Rotary Bed Reactor For Clc With Carbon Capture

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Rotary Bed Reactor for CLC with Carbon Capture

Author : Zhenlong Zhao
Publisher :
ISBN 13 :
Total Pages : 140 pages
Book Rating : 4.:/5 (816 download)

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Book Synopsis Rotary Bed Reactor for CLC with Carbon Capture by : Zhenlong Zhao

Download or read book Rotary Bed Reactor for CLC with Carbon Capture written by Zhenlong Zhao and published by . This book was released on 2012 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 the reactor, a solid wheel rotates between the fuel and the air streams at the reactor inlet and exit. Two purging sectors are used to avoid the mixing between the fuel stream and the air stream. The rotating wheel consists of a large number of channels with copper oxide coated on the inner surface of the channels. The support material is boron nitride which has high specific heat and thermal conductivity. Gas flows through the reactor at elevated pressure and it is heated from 823K to 1245K by fuel combustion. The rotary reactor design for a thermal capacity of 1MW has been performed using a simplified model that was developed to predict the performances of the reactor. Preliminary analysis shows that both the fuel conversion efficiency and the carbon separation efficiency are close to unity. The wheel temperature fluctuation is small. There is great potential for further improvement of the construction and operating conditions, which will be followed up in the future.

Rotary (redox) Reactor-based Oxy Combustion Chemical Looping Power Cycles for CO2 Capture

Author : Chukwunwike Ogbonnia Iloeje
Publisher :
ISBN 13 :
Total Pages : 229 pages
Book Rating : 4.:/5 (958 download)

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Book Synopsis Rotary (redox) Reactor-based Oxy Combustion Chemical Looping Power Cycles for CO2 Capture by : Chukwunwike Ogbonnia Iloeje

Download or read book Rotary (redox) Reactor-based Oxy Combustion Chemical Looping Power Cycles for CO2 Capture written by Chukwunwike Ogbonnia Iloeje and published by . This book was released on 2016 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 that can significantly lower such penalties, utilizing a redox process to eliminate the need for an air separation unit and enable better energy integration. Conventional CLC employs two separate reactors, with metal oxide particles circulating pneumatically in-between, leading to significant irreversibility associated with reactor temperature difference. A rotary reactor, on the other hand, maintains near-thermal equilibrium between the two stages by thermally coupling channels undergoing oxidation and reduction. In this thesis, a multiscale analysis for assessing the integration of the rotary CLC reactor technology in power generation systems is presented. This approach employs a sequence of models that successively increase the resolution of the rotary reactor representation, ranging from interacting thermal reservoirs to higher fidelity quasi-steady state models, in order to assess the efficiency potential and perform a robust optimization of the integrated system. Analytical thermodynamic availability and ideal cycles are used to demonstrate the positive impact of reactor thermal coupling on system efficiency. Next, detailed process flow-sheet models in which the rotary reactor is modeled as a set of interacting equilibrium reactors are used to validate the analytical model results, identify best cycle configurations and perform preliminary parametric analysis for between the reactor and the system while maintaining computational efficiency, an intermediate fidelity model is developed, retaining finite rate surface kinetics and internal heat transfer within the reactor. This model is integrated with a detailed system model and used for optimization, parametric analysis and characterization of the relative techno-economic performance of different oxygen carrier options for thermal plants integrated with the rotary CLC reactor. Results show that thermal coupling in the redox process increases the efficiency by up to 2% points for combined, recuperative and hybrid cycles. The studies also show that the thermal efficiency is a function of the reactor purge steam demand, which depends on the reactivity of the oxygen carrier. While purge steam constitutes a monotonic parasitic loss for the combined cycle, for recuperative and hybrid cycles, it raises the efficiency as long as the steam demand is less than a threshold value. This relationship between reactivity and system efficiency provides a useful selection criteria for the oxygen carrier material. Optimization results based on efficiency and levelized cost of electricity (LCOE) identify nickel-based oxygen carriers as the most suitable for the rotary reactor because its high reactivity ensures low steam demand and reactor cost. Compared to nickel, maximum efficiency and minimum LCOE are respectively 7% lower and 40% higher for a copper-based system; iron-based systems have 4% higher maximum efficiency and 7% higher minimum LCOE. This study also showed that optimal efficiency generally has an inverse profile to that for the optimized LCOE.

