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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 42 for “"CO₂ capture"”.
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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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Engineering advanced adsorbent materials for CO₂ capture applications
… CO<sub>2</sub> emissions. CO<sub>2</sub> capture technologies using adsorbents have not been implemented commercially due to lack of scalable, practical and cost-effective strategies and are still under development. Moreover, the use of conventional configurations such as pellets and beads …
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Flue gas CO₂ capture using electrochemically mediated amine regeneration
… that mitigation technologies such as carbon capture are deployed to reduce carbon footprint of the continued use of fossil fuel. This thesis describes the current status of the electrochemically mediated amine regeneration (EMAR) process for the capture of CO₂ from flue gas. The absorption …
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Combined CO₂ capture and electrochemical conversion in non-aqueous environments
Carbon capture, utilization, and storage (CCUS) technologies have a central role to play in mitigating rising CO₂ emissions and enabling sustainable power generation. Most industrially mature CCS technologies based on amine chemisorption are highly energy-intensive, consuming up to 30% of the power …
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Technoeconomic Analysis and Design of CO₂ Capture and Conversion Systems
Carbon capture and conversion technologies must become economically viable and scale to the gigaton level by 2050 to avoid the most serious effects of a climate crisis. Here we present a techno-economic analysis of two promising capture and conversion technologies: CO₂ capture from ocean waters via …
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Numerical simulations of ion transport membrane oxy-fuel reactors for CO₂ capture applications
… fuel conversion processes and to capture the important features (e.g., the location, temperature, thickness and structure of a flame) of laminar oxy-fuel diffusion flames stabilized on the sweep side. The nature of oxygen permeation does not enable pre-mixing of fuel and oxidizer …
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Techno-economic analysis of pressurized oxy-fuel combustion power cycle for CO₂ capture
… generation cycles that enable carbon dioxide capture and sequestration. In this regard, oxy-fuel combustion is a promising new technology for capturing carbon dioxide in power generation systems utilizing hydrocarbon fuels. Combustion of a fuel in an environment of oxygen and recycled …
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Molten Alkali Metal Borate/Carbonate Salts for High Temperature CO₂ Capture and Electrochemical Conversion
In recent years, alkali carbonate molten salts have been developed as a medium for electrochemical conversion of CO2 into value-added carbonaceous materials, including carbon nanotubes (CNTs). While electricity requirements are significant, the high economic value of CNTs make these processes …
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Rotary (redox) reactor-based oxy combustion chemical looping power cycles for CO₂ capture : analysis and optimization
A number of CO₂ capture-enabled power generation technologies have been proposed to address the negative environmental impact of CO₂ emission. An important barrier to adopting these technologies is the associated energy and economic penalties. Chemical-looping (CLC) is an oxycombustion technology …
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Experimental Evaluation of Innovative Catalytic Heat Exchangers for Energy-efficient Amine-based Post-combustion CO₂ Capture Processes
… desorption performance in post-combustion carbon capture processes by developing and optimizing catalytic heat exchangers. The guiding principle was to address challenges, including operational complexity and high energy consumption, while minimizing costly modifications to existing piping and …
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Sorption, Transport and Gas Separation Properties of Zn-Based Metal Organic Frameworks (MOFs) and their Application in CO₂ Capture
Adsorption, separation and conversion of CO₂ from industrial processes are among the priorities of the scientific community aimed at mitigating the effects of greenhouse gases on the environment. One of the main focuses is the capture of CO₂ at stationary point sources from fossil fuel emissions …
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Investigation of adsorbent-based warm carbon dioxide capture technology for IGCC system
Integrated gasification combined cycle with CO₂ capture and sequestration (IGCC-CCS) emerges as one of the most promising technologies for reducing CO₂ emission from coal power plant without reducing thermal efficiency significantly. However the high capital cost of these plants has limited their …
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Probing the Role of Amines in Aqueous Electrochemical Reduction of Captured-state CO₂
Integrating CO₂ capture and CO₂ conversion into a single reactor presents an opportunity to power the combined process with renewable electricity. The integration of these two historically separate technologies establishes a large system parameter space, which introduces many handles for system …
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Active Interfaces: From Biointerfaces to Mineralization
… a nano-engineered surface that increases the capture rate of CO₂ bubbles with a surrounding reactive liquid by 100x compared to normal surfaces. On a system level, our surface is 1000x more volumetrically efficient (1 kgCO₂/s/m³) than conventional CO₂ capture towers currently used on power …
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Carbon dioxide capture by chemical absorption : a solvent comparison study
… importance. In the United States, energy related CO₂ emissions accounted for 98% of the total emissions in 2007 with electricity generation accounting for 40% of the total'. Carbon capture and sequestration (CCS) is one of the options that can enable the utilization of fossil fuels with lower CO₂ …
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Carbon Dioxide Capture Conversion via Calgary Framework CALF-20: Catalytic Process design and Optimization
… and support the MOF and Cu catalyst for CO? capture and electrochemical reduction reaction, respectively. One side of the GDL was coated with Zinc-based MOF. The MOF layer served as a CO? concentrator and a screening stage, where it allows a higher percentage of CO? molecules to pass through …
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Investigation and Characterization of the Optical, Thermal, and Adsorption Properties of Carbon Aerogels for CO2 Capture Applications
Climate change driven by rising atmospheric CO₂ concentrations has intensified the need for efficient, regenerable solid sorbents. Carbon aerogels are promising candidates due to their ultra-high porosity, low density, and tunable structure, yet their coupled optical, photothermal, and CO₂ …
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Modeling of carbon dioxide absorption/stripping by aqueous methyldiethanolamine/piperazine
… data for all amine, amine/water, and amine/water/CO₂ systems. The sensitivity of CO₂ absorption rate was determined in a wetted wall column simulation in Aspen Plus®, and the results were used in Microsoft Excel to determine the optimum reaction rates, activation energies, and binary …
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Analysis and design of electrochemically-mediated carbon dioxide separation
Large-scale carbon dioxide (CO₂) separation is essential in the efforts to curb climate change, with applications in power stations, natural gas purification and enhanced oil recovery. Current CO₂ capture technology is energetically intensive, and challenging to deploy in existing power stations. …
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