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.
Results
Showing 1 to 20 of 34 for “"CO₂ emission"”.
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Trade and the environment : the political economy of CO₂ emission leakage with analysis of the steel and oil sands industries
… practices, global GHG [greenhouse gas] emissions will continue to grow over the next few decades." (Intergovernmental Panel on Climate Change, 2007)
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The impact of volcanic halogens, climate change, and sulfate aerosol geo-engineering on the atmospheric effects of volcanic eruptions
… is well understood. However, how the co-emission of volcanic halogens, climate change, and concurrent sulfate aerosol geo-engineering would alter the atmospheric effects of sulfur-only explosive volcanic eruptions has, previously, been under-researched. In this thesis, …
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The effect of altitude on the performance of a spark ignition engine using an alcohol-blended fuel
… effects of altitude on fuel economy, exhaust CO emission and engine knock response in terms of knock-limited spark advance with- a straight gasoline and a 10% ethanol blend. It has been shown that the extent of the altitude effects on fuel economy and exhaust co emission strongly depends on the …
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Mechanistic Investigation of FCC CO/NOx Emission Control Additives
… effective for the combined reduction of CO-NOx emissions and new formulations have to be developed. Moreover, it is not clear why CO combustion promoters increase the formation of NOx under FCC regenerator conditions. As a result, developing a better understanding of the surfaces chemistry …
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Simulation of Combustion and Thermal-flow Inside a Pyroscrubber
… of unburned volatiles, solid carbon, ashes, or emissions (e.g. CO, NOx and SOx) in the flue gas finally discharged. To maximize the energy recovery and reduce pollutant emission from the pyroscrubber, 3-D computational models are developed using FLUENT to simulate the combustion and thermal-flow …
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Aircraft cruise phase altitude optimization considering contrail avoidance
… for environmental objectives such as contrails, CO₂, and NOx, alongside traditional objectives such as fuelburn and flight time. Using this system model and 11 different aircraft types on 12 weather days, a preliminary study was done to determine the price range of contrail taxation that would …
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NeuralMOVES: Extracting and Learning Surrogates for Diverse Vehicle Emission Models
… given its major contribution to greenhouse gas emissions. The industry actively explores electrification, automation, and Intelligent Infrastructure to mitigate emissions. However, the successful design and implementation of these solutions require accurate and representative emission models. …
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Nano-ChemoMechanical assessment of Rice Husk Ash cement by wavelength dispersive spectroscopy and nanoindentation
… cement industry contributing about 5% to global CO₂ emission. Rice Husk Ash (RHA) among many other silicious materials, has the potential to partially replace cement and enhance the properties of the final product. The goal of this thesis is an investigation of the fundamental properties of RHA …
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Simplified real-time PAH measurement techniques
… for polycyclic aromatic hydrocarbon (PAH) emissions from these stoves. Design of stoves that reduce PAH emissions has been hampered because existing PAH measurement techniques are slow, complex, and expensive. This study investigates two simple, inexpensive, real-time PAH measurement …
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Propagation of molecular outflows into inhomogeneous media
… such flows to appear severely truncated in CO emission maps, in comparison to their full flow extents. Using various prescriptions for inhomogeneous media to create more realistic density profiles, long duration numerical simulations are run. The simulations include the use of an improved …
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Observing Seasonal Cycles in Greenhouse Gas Fluxes with Automatic Flushing Chambers in a Low-Arctic Lake
… as both sources and sinks of carbon dioxide (CO₂) and methane (CH₄). Despite their abundance, these lakes remain understudied due to harsh environmental conditions and logistical constraints. This study explores the use of low-cost, Automatic Flushing Chambers (AFCs) equipped with CH₄ and CO₂ …
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Crushed rock thermal energy storage & nuclear technology : option space & economic impacts
… rock TES with an increasingly restrictive CO₂ emission constraint. Parametric variations were used to address uncertainty in performance estimates. Crushed rock TES was found to be beneficial under favorable conditions, reducing the average price of electricity from $81/kWh (without TES) to …
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CO₂ Capture with Lithium Oxide in Molten Salt Media : A Case Study of CO₂ Capture via Electrochemically Produced Metal Oxide
… originating from anthropogenic carbon dioxide (CO₂) emission intensifies, the development of post-combustion carbon capture technologies has been urged. Although its maturity, conventional thermal swing processes using aqueous amines, suffer from significant limitations, including high energy …
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Integrating Simulation–Optimisation for Multi-Objective Blood Supply Chain Network Design
… and environmental considerations, specifically CO₂ emissions, to determine the optimal number, location, and allocation of both permanent and mobile blood collection facilities while minimising total cost, reducing CO₂ emissions, and maximising donor coverage. Unlike traditional static …
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Forecasting CO₂ emissions and identifying key CCUS factors for achieving net-zero targets in the North American cement, iron, and steel industries
Emissions of pollutants and their consequences on the atmosphere have received special attention from international organizations in recent years due to the climate crisis previewed in the next decades. In this regard, Carbon Dioxide (CO2) emissions produced in industrial sectors is one of the most …
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The effect of operating conditions on emissions from a two-stage lump coal combustor
… NO<sub>x</sub>, SO<sub>x</sub>, and smoke. The emissions can be reduced by varying the burning conditions in the stove. This investigation studied the effect of various burning conditions on the emissions from a two-stage lump coal combustor burning Wyoming bituminous coal. The parameters that …
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Gas distribution, star formation and giant molecular cloud evolution in nearby spiral galaxies
… the rotation curve. Limited coverage of the CO emission by the telescope beam can mimic the latter effect. A physically based prescription linking the CO and HI radial profiles with the stellar disk is consistent with these findings. Then, I present an analysis performed on high spatial …
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Dynamics of implementation of mitigating measures to reduce CO₂ emissions from commercial aviation
… the need to implement measures to reduce CO₂ emissions from aviation. Case studies of historical changes in the aviation industry have shown that the implementation of changes generally followed S-curves with relatively long time-constants. This research analyzed the diffusion …
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Modeling study of the hygroscopic, optical, and cloud-activation properties of aerosols from biofuel combustion
… source of aerosols and gases in the atmosphere. Emissions from biofuel combustion can affect the climate due to the presence of warming species that absorb radiation like black carbon and greenhouse gases, or cooling due to aerosols that scatter radiation back to space and affect cloud …
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Novel nanomaterials for efficient photocatalytic ammonia synthesis
… global energy consumption and can lead to 1.6% CO₂ emission. Therefore, it is urgent to develop low-cost and environmentally friendly approaches for artificial ammonia synthesis under ambient conditions. In this thesis, we summarized the current research status. Besides, a new concept of …
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