Oxy-Fuel Combustion for Power Generation and Carbon Dioxide (CO2) Capture

Author : L Zheng
Publisher : Elsevier
ISBN 13 : 0857090984
Total Pages : 397 pages
Book Rating : 4.8/5 (57 download)

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Book Synopsis Oxy-Fuel Combustion for Power Generation and Carbon Dioxide (CO2) Capture by : L Zheng

Download or read book Oxy-Fuel Combustion for Power Generation and Carbon Dioxide (CO2) Capture written by L Zheng and published by Elsevier. This book was released on 2011-02-26 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxy-fuel combustion is currently considered to be one of the major technologies for carbon dioxide (CO2) capture in power plants. The advantages of using oxygen (O2) instead of air for combustion include a CO2-enriched flue gas that is ready for sequestration following purification and low NOx emissions. This simple and elegant technology has attracted considerable attention since the late 1990s, rapidly developing from pilot-scale testing to industrial demonstration. Challenges remain, as O2 supply and CO2 capture create significant energy penalties that must be reduced through overall system optimisation and the development of new processes.Oxy-fuel combustion for power generation and carbon dioxide (CO2) capture comprehensively reviews the fundamental principles and development of oxy-fuel combustion in fossil-fuel fired utility boilers. Following a foreword by Professor János M. Beér, the book opens with an overview of oxy-fuel combustion technology and its role in a carbon-constrained environment. Part one introduces oxy-fuel combustion further, with a chapter comparing the economics of oxy-fuel vs. post-/pre-combustion CO2 capture, followed by chapters on plant operation, industrial scale demonstrations, and circulating fluidized bed combustion. Part two critically reviews oxy-fuel combustion fundamentals, such as ignition and flame stability, burner design, emissions and heat transfer characteristics, concluding with chapters on O2 production and CO2 compression and purification technologies. Finally, part three explores advanced concepts and developments, such as near-zero flue gas recycle and high-pressure systems, as well as chemical looping combustion and utilisation of gaseous fuel.With its distinguished editor and internationally renowned contributors, Oxy-fuel combustion for power generation and carbon dioxide (CO2) capture provides a rich resource for power plant designers, operators, and engineers, as well as academics and researchers in the field. Comprehensively reviews the fundamental principles and development of oxy-fuel combustion in fossil-fuel fired utility boilers Provides an overview of oxy-fuel combustion technology and its role in a carbon-constrained environment Introduces oxy-fuel combustion comparing the economics of oxy-fuel vs. post-/pre-combustion CO2 capture

Hybrid Poly-generation Energy Systems

Author : Mehdi Mehrpooya
Publisher : Elsevier
ISBN 13 : 0323985742
Total Pages : 680 pages
Book Rating : 4.3/5 (239 download)

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Book Synopsis Hybrid Poly-generation Energy Systems by : Mehdi Mehrpooya

Download or read book Hybrid Poly-generation Energy Systems written by Mehdi Mehrpooya and published by Elsevier. This book was released on 2023-09-21 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hybrid Poly-generation Energy Systems: Thermal Design and Exergy Analysis provides an analysis of the latest technologies and concepts of hybrid energy systems, focusing on thermal applications. The book guides readers through an introduction to hybrid poly-generation systems and the storage options available before working through the types of hybrid systems, including solar, fuel cells, combustion, and heating and cooling. An analysis of the economic and environmental impact of each system is included, as well as methods and approaches for exergy and energy improvement analysis. This book can be used as a tool for understanding new concepts in this emerging field and as a reference for researchers and professionals working on the integrated cogeneration of power systems. Guides the reader through hybrid processes they can apply to their own system designs Explains operational processes and includes multiple examples of optimization techniques Includes renewable energy sources, CO2 capturing processes in combined systems and advanced exergy analysis methods

Rotary Reactor Engineering

Author : Daizo Kunii
Publisher : Elsevier
ISBN 13 : 0080553338
Total Pages : 221 pages
Book Rating : 4.0/5 (85 download)

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Book Synopsis Rotary Reactor Engineering by : Daizo Kunii

Download or read book Rotary Reactor Engineering written by Daizo Kunii and published by Elsevier. This book was released on 2007-12-08 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rotary reactors or rotary kilns are the reactors facilitating the chemical reaction between the gas and solid phases usually at high temperatures.This book, which is written by an expert in the field, describes the principles of the rotary reactor and the mode of its operation. These reactors are widely used in various chemical process industries (food, pharmaceuticals) and metallurgical industries.The book defines the physiochemical aspects of the rotart reactors and provides theoretical equations of their operation.The first part of this book presents the fundamentals; solid movement, conversion of solids, and heat transfer. The middle part of the book applies these equations to a variety of processes which have been developed so far, and shows how they are used. In its last part, conceptual designs of novel rotary reactors are proposed, which performance characteristics are predicted on the basis of above equations, especially, in gasification of solid wastes. - Defines the rotary reactors and their mode of operation.- Defines all operating parameters and gives equations to predict the operation of rotary reactors under various conditions.- Includes a number of practical examples from various industrial applications (metallurgical waste treatment etc).

