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Showing 1 to 20 of 21 for “"Ammonia synthesis"”.
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Novel nanomaterials for efficient photocatalytic ammonia synthesis
Ammonia is a key industrial raw material for fertilizers, chemicals and energy. The annual artificial ammonia synthesis via the Haber-Bosch process causes about 2% of global energy consumption and can lead to 1.6% CO₂ emission. Therefore, it is urgent to develop low-cost and environmentally …
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Development and investigation of an ammonia synthesis reactor
Ammonia production has gained increasing attention in the last decade due to its importance as a feedstock and an energy carrier. In the present thesis study, two novel ammonia production systems are presented. The first experimental system is a lab scale electromagnetic induced ammonia synthesis …
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Investigation of integrated systems for clean ammonia synthesis
… life, as it is primarily used to synthesize ammonia for fertilizer, which plays an indispensable role in feeding the world’s 7.5 billion people. Ammonia is among the most utilized chemicals all over the world owing to the numerous applications namely; fertilizer sector, cooling, fuel cells …
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The dynamic behavior of an ammonia synthesis reactor
Thesis: Sc. D., Massachusetts Institute of Technology, Department of Chemical Engineering, 1964
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Design and Analysis of Nonthermal Plasma Electrolytic Cells for Ammonia Synthesis
Haber-Bosch production of ammonia, a fertilizer and energy-dense alternative fuel, accounts for 1.8 % of global fossil fuel demand and 1-2 % of global CO2 emissions. Nonthermal plasma-assisted ammonia synthesis is one solution that is able to counter these carbon emissions. The technology has been …
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Sustainable atmospheric ammonia synthesis and nitrogen fixation using non-thermal plasma (NTP)
Ammonia has recently been intensively studied as a clean, sustainable fuel source and an efficient energy storage medium due to its effectiveness as a hydrogen carrier molecule. However, the current method of ammonia synthesis, known as the Haber-Bosch process, requires a large fossil fuel input, …
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Development and assessment of integrated energy systems with ammonia synthesis and fuel cells
Hydrogen and ammonia comprise two important clean fuels, which are expected to play a vital role in the development of clean energy production and utilization. Currently, their production relies heavily on fossil fuel-based resources that entail considerable environmental detriments. The …
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Investigation of the effects of pressure and hydrogen concentration on ammonia synthesis under neutron irradiation
… and hydrogen concentrations on the formation of ammonia by slow neutron irradiation of gaseous hydrogen-nitrogen systems. A secondary purpose of this investigation was to determine the effects of neutron irradiation on ammonia synthesis. Apparatus consisted of two parallel reaction tubes …
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Catalysis over molybdenum containing nitride materials
… targets. An example of this could be the direct synthesis of aniline from benzene, which would avoid the lengthy, uneconomic, and environmentally unfriendly process currently employed. This work explores the reactivity of bulk and supported transition metal nitride catalysts, with particular …
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A structural and reactivity study of lithium molybdenum nitride
… were observed to be catalytically active for ammonia synthesis in reaction with nitrogen containing feed gas (25% N2/H2). An impurity, which cannot be indentified through powder X-ray diffraction, was demonstrated to be the likely active phase in the sample. The role of ‘lattice’ nitrogen in …
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Investigation of novel ammonia production options using photoelectrochemical hydrogen
Hydrogen and ammonia are two of the most significant clean fuels, energy carriers and storage media in the near future. Production of these chemicals are desired to be environmentally friendly. Renewable energy, in particular solar energy-based hydrogen and ammonia production technologies bring …
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Electrochemical Pathways to Decarbonizing Urea and Ammonia Production
… focuses on decarbonizing the production of ammonia, a chemical indispensable to global food security, yet responsible for a substantial share of global CO₂ emissions due to its synthesis via the highly energy-intensive Haber-Bosch process. Ammonia is traditionally synthesized at high …
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Integrated Model of a Floating Nuclear System for Hydrogen and Ammonia Production
… carbon emissions in critical sectors. Similarly, ammonia is stepping into the spotlight as both a substitute for conventional fuels in heavy industries and as an efficient hydrogen carrier. Nuclear Power Plants (NPPs) play a critical role in this scenario, offering a steady supply of low-carbon …
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Computational heterogeneous catalysis applied to steam methane reforming over nickel and nickel/silver catalysts
… including petrochemical processing and ammonia synthesis. In addition, SMR could be an important component of future energy infrastructures as a means for producing hydrogen as an energy carrier for applications including fuel cells in automobiles and direct combustion for electricity …
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Development of a lithium-mediated nitrogen reduction process
Ammonia is an important industrial chemical that is used predominantly for producing nitrogen-containing fertilizers as well as nitric acid, polymers, and pharmaceuticals. It is also being considered as an energy-dense, carbon-free energy carrier. Today, ammonia (NH₃) is produced via the …
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Purification of Ammonia by Pressure Swing Adsorption
<p>Ammonia has long been an essential raw material for manufacture of chemical compounds of vital importance. Recent DOE-EERE-ITP Chemicals Subprogram studies have consistently ranked ethylene and ammonia as the top two most energy intensive processes. Ammonia production consumes a total energy of …
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Characterization and Quantification of Solid Electrolyte Interphases for Composition-Functionality Relationships at Lithium Metal Electrodes
… role of the SEI in Li-mediated electrochemical ammonia synthesis (LiMEAS), one of the most promising electrochemical pathways for nitrogen fixation. Here, quantification of major side products, multiscale imaging, and spectroscopic analysis were conducted methodically in four model systems, …
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Optimizing Adsorption Energies of Reaction Products and Intermediates on Metal/Metal Oxide Catalysts to Achieve High Activity and Tunable Selectivity in Solid-Gas Phase Reactions
… the Fischer-Tropsh process, CO oxidation, and ammonia synthesis are one of the heterogenous catalytic reactions which have been emerged as a critical process in chemical and energy industries for a sustainable future. It needs a catalyst to change the chemical reaction pathway and enables the …
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Toward the sustainable production of ammonia by integration of electrochemistry with light energy and nanostructured catalysts
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01
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