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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 160 for “"Syngas"”.
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Syngas production using a catalytic engine
… as a chemical reformer to convert natural gas to syngas by means of fuel-rich, incomplete combustion. This thesis project parallels a project that uses homogeneous reforming in-cylinder without a catalyst, with air or oxygen-enriched air (partial oxidation). This experiment explores the use and …
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Catalytic Reforming of Biogas for Syngas Production
… convert both the CH₄ and CO₂ into H₂ and CO, or syngas, a valuable product that can be used to produce liquid fuels, provide H₂ for fuel cells, or improve the combustion of biogas. A Rh/Al₂O₃ catalyst is successful in dry reforming biogas to syngas without deactivation from carbon formation at …
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Hydrogen-Rich Syngas Derived from Smouldering Biomass and Hydrocarbon Wastes
… was 33.7% resulting in a net energy positive syngas. Evidence suggests that both heterogenous gasification and the water gas shift are the mechanisms of hydrogen formation. Results indicate that a smouldering reaction can be used simultaneously as both a waste management technology and a new …
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New catalysts for syngas production from carbon dioxide and methane
The performance of cobalt tungsten carbide material was investigated for CH4/CO2 reforming. The catalyst was found to convert to a very stable, very active, form when heated in CH4/CO 2 at 850°C and 5 atm. Even after 90 hours on stream, CH4 and CO2 rates of 1.3 and 1.25 mmol/min/g respectively …
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High temperature ceramic membrane for CO₂ reuse and syngas production
… conducting membrane (MIEC) in CO2 reuse and syngas production by taking the advantage of low quality energy resource. The membrane under investigation is a La0,9Cao01FeO3 -6 (LCF) perovskite membrane. Membranes with perovskite structure have shown high oxygen permeability and 100% oxygen …
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Syngas production from heavy liquid fuel reforming in inert porous media
… power generators, a hydrocarbon reformer to syngas seems to be the way for the market uptake. In this thesis, a potential technology is developed and investigated, in order to convert commercial liquid fuel (diesel, kerosene and biodiesel) to syngas. The fundamental concept is to oxidise the …
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Kinetic and mechanistic studies for the direct conversion of syngas to ethanol
The direct conversion of syngas to ethanol (STE) is a promising route to ethanol from fossil and non-fossil carbon resources. Rh-based catalysts offer the most promising results so far. However, the accomplished yields and rates still must be improved before industrial applications become viable. …
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Design, implementation and control of microwave plasma gasification system for syngas production
This thesis provides a solution for sustainable energy production. It applies the newest technologies of microwave plasma on a traditional method known as gasification. The simulation of this system has been achieved through a high frequency structure simulator to decide the best design of the …
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Modelling and simulation of combustion of dilute syngas fuels in a CFR engine
… modified to operate on alternative fuels such as syngas and producer gas. However, the inability to predict the combustion characteristics of the alternative fuel, such as burn rates and auto-ignition conditions, is a significant challenge when simulation-based design of an engine is intended. The …
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Electrospun nanofibrous metal oxides as regenerable adsorbents for desulfurization of biomass-derived syngas
… is fast becoming an attractive method of syngas production by extracting energy from the non-food based biomass feedstocks. Unlike the more popular biochemical processes, like fermentation of cellulosic biomass, it can operate with a wide range of biomass-feedstock in terms of feed’s …
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Simulation and optimization of hot syngas separation processes in integrated gasification combined cycle
… The present state-of-the-art synthesis gas (syngas) cleanup technologies in IGCC involve cooling the syngas from gasifier to room temperature or lower for removing Sulfur, Carbon dioxide and Mercury, leading to a large efficiency loss. It is therefore important to develop processes that …
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Syngas ash deposition for a three row film cooled leading edge turbine vane
… jet-mainstream interaction and the deposition of syngas ash in the leading edge region of a turbine vane is modeled using a Lagrangian framework. The three row leading edge vane geometry is modeled as a symmetric semi-cylinder with a flat afterbody. One row of coolant holes is located along the …
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Mesostructured metal oxide-based nanocomposites as sorbents for H2S removal from syngas coal gasification
… which gasifies coal to generate the fuel (syngas) for a high efficiency gas turbine. A key challenge for producing clean power or hydrogen via gasification is cost effective purification of the sour syngas. There are many commercial treatment techniques that are used to remove H2S, but …
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The engine reformer : syngas production in engines using spark-ignition and metallic foam catalysts
… (CO), and could be used as synthesis gas ("syngas") for the synthesis of liquid fuels such as methanol. Conventional syngas production techniques are only economical on a large scale and cannot be transported to hard-to-reach gas sources, where gas-to-liquids (GTL) would have the biggest …
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Membrane-supported hydrogen/syngas production using reactive H₂O/CO₂ splitting for energy storage
… carbon deposition and achieves optimum syngas composition for gas-to-liquid. CO₂ splitting was also demonstrated on the same membrane material, with similar enhancement as fuel is introduced and porous layers are added on both sides, but at measurably lower rates than water splitting. …
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Water splitting for hydrogen and syngas production over a novel bi-layer perovskite membrane
… respectively. Co-production of hydrogen and syngas from water splitting is investigated using the single layer LSCC membrane and bi-layer membrane. The analysis shows that the bi-layer membrane has 0.149 [mu]mol/cm2-s oxygen fluxes in water splitting environment. The bi-layer configuration …
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Simulated Syngas Ash Deposition on the Leading Edge of a Turbine Vane with Film Cooling
In using coal derived syngas in a gas turbine, solid particulates coming out of the gasifier can prove to be detrimental to the engine hardware. Not much is known about particle deposition, erosion, and corrosion on turbine blades as a result of these contaminants. Performing deposition studies at …
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Developing and evaluating a partition-cavity solar thermochemical reactor for syngas production via computational fluid dynamics
<p>"Solar thermochemical processes are attractive since they have the advantages of storing solar energy as chemical fuels. In this dissertation, a partition-cavity solar thermochemical reactor was developed, and the heat and mass transfer of the solar thermochemical processes were numerically …
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Large Eddy Simulation of Leading Edge Film Cooling: Flow Physics, Heat Transfer, and Syngas Ash Deposition
… also investigates the deposition and erosion of Syngas ash particles in the film cooled leading edge region. Three ash particle sizes of 1, 5, and 10 microns are investigated at all blowing ratios using Lagrangian dynamics. The 1 micron particles with momentum Stokes number St = 0.03 (based on …
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