Experimental Characterization and Chemical Kinetics Study of Chemical Looping Combustion

Author : Tianjiao Chen (S.M.)
Publisher :
ISBN 13 :
Total Pages : 117 pages
Book Rating : 4.:/5 (88 download)

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Book Synopsis Experimental Characterization and Chemical Kinetics Study of Chemical Looping Combustion by : Tianjiao Chen (S.M.)

Download or read book Experimental Characterization and Chemical Kinetics Study of Chemical Looping Combustion written by Tianjiao Chen (S.M.) and published by . This book was released on 2014 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 and carbon separation efficiencies. It is different from the widely applied and tested fluidized-bed reactor that employs metal oxides coated on particle shaped support materials as the reaction median. In the new reactor, the active metal oxidizes are coated on the surfaces of channel shaped structural material in the new reactor. Due to the different reaction mechanism, an alternative experimental platform with the capability of performing reaction kinetic analysis for disk or channel shaped samples was required needed. The sample selection, characterization and preparation methods are discussed, followed by the introduction of the experimental system design and initial calibration and tuning results. Preliminary oxidation kinetic studies are carried out using the real-time gas analysis system to obtain the concentration contours of the effluent gas species. Commercial 13 wt% copper(II) oxide particles prepared through impregnation method are used as the reaction median. The reactant gas used in the oxidation cycles is 8%, 13% and 21% oxygen in argon, operated at 700 - 800 *C; and 10% hydrogen in argon is used for the reducing cycles.

Encyclopedia of Renewable Energy, Sustainability and the Environment

Author :
Publisher : Elsevier
ISBN 13 : 0323939414
Total Pages : 4061 pages
Book Rating : 4.3/5 (239 download)

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Book Synopsis Encyclopedia of Renewable Energy, Sustainability and the Environment by :

Download or read book Encyclopedia of Renewable Energy, Sustainability and the Environment written by and published by Elsevier. This book was released on 2024-10-01 with total page 4061 pages. Available in PDF, EPUB and Kindle. Book excerpt: Encyclopedia of Renewable Energy, Sustainability and the Environment, Four Volume Set comprehensively covers all renewable energy resources, including wind, solar, hydro, biomass, geothermal energy, and nuclear power, to name a few. In addition to covering the breadth of renewable energy resources at a fundamental level, this encyclopedia delves into the utilization and ideal applications of each resource and assesses them from environmental, economic, and policy standpoints. This book will serve as an ideal introduction to any renewable energy source for students, while also allowing them to learn about a topic in more depth and explore related topics, all in a single resource. Instructors, researchers, and industry professionals will also benefit from this comprehensive reference. Covers all renewable energy technologies in one comprehensive resource“/li> Details renewable energies’ processes, from production to utilization in a single encyclopedia Organizes topics into concise, consistently formatted chapters, perfect for readers who are new to the field Assesses economic challenges faced to implement each type of renewable energy Addresses the challenges of replacing fossil fuels with renewables and covers the environmental impacts of each renewable energy

Modeling and Simulation of Fluidized Bed Reactors for Chemical Looping Combustion

Author : Ramesh K. Agarwal
Publisher : Springer
ISBN 13 : 9783031113345
Total Pages : 0 pages
Book Rating : 4.1/5 (133 download)

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Book Synopsis Modeling and Simulation of Fluidized Bed Reactors for Chemical Looping Combustion by : Ramesh K. Agarwal

