fuel could provide a viable route to renewable fuels but so far the results have been stymied because of the lack of a CO2 conversion catalyst that operates at low overpotentials. In this study we report a catalyst system that shows CO2 conversion at low overpotentials. The system uses …
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Room Temperature Ionic Liquid (Rtil) Membranes For Bio-Methane Dehumidification
Renewable fuels are heavily researched due to the increasing price of and resulting pollution from fossil fuels. The production of useable energy from waste—animal, sewage, discarded food, landfill matter would be a valuable renewable fuel production method. Biogas is a renewable fuel that is …
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High-performance liquid chromatographic methods for quantitative assessment of degradation products and extractives in pretreated lignocellulose.
… concerns have motivated research into renewable fuels from lignocellulosic biomass. Among energy alternatives, biomass-derived ethanol represents one of the more promising commodities for long-term sustainability of transportation fuels. Herbaceous agricultural residues, such as corn …
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Market entry and exit in the spatial ethanol industry
… the ethanol industry through the creation of the Renewable Fuels Standards put in place in 2007, however the very mandate created in part to secure the future of renewable energy in the U.S. is also a source of uncertainty. In late 2015, after speculation of a reduction in the requirement for …
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Evaluating the use of renewable fuel sources to heat flue-cured tobacco barns
… been directed to explore options for the use of renewable fuels for heating tobacco barns. A two-year study conducted at the Virginia Tech Southern Piedmont Center evaluated the effectiveness and cost of curing flue-cured tobacco with a wood pellet burner. Additionally, field studies were …
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Three essays on biofuel, weather and corn yield
… dissertation is to study the competition of biofuels to meet the U.S. renewable fuels standards (RFS) and its impact on biofuel and corn prices, and the impacts of weather and soil moisture on corn yield in the Midwest. Chapter 2 illustrates the hierarchical competition of U.S. corn ethanol, …
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