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Showing 1 to 16 of 16 for “"Oxyfuel"”.
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Ion-Currents in Oxyfuel Cutting Flames Exposed to External Bias Voltages
… process of premixed methane-oxygen (CH4-O2) oxyfuel cutting flame subject to electric bias voltages. As such, the equations describing combustion, electrochemical transport for charged species, and potential are solved through a commercially available finite-volume CFD code. The reactions of …
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Simulation of Electrical Characteristics in Oxyfuel Flame Subject to An Electric Field
The oxyfuel cutting method is still widely used nowadays, even though it is not a fully autonomous process. Thisthesis presents a computational model to study ion and electron transport and current-voltage characteristics inside a methane-oxygen flame. By finding the relationship between …
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Experimental characterization of an Ion Transport Membrane (ITM) reactor for methane oxyfuel combustion
… investigation of oxygen separation and oxyfuel combustion (a relatively new ITM concept) is presented. The ITM reactor was designed with the aim of providing insight into the use of ITMs for power generation. The reactor has provisions for optical and spatial analysis. The reactor was …
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Oxygen permeation and thermo-chemical stability of oxygen separation membrane materials for the oxyfuel process
… to the global carbon mitigation effort. The oxyfuel process, which consists in the burning of coal in an oxygen-rich atmosphere to produce a flue gas highly concentrated in CO2, is a technology considered for zero CO2 emission coal-fired power plants. The production of this O2-rich combustion …
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Experimental study and modeling analysis of ion transport membranes for methane partial oxidation and oxyfuel combustion
The atmospheric concentration of CO 2 has recently exceeded 400 (ppm) (up from 285 (ppm) in 1850), largely because of the burning of fossil fuels. Despite the growth of alternatives, these fuels will continue to play a major role in the energy sector for many decades. In accordance with …
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Performance and emission characteristics of natural gas combined cycle power generation system with steam injection and oxyfuel combustion.
… steam injection in both combustion chambers. In oxyfuel combustion, higher ratio of recycle flue gas brings higher thermal efficiency and highest thermal efficiency achieved when steam is injected in main combustion chamber only. Maximum exergy destruction found in combustion chambers (57%), …
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Charakterisierung perowskitischer Hochtemperaturmembranen zur Sauerstoffbereitstellung für fossil gefeuerte Kraftwerksprozesse
… be applicable as gas separation membranes in the oxyfuel process. Here, the materials should produce the required oxygen more energy-efficient than cryogenic air separation. High-temperature materials which are applicable for this purpose are gastight and exhibit a high oxygen permeation rate and …
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Sauerstofftransport und Degradationsverhalten von Hochtemperaturmembranen für CO 2-freie Kraftwerke
… in fossil power plants within the scope of the oxyfuel-process. Different perovskite membrane materials (ABO3-d) were investigated concerning the oxygen transport and their chemical stability under operation condition. The association between oxygen transport properties and both the …
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TRANSITION METAL COATINGS FOR ENERGY CONVERSION AND STORAGE; ELECTROCHEMICAL AND HIGH TEMPERATURE APPLICATIONS
… developed to mitigate the problem, including oxyfuel coal combustion, which makes CO2 sequestration easier. One complication of oxyfuel coal combustion is that corrosion problems can be exacerbated due to flue gas recycling, which is employed to dilute the pure O2 feed and reduce the flame …
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Carbon capture from gas-fired power plant and integration with energy storage and CO2 utilisation
… and analysed in Aspen Plus® engaging air and oxyfuel combustion process. In distinction to precious studies, this model investigates and analyses three designs for the proposed scenarios. <br/><br/>The intermittent nature of solar energy makes them unsuitable for providing on-demand …
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CO2-Abtrennung aus Gasströmen durch Absorption in Poly(methyldiglykol)amin
… da er im Vergleich zum IGCC- oder dem Oxyfuel-Verfahren die geringsten Änderungen im Kraftwerksprozess selbst erfordert. Die bisher für die CO2-Abtrennung diskutierten Absorptionsmittel, wie z. B. MEA (Mono-Ethanol-Amin), haben allerdings vor allem in der Regeneration einen sehr hohen …
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Composite propellant combustion with low aluminum agglomeration
… CAP). In the 2-D laminate system the CAP/oxyfuel-matrix flame structure is seen to be similar to that previously described for non-aluminized laminates with split (diffusion) and merged (partially-premixed) flame regimes, depending on pressure and fuel-matrix thickness. Both laminate and …
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Electrical Breakdown of Thermal Spray Alumina Ceramic Applied to AlSiC Baseplates Used in Power Module Packaging
… coating process and the thermal high-velocity oxyfuel (HVOF) coating process. ASTM specifications defining appropriate testing procedures are used in testing the dielectric strength of these coupons. Issues relating to the dielectric strength and dielectric leakage current are evaluated and …
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CPFD Modeling of a Novel Internally Circulating Bubbling Fluidized Bed for Chemical Looping Combustion
… technology which operates on the fundamentals of oxyfuel combustion to concentrate carbon dioxide in the flue gas stream. Oxygen is supplied through cyclic oxidation and reduction of a solid metal oxide between an air reactor and fuel reactor to prevent the direct contact of fuel and air. …
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Untersuchungen zum Alkaliverhalten unter Oxycoal-Bedingungen
Oxycoal processes are promising power plant concepts which would allow easy CO2 removal from the exhaust products. These processes are based on the combustion of coal with recirculated flue gas that has been enriched in oxygen. To ensure the energy efficiency the oxygen may be provided by a high …