Download or read book Modeling and Simulation of Fluidized Bed Reactors for Chemical Looping Combustion written by Ramesh K. Agarwal and published by Springer. This book was released on 2023-12-17 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book describes the clean coal technology of chemical looping combustion (CLC) for power generation with pure CO2 capture. The focus of the book is on the modeling and simulation of CLC. It includes fundamental concepts behind CLC and considers all categories of fluidized beds and reactors, including a variety of oxygen carriers. The book includes process simulations with Aspen Plus® software using coal, natural gas, and biomass and computational fluid dynamics (CFD) simulations using both the Eulerian and Lagrangian methods. It describes various drag models, turbulence models, and kinetics models required for CFD simulations of CLC and covers single reactor, partial, and full-simulations, single/multi-stage as well as single-particle simulations, and CLC with reverse flow. A large number of examples for both process simulations using Aspen Plus and CFD simulations using a variety of fluidized beds/reactors employing both the two-fluid and Computational Fluid Dynamics / Discrete Element Method (CFD-DEM) model are provided. Modeling and Simulation of Fluidized Bed Reactors for Chemical Looping Combustion will be an invaluable reference for industry practitioners and researchers in academic and industrial R&D currently working on clean energy technologies and power generation with carbon capture.

Calcium and Chemical Looping Technology for Power Generation and Carbon Dioxide (CO2) Capture

Author : Paul Fennell
Publisher : Elsevier
ISBN 13 : 0857097601
Total Pages : 467 pages
Book Rating : 4.8/5 (57 download)

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Book Synopsis Calcium and Chemical Looping Technology for Power Generation and Carbon Dioxide (CO2) Capture by : Paul Fennell

Download or read book Calcium and Chemical Looping Technology for Power Generation and Carbon Dioxide (CO2) Capture written by Paul Fennell and published by Elsevier. This book was released on 2015-05-21 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calcium and Chemical Looping Technology for Power Generation and Carbon Dioxide (CO2) Capture reviews the fundamental principles, systems, oxygen carriers, and carbon dioxide carriers relevant to chemical looping and combustion. Chapters review the market development, economics, and deployment of these systems, also providing detailed information on the variety of materials and processes that will help to shape the future of CO2 capture ready power plants. Reviews the fundamental principles, systems, oxygen carriers, and carbon dioxide carriers relevant to calcium and chemical looping Provides a lucid explanation of advanced concepts and developments in calcium and chemical looping, high pressure systems, and alternative CO2 carriers Presents information on the market development, economics, and deployment of these systems

Process Intensification for Sustainable Energy Conversion

Author : Fausto Gallucci
Publisher : John Wiley & Sons
ISBN 13 : 111844938X
Total Pages : 408 pages
Book Rating : 4.1/5 (184 download)

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Book Synopsis Process Intensification for Sustainable Energy Conversion by : Fausto Gallucci

Download or read book Process Intensification for Sustainable Energy Conversion written by Fausto Gallucci and published by John Wiley & Sons. This book was released on 2015-05-12 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the application of process intensification to sustainable energy production, combining two very topical subject areas. Due to the increasing process of petroleum, sustainable energy production technologies must be developed, for example bioenergy, blue energy, chemical looping combustion, concepts for CO2 capture etc. Process intensification offers significant competitive advantages, because it provides more efficient processes, leading to outstanding cost reduction, increased productivity and more environment-friendly processes.

Advances in Theoretical and Computational Energy Optimization Processes

Author : Ferdinando Salata
Publisher : MDPI
ISBN 13 : 3039366386
Total Pages : 422 pages
Book Rating : 4.0/5 (393 download)

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Book Synopsis Advances in Theoretical and Computational Energy Optimization Processes by : Ferdinando Salata

Download or read book Advances in Theoretical and Computational Energy Optimization Processes written by Ferdinando Salata and published by MDPI. This book was released on 2020-12-29 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paradigm in the design of all human activity that requires energy for its development must change from the past. We must change the processes of product manufacturing and functional services. This is necessary in order to mitigate the ecological footprint of man on the Earth, which cannot be considered as a resource with infinite capacities. To do this, every single process must be analyzed and modified, with the aim of decarbonising each production sector. This collection of articles has been assembled to provide ideas and new broad-spectrum contributions for these purposes.

Process Intensification

Author : David Reay
Publisher : Butterworth-Heinemann
ISBN 13 : 0080983057
Total Pages : 624 pages
Book Rating : 4.0/5 (89 download)

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Book Synopsis Process Intensification by : David Reay

