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 178 for “"Looping"”.
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Chemical Looping Electricity Storage
… high storage capacity by using the chemical looping concept. To do so, a simplified model of a packed bed reactor is developed enabling faster analysis of different layouts and materials. The objective is to find layouts and material properties that are optimising the performance of the …
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Chemical Looping for Selective Oxidations
… describes the development of chemical looping for selective oxidations. Chemical looping is a reactor technology that achieves simultaneous reaction and separation. For a large subset of reactions (viz. abstraction or insertion of oxygen), this technology is based upon the use of oxygen …
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CFD Simulation of Chemical Looping Combustion System
… rising to approximately 59% by 2050. Chemical looping combustion (CLC) is one of the most promising cost-effective technologies that can be retrofitted onto existing power plants for CCS. The main drawback attributed to CLC is a very low confidence level as a consequence of the lack of maturity …
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Chemical Looping Combustion: A Multi-Scale Analysis
Chemical looping combustion (CLC) is a technique for separating pure carbon dioxide from the combustion of fuels. The oxygen to burn the fuel comes from the lattice oxygen contained in solid particles of an inorganic oxide (the ‘oxygen carrier’), instead of from oxygen in the air. Thus only CO2 and …
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Selective Oxidation Reactions: A Chemical Looping Approach
… demand and greenhouse gas emissions. Chemical looping (CL) offers a novel route to improve energy efficiency and environmental performance, hence investigated in this Dissertation for two selective oxidation reactions: (i) the epoxidation of ethylene to ethylene oxide, and (ii) the oxidative …
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Process and Reactor Level Simulations of Calcium Looping Combustion
<p>Calcium looping (CaL) is a recent technology for carbon capture from coal fired power plants which consumes less energy than other approaches such as oxy-fuel. In the first part of this thesis, a system level model is developed in ASPEN PLUS to calculate the energy penalty of introducing Calcium …
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Application of Chemical Looping for Solar Thermal Energy Storage
… to address this issue is to perform a chemical looping cycle with pressure swing for thermal energy storage. This study assesses the potential of suitable metal oxides for thermochemical storage by pressure swing thermodynamically and experimentally through phase diagram and Thermogravimetric …
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Glyph : lightweight and evocative looping images in the news
… a tool for creating expressive, seamlessly-looping GIFs from video. The tool integrates opensource software for video/image manipulation and loop detection into a simple, web-based authoring interface. Glyph allows a user to automatically detect perfect loops that occur in a video, create …
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Looping at One Elementary School: How Successful Was It?
… educational practice in grouping students is looping. Looping involves teachers remaining with the same students for two or more years. This practice was implemented in the elementary school in this study. This is an evaluation of looping in the first and second grades. The study has both …
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Prevalence And Physiological Significance Of Gene Looping In Saccharomyces Cerevisiae
… initiation factors involved in gene looping. In this study we showed that the RNAP II subunit Rpb4 has a significant effect on termination of transcription. Gene looping is disrupted in the absence of Rpb4. Rpb4 shows a strong physical interaction with the Mediator subunit Srb5. …
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The effectiveness of looping in self-contained special education classrooms
The practice of looping, a single teacher remaining with a core group of students for two or more years, is one that is used in some self-contained special education settings. The purpose of this study was to show that this practice is beneficial to both teacher and students in this type of …
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Interactions between catalysts and oxygen carriers in chemical looping processes
… on a reactive metal oxide, applied for chemical looping processes, using Ag/SrFeO3−δ as a model system. In chemical looping processes, lattice oxygen is provided from a metal oxide (termed the oxygen carrier) to generate purified oxygen, or, to react with a reducing gas (e.g. a hydrocarbon) to …
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Experimental characterization and chemical kinetics study of chemical looping combustion
Chemical looping combustion (CLC) is one of the most promising technologies to achieve carbon capture in fossil fuel power generation plants. A novel rotary-bed reactor concept was proposed by Zhao et. al. [1] in 2013. It is a compact gas fueled CLC reactor that could achieve high fuel conversion …
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Rotary bed reactor for chemical-looping combustion with carbon capture
Chemical-looping combustion (CLC) is a novel and promising technology for power generation with inherent CO2 capture. Currently almost all the research has been focused on developing CLC based inter-connected fluidized bed reactors. A new rotating reactor concept for gas fueled CLC is proposed. In …
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Collaborative Simulation of Reacting Flow and Controller in Chemical Looping Systems
… to fluctuating conditions. Among these, chemical looping technologies, including chemical looping combustion (CLC) and chemical looping gasification (CLG), stand out as promising solutions for carbon capture and hydrogen (H2) production. They rely on interconnected reactors and oxygen carriers …
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Chemical Looping Applied to Synthetic Fuels Production via Solar Thermochemical Routes
L'abstract è presente nell'allegato / the abstract is in the attachment
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Looping predictive method to improve accuracy of a machine learning model
… work for humans. In this project a new “Looping Predictive Method” was developed that allows generating large training datasets from a small seed set of tweets by repeatedly adding machine-labeled tweets to the human-labeled tweets. With this method, an accuracy improvement of 15.4% was …
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The Looping Effects of Grief Classifications: Public Discourses Behind the Screen
… health. In my discussion, I frame possible looping effects that may be developing in PGD, and outline implications of this project for the broader discipline, and mental health providers.
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Wavelet adaptive and predictive control with applications to chemical looping system
Chemical looping process is a novel technology to separate oxygen from nitrogen using solid oxygen carrier to facilitate carbon dioxide capture in the design of next generation clean coal power plants. Application of the available control techniques to this process to guarantee its tight and robust …
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