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 18 of 18 for “"oxy-combustion"”.
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Studies in Advanced Oxy-combustion Technologies
… 87 percent of the total world energy came from combustion sources. While combustion is of critical significance, it poses serious issues. The rapid increase in energy consumption, primarily from increased fossil fuel use, has raised strong concerns over the current energy infrastructure, the …
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Oxy-combustion of High Water Content Fuels
… we propose an unconventional concept of combustion - direct combustion of high water content fuels. Due to the high water content in the fuels, they may not burn under air-fired conditions. Therefore, oxy-combustion is applied. Three applications of this concept in power generation are …
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Dynamics, stability and scaling of turbulent methane oxy-combustion
… strategy for reducing CO₂ emissions, with oxy-fuel combustion being one of the most promising technologies because of it is high efficiency and low cost. In oxy-combustion, CH₄/O₂/CO₂ mixtures burn at low temperatures (~~1700 K), high pressures (~~40 bar), where laminar burning velocities …
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High Fidelity Chemistry And Radiation Modeling For Oxy-Combustion Scenarios
… the high CO<sub>2</sub> concentrations in an oxy-combustion atmosphere, several refined gas-phase chemistry and radiative property models have been formulated for laminar to highly turbulent systems. This thesis examines the accuracies of several chemistry and radiative property models …
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Optimization and hybridization of membrane-based oxy-combustion power plants
This thesis considers the optimization and hybridization of advanced zero emissions power (AZEP) cycles. More specifically, existing flowsheets for zero and partial emissions are optimized, and new integration schemes with solar energy are proposed and analyzed. First, optimal design and operation …
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Systems-level design of ion transport membrane oxy-combustion power plants
Oxy-fuel combustion, particularly using an integrated oxygen ion transport membrane (ITM), is a thermodynamically attractive concept that seeks to mitigate the penalties associated with CO 2 capture from power plants. Oxygen separation in an ITM system consists of many distinct physical processes, …
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Studies in Pressurized Oxy-Combustion: Process Development and Control of Radiative Heat Transfer
… of capturing the carbon dioxide emitted from the combustion sources is considered as one of the viable alternatives. This would allow the utilization of vast and widespread fuel resources (coal, oil, gas and biomass) that are capable of delivering power on demand, while mitigating the potentially …
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Rotary (redox) reactor-based oxy combustion chemical looping power cycles for CO₂ capture : analysis and optimization
… economic penalties. Chemical-looping (CLC) is an oxycombustion technology that can significantly lower such penalties, utilizing a redox process to eliminate the need for an air separation unit and enable better energy integration. Conventional CLC employs two separate reactors, with metal oxide …
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Dynamic stability, blowoff, and flame characteristics of oxy-fuel combustion
Oxy-fuel combustion is a promising technology to implement carbon capture and sequestration for energy conversion to electricity in power plants that burn fossil fuels. In oxy-fuel combustion, air separation is used to burn fuel in oxygen to easily obtain a pure stream of carbon dioxide from the …
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Process modeling and analysis of CO₂ purification for oxy-coal combustion
Oxy-coal combustion technology has great potential as one of the major CO2 capture technologies for power generation from coal. The distinguishing feature of oxy-coal combustion is that the oxygen source is a high concentration oxygen stream and the product flue gas consists primarily of CO₂ and …
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Redox kinetics study for chemical-looping combustion, water and CO₂ splitting using nickel and cerium-based oxygen carrier
… technology for several applications including oxy-combustion for carbon capture, hydrogen production and CO2 reuse. In this process, oxygen carriers are utilized to cyclically adsorb and release oxygen producing two separated exhaust streams with desirable products. A rotary reactor design with …
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Solar-thermal hybridization of Advanced Zero Emissions Power Plants
… making use of Ion Transport Membrane (ITM)-based oxy-combustion to reduce the cost of carbon dioxide separation. This work seeks to assess if there are any thermodynamic gains from hybridizing solar-thermal energy with AZEP. The particular focus is hybridizing of the bottoming cycle with …
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Gasification and combustion modeling for porous char particles
Gasification and combustion of porous char particles occurs in many industrial applications. Reactor-scale outputs of importance depend critically on processes that occur at the particle-scale. Because char particles often possess a wide range of pore sizes and react under varying operating …
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Development of macroscopic nanoporous graphene membranes for gas separation
… production, carbon dioxide sequestration, and oxy-combustion. For such applications, gas separation membranes are attractive because they offer relatively low energy costs but can be limited by low flow rates and low selectivities. Nanoporous graphene membranes have the potential to exceed the …
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Experimental study and modeling analysis of ion transport membranes for methane partial oxidation and oxyfuel combustion
… purpose, some of the leading technologies are oxy-combustion for power generation and partial oxidation for syngas production. Both require significant quantities of oxygen, whose production can impose considerable energy and economic penalties. Alternative technologies, such as …
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Thermal desalination : structural optimization and integration in clean power and water
… the Advanced Zero Emissions Plant (AZEP) oxy-combustion concept is utilized for integration in this study. The performance of several bottoming cycle integrations coupled to multi-effect distillation (MED) with and without thermal vapor compression (TVC) is estimated in order to evaluate …
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Impact of fuel and oxidizer composition on premixed flame stabilization in turbulent swirling flows : dynamics and scaling
… Among the most promising approaches are pre-combustion capture technologies, e.g., coal gasification and natural gas reforming that produce hydrogen-rich fuels. Another approach is oxy-combustion in which air is replaced by a mixture of O2/CO2/H2O as the oxidizer stream. However, modern gas …