Download or read book Process Intensification written by David Reay and published by Butterworth-Heinemann. This book was released on 2013-06-05 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: Process Intensification: Engineering for Efficiency, Sustainability and Flexibility is the first book to provide a practical working guide to understanding process intensification (PI) and developing successful PI solutions and applications in chemical process, civil, environmental, energy, pharmaceutical, biological, and biochemical systems. Process intensification is a chemical and process design approach that leads to substantially smaller, cleaner, safer, and more energy efficient process technology. It improves process flexibility, product quality, speed to market and inherent safety, with a reduced environmental footprint. This book represents a valuable resource for engineers working with leading-edge process technologies, and those involved research and development of chemical, process, environmental, pharmaceutical, and bioscience systems. No other reference covers both the technology and application of PI, addressing fundamentals, industry applications, and including a development and implementation guide Covers hot and high growth topics, including emission prevention, sustainable design, and pinch analysis World-class authors: Colin Ramshaw pioneered PI at ICI and is widely credited as the father of the technology

Advanced Power Generation Systems

Author : Yatish T. Shah
Publisher : CRC Press
ISBN 13 : 1000798860
Total Pages : 523 pages
Book Rating : 4.0/5 (7 download)

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Book Synopsis Advanced Power Generation Systems by : Yatish T. Shah

Download or read book Advanced Power Generation Systems written by Yatish T. Shah and published by CRC Press. This book was released on 2022-12-21 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Power Generation Systems: Thermal Sources evaluates advances made in heat-to-power technologies for conventional combustion heat and nuclear heat, along with natural sources of geothermal, solar, and waste heat generated from the use of different sources. These advances will render the landscape of power generation significantly different in just a few decades. This book covers the commercial viability of advanced technologies and identifies where more work needs to be done. Since power is the future of energy, these technologies will remain sustainable over a long period of time. Key Features Covers power generation and heat engines Details photovoltaics, thermo-photovoltaics, and thermoelectricity Includes discussion of nuclear and renewable energy as well as waste heat This book will be useful for advanced students, researchers, and professionals interested in power generation and energy industries.

Carbon Capture and Storage

Author : Steve A. Rackley
Publisher : Butterworth-Heinemann
ISBN 13 : 0128120428
Total Pages : 699 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Carbon Capture and Storage by : Steve A. Rackley

Download or read book Carbon Capture and Storage written by Steve A. Rackley and published by Butterworth-Heinemann. This book was released on 2017-09-05 with total page 699 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon Capture and Storage, Second Edition, provides a thorough, non-specialist introduction to technologies aimed at reducing greenhouse gas emissions from burning fossil fuels during power generation and other energy-intensive industrial processes, such as steelmaking. Extensively revised and updated, this second edition provides detailed coverage of key carbon dioxide capture methods along with an examination of the most promising techniques for carbon storage. The book opens with an introductory section that provides background regarding the need to reduce greenhouse gas emissions, an overview of carbon capture and storage (CCS) technologies, and a primer in the fundamentals of power generation. The next chapters focus on key carbon capture technologies, including absorption, adsorption, and membrane-based systems, addressing their applications in both the power and non-power sectors. New for the second edition, a dedicated section on geological storage of carbon dioxide follows, with chapters addressing the relevant features, events, and processes (FEP) associated with this scenario. Non-geological storage methods such as ocean storage and storage in terrestrial ecosystems are the subject of the final group of chapters. A chapter on carbon dioxide transportation is also included. This extensively revised and expanded second edition will be a valuable resource for power plant engineers, chemical engineers, geological engineers, environmental engineers, and industrial engineers seeking a concise, yet authoritative one-volume overview of this field. Researchers, consultants, and policy makers entering this discipline also will benefit from this reference. Provides all-inclusive and authoritative coverage of the major technologies under consideration for carbon capture and storage Presents information in an approachable format, for those with a scientific or engineering background, as well as non-specialists Includes a new Part III dedicated to geological storage of carbon dioxide, covering this topic in much more depth (9 chapters compared to 1 in the first edition) Features revisions and updates to all chapters Includes new sections or expanded content on: chemical looping/calcium looping; life-cycle GHG assessment of CCS technologies; non-power industries (e.g. including pulp/paper alongside ones already covered); carbon negative technologies (e.g. BECCS); gas-fired power plants; biomass and waste co-firing; and hydrate-based capture

New Trends in Coal Conversion

Author : Isabel Suarez-Ruiz
Publisher : Woodhead Publishing
ISBN 13 : 0081022026
Total Pages : 542 pages
Book Rating : 4.0/5 (81 download)

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Book Synopsis New Trends in Coal Conversion by : Isabel Suarez-Ruiz

