Rotary Bed Reactor for CLC with Carbon Capture PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Rotary Bed Reactor for CLC with Carbon Capture PDF full book. Access full book title Rotary Bed Reactor for CLC with Carbon Capture by Zhenlong Zhao. Download full books in PDF and EPUB format.
Author: Zhenlong Zhao
Publisher:
ISBN:
Category :
Languages : en
Pages : 140
Get Book Here
Book Description
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.
Author: Zhenlong Zhao
Publisher:
ISBN:
Category :
Languages : en
Pages : 140
Get Book Here
Book Description
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.
Author: Chukwunwike Ogbonnia Iloeje
Publisher:
ISBN:
Category :
Languages : en
Pages : 229
Get Book Here
Book Description
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.
Author: L Zheng
Publisher: Elsevier
ISBN: 0857090984
Category : Technology & Engineering
Languages : en
Pages : 397
Get Book Here
Book Description
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
Author: Mehdi Mehrpooya
Publisher: Elsevier
ISBN: 0323985742
Category : Technology & Engineering
Languages : en
Pages : 680
Get Book Here
Book Description
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
Author: Daizo Kunii
Publisher: Elsevier
ISBN: 0080553338
Category : Technology & Engineering
Languages : en
Pages : 221
Get Book Here
Book Description
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).
Author: Tianjiao Chen (S.M.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 117
Get Book Here
Book Description
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.
Author:
Publisher: Elsevier
ISBN: 0323939414
Category : Science
Languages : en
Pages : 4061
Get Book Here
Book Description
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
Author: Ramesh K. Agarwal
Publisher: Springer
ISBN: 9783031113345
Category : Technology & Engineering
Languages : en
Pages : 0
Get Book Here
Book Description
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.
Author: Paul Fennell
Publisher: Elsevier
ISBN: 0857097601
Category : Technology & Engineering
Languages : en
Pages : 467
Get Book Here
Book Description
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
Author: Fausto Gallucci
Publisher: John Wiley & Sons
ISBN: 111844938X
Category : Technology & Engineering
Languages : en
Pages : 408
Get Book Here
Book Description
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.
