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 60 for “"Synthesis gas"”.
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Synthesis gas use in internal combustion engines.
… ignition engine operating on various blends of synthesis gas. To fully investigate the three ICE operating regimes, experimental investigations were carried out to focus on: 1.) A CI engine operating on ethanol and hydrogen fuel 2.) A CI engine operating on diesel fuel with varying blends of …
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Simultaneous production of methanol and dimethylether from synthesis gas
Dimethylether is a non-toxic liquefied gas, which is projected to become one of the fundamental chemical feedstock in the future. Dimethylether can be produced from syngas via a two-step (indirect) process that involves synthesis of methanol by hydrogenation of CO/CO2 over a copper based catalyst …
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Decomposition of methanol into synthesis gas over supported palladium catalysts
Includes bibliographical references (pages 87-92).
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Catalytic membrane reactors for synthesis gas production from natural gas via partial oxidation.
Natural gas obtained during the extraction of liquid hydrocarbons is often undesired due to the lack of infrastructure to transport the natural gas to an onshore location. As a result the natural gas is often flared causing economic waste and environmental concern. It would therefore be desirable …
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Direct synthesis gas conversion to alcohols and hydrocarbons using a catalytic membrane reactor.
… mode, was used for the conversion of synthesis gas (H2 + CO) into mixed alcohols and hydrocarbons via the Fischer-Tropsch synthesis. Carbon monoxide conversions of 78% and 90% at near atmospheric pressure (300kPa) and 493K were recorded over cobalt and bimetallic Co-Mn membranes …
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The oxidative reforming of methane to synthesis gas on a commercial steam reforming catalyst
… steam reforming of methane, as well as the water-gas shift reaction, resulted in the best fit between measured- and predicted data. The predicted methane, carbon monoxide- and hydrogen partial pressures correlated well with experimental data, but that of oxygen, carbon dioxide and water were less …
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Evaluation of sorbents for the cleanup of coal-derived synthesis gas at elevated temperatures
Integrated Gasification Combined Cycle (IGCC) with carbon dioxide capture is a promising technology to produce electricity from coal at a higher efficiency than with traditional subcritical pulverized coal (PC) power plants. As with any coal-based technology, however, it is of critical importance …
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Catalytic Process for the Conversion of Synthesis gas to Ethanol for Use as an Alternative Fuel
… alcohols will likely be carried out via syngas, which can be produced from a number of feedstocks, including coal, natural gas and biomass. Rhodium-based catalysts have been found to be the most active/selective for higher alcohols. However, the literature shows that the yields of …
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Identifying Genetic Targets and Growth Conditions for Higher Ethanol Production by the Synthesis Gas Fermenting Bacterium Clostridium ljungdahlii.
North Carolina State University Theses Microbiology.
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Recycling the tail-gas during the low temperature Fischer-Tropsch process
… (i) use a diluted feed, such as nitrogenrich synthesis gas, thereby saving on synthesis gas costs [Jess et aI., 1999] or (ii) recycle of the unconverted synthesis gas that leaves the reactor, after condensation of the liquid products (or use a number of reactors in series with intermediate …
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Autoclave Studies of Lignite Liquefaction
… on the liquefaction of lignite using hydrogen or synthesis gas was studied. A slurry contain ing 200 grams of moisture-ash-free (MAF) lignite, 100 grams of water, and 400 grams of hydrogenated anthracene oil solvent was fed into the University of North Dakota Time-Sampling Hot-Charge Batch …
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The Effect of Two Catalysts (Ammonia and Quinoline) on The Liquefaction of North Dakota Lignite
… a reaction temperature of 420˚C and a reducing gas of either synthesis gas or carbon monoxide gave the maximum yield of distillate. While ammonia promotes the formation of distillate, overall conversion is not increased. Quinoline had no significant effect on the overall conversion and …
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Design, implementation and control of microwave plasma gasification system for syngas production
… 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 structure. Microwave radiation at the frequency of 2.45 GHz has been applied to ionise argon gas and convert …
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Platinum group metals catalyzed steam methane reforming via micro-channel reactor
… process used for generating hydrogen and synthesis gas. By performing this reaction in micro-channel reactors it is possible to take advantage of increased heat and mass transfer rates, allowing equipment size and residence times to be decreased by an order of magnitude which, in turn, …
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Enabling Cl-Based bioconversion with metabolic engineering
Single-carbon (C) substrates, such as synthesis gas and methanol, are attractive feedstocks for biochemical processes, as they are widely available, can be produced renewably, and do not compete with food supply. However, their use in industrial bioprocessing remains limited, primarily because …
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Transition metal oxide layered materials as catalyst and precatalyst for green energy applications: Oxygen evolution reaction and Fischer-Tropsch synthesis
… (OER) in water splitting, and Fischer-Tropsch synthesis (FTS) to generate synthetic fuels. Birnessite is a 2D layered manganese dioxide material with intercalated Lewis cations and water molecules. Birnessites have been extensively investigated for their catalytic activity towards oxygen …
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Initial steps of the Fischer-Tropsch sysnthesis on Fe(100) : the role of hydrogen
… industrially applied catalytic process in which synthesis gas (H2 and CO produced from coal or natural gas) is converted to a wide range of long chain hydrocarbons. Although various microscopic mechanisms have been proposed, the fundamental role of hydrogen in the initialisation steps of these …
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The effect of activation on the deactivation of a precipitated iron based catalyst
… process since diesel fuel derived from natural gas Fischer-Tropsch processes can meet the proposed future legislation standards for sulphur emissions without further processing. Oil refineries producing diesel fuel on the other hand would have to invest $4-13 billion to meet the proposed sulphur …
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The synthesis and reactivity of binuclear μ-hydrocarbyl complexes of some transition metals
… of some polymethylene bridged compounds with synthesis gas have also been investigated. This reaction is of importance in view of the fact that polymethylene bridged compounds have been implicated in a number of catalytic processes e.g the Fischer- Tropsch reaction. The reaction with synthesis …
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