Download or read book New Trends in Coal Conversion written by Isabel Suarez-Ruiz and published by Woodhead Publishing. This book was released on 2018-08-30 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: New Trends in Coal Conversion: Combustion, Gasification, Emissions, and Coking covers the latest advancements in coal utilization, including coal conversion processes and mitigation of environmental impacts, providing an up-to-date source of information for a cleaner and more environmentally friendly use of coal, with a particular emphasis on the two biggest users of coal—utilities and the steel industry. Coverage includes recent advances in combustion co-firing, gasification, and on the minimization of trace element and CO2 emissions that is ideal for plant engineers, researchers, and quality control engineers in electric utilities and steelmaking. Other sections cover new advances in clean coal technologies for the steel industry, technological advances in conventional by-products, the heat-recovery/non-recovering cokemaking process, and the increasing use of low-quality coals in coking blends. Readers will learn how to make more effective use of coal resources, deliver higher productivity, save energy and reduce the environmental impact of their coal utilization. Provides the current state-of-the-art and ongoing activities within coal conversion processes, with an emphasis on emerging technologies for the reduction of CO2 and trace elements Discusses innovations in cokemaking for improved efficiency, energy savings and reduced environmental impact Include case studies and examples throughout the book

Dynamic Optimization Applied for Modelling and Optimal Control of a Packed Bed Reactor for Chemical-looping Combustion

Author : Marco Antonio Lucio Hernandez
Publisher :
ISBN 13 :
Total Pages : 112 pages
Book Rating : 4.:/5 (112 download)

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Book Synopsis Dynamic Optimization Applied for Modelling and Optimal Control of a Packed Bed Reactor for Chemical-looping Combustion by : Marco Antonio Lucio Hernandez

Download or read book Dynamic Optimization Applied for Modelling and Optimal Control of a Packed Bed Reactor for Chemical-looping Combustion written by Marco Antonio Lucio Hernandez and published by . This book was released on 2019 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical-looping combustion (CLC) has recently emerged as a promising technology capable of curbing CO2 emissions while also reducing the energy penalty entailed in carbon capture and sequestration (CCS). The novelty of CLC resides in its use of a metal oxide as an intermediate that serves the purpose of avoiding direct contact between fuel and air. The CLC process can be carried out in a packed bed reactor, in which the metal oxide supported in an inert material is intermittently exposed to both air and fuel streams. The oxidation stage produces a high temperature air stream that is used to feed a gas turbine and the reduction stage produces a highly concentrated CO2 stream suitable for sequestration. The transient operation of the system is complex and temperature fluctuations and unconverted fuel at the reactor's exit is expected during the oxidation and reduction stages. To the author's knowledge, a study that specifies optimal control strategies focused on increasing the efficiency of every stage in the CLC PBR cycle is in critical need to advance this emerging technology. The aim of this study is to adapt an existing 1-D mechanistic heterogeneous dynamic model, which considers mass and heat transport resistances in the particle (metal oxide and support) and the bulk fluid phases. The non-linear model is subject to validation against published data and a sensitivity analysis on key parameters during both reaction stages. Later, each reaction-stage simulation is formulated as an optimal control dynamic optimization problem that is solved using the direct transcription approach. The optimization results show improvements in the heat recovery process during the oxidation stage and a considerable reduction in fuel slip during the reduction stage, effectively producing more CO2. Moreover, based on the outcome of the sensitivity analysis, an optimistic and a worst-case scenario are considered. The dynamic optimization of the optimistic case shows even greater improvements in energy production during the oxidation stage and the results from the worst-case shows that a 97% rate of fuel conversion can be achieved within the reactor.

Advances in Low Carbon Technologies and Transition

Author : Shigemi Kagawa
Publisher : MDPI
ISBN 13 : 3039435574
Total Pages : 214 pages
Book Rating : 4.0/5 (394 download)

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Book Synopsis Advances in Low Carbon Technologies and Transition by : Shigemi Kagawa

Download or read book Advances in Low Carbon Technologies and Transition written by Shigemi Kagawa and published by MDPI. This book was released on 2021-01-06 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wide variety of technologies and products have already become widespread in our society. However, policies have not been well-implemented to effectively reduce energy consumptions and CO2 emissions by promoting low-carbon technologies and products. This Special Issue focuses on studies targeting specific products (e.g., motor vehicle, household dishwashers, etc.) and/or technologies (e.g., information and communication technology, transport technology, CO2 capture technology, etc.) and quantifying resource and energy consumptions and CO2 emissions associated with products and technology systems using the reliable inventory database. Thus, this Special Issue provides important studies on how demand- and supply-side policies can contribute to reducing energy consumptions and CO2 emissions from consumption- and production-based perspectives.