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Innovative Oxygen Carriers For Chemical Looping Combustion
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Book Synopsis Screening of Innovative Oxygen Carriers for Chemical-looping Combustion and Chemical-looping with Oxygen Uncoupling by :
Download or read book Screening of Innovative Oxygen Carriers for Chemical-looping Combustion and Chemical-looping with Oxygen Uncoupling written by and published by . This book was released on 2013 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Innovative Oxygen Carriers for Chemical-looping Combustion by :
Download or read book Innovative Oxygen Carriers for Chemical-looping Combustion written by and published by . This book was released on 2015 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Circulating Fluidized Beds by : J.R. Grace
Download or read book Circulating Fluidized Beds written by J.R. Grace and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 599 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the late 1970s there has been an explosion of industrial and academic interest in circulating fluidized beds. In part, the attention has arisen due to the environmental advantages associated with CFB (circulating . fluidized bed) combustion systems, the incorporation of riser reactors employing cir culating fluidized bed technology in petroleum refineries for fluid catalytic cracking and, to a lesser extent, the successes of CFB technology for calcina tion reactions and Fischer-Tropsch synthesis. In part, it was also the case that too much attention had been devoted to bubbling fluidized beds and it was time to move on to more complex and more advantageous regime,S of operation. Since 1980 a number of CFB processes have been commercialized. There have been five successful International Circulating Fluidized Bed Confer ences beginning in 1985, the most recent taking place in Beijing in May 1996. In addition, we have witnessed a host of other papers on CFB funda mentals and applications in journals and other archival publications. There have also been several review papers and books on specific CFB topics. However, there has been no comprehensive book reviewing the field and attempting to provide an overview of both fundamentals and applications. The purpose of this book is to fill this vacuum.
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
Book Synopsis Chemical Looping Systems for Fossil Energy Conversions by : Liang-Shih Fan
Download or read book Chemical Looping Systems for Fossil Energy Conversions written by Liang-Shih Fan and published by John Wiley & Sons. This book was released on 2011-02-14 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the current carbonaceous fuel conversion technologies based on chemical looping concepts in the context of traditional or conventional technologies. The key features of the chemical looping processes, their ability to generate a sequestration-ready CO2 stream, are thoroughly discussed. Chapter 2 is devoted entirely to the performance of particles in chemical looping technology and covers the subjects of solid particle design, synthesis, properties, and reactive characteristics. The looping processes can be applied for combustion and/or gasification of carbon-based material such as coal, natural gas, petroleum coke, and biomass directly or indirectly for steam, syngas, hydrogen, chemicals, electricity, and liquid fuels production. Details of the energy conversion efficiency and the economics of these looping processes for combustion and gasification applications in contrast to those of the conventional processes are given in Chapters 3, 4, and 5.Finally, Chapter 6 presents additional chemical looping applications that are potentially beneficial, including those for H2 storage and onboard H2 production, CO2 capture in combustion flue gas, power generation using fuel cell, steam-methane reforming, tar sand digestion, and chemicals and liquid fuel production. A CD is appended to this book that contains the chemical looping simulation files and the simulation results based on the ASPEN Plus software for such reactors as gasifier, reducer, oxidizer and combustor, and for such processes as conventional gasification processes, Syngas Chemical Looping Process, Calcium Looping Process, and Carbonation-Calcination Reaction (CCR) Process. Note: CD-ROM/DVD and other supplementary materials are not included as part of eBook file.
Book Synopsis Oxygen-Carrier-Aided Combustion Technology for Solid-Fuel Conversion in Fluidized Bed by : Lunbo Duan
Download or read book Oxygen-Carrier-Aided Combustion Technology for Solid-Fuel Conversion in Fluidized Bed written by Lunbo Duan and published by Springer Nature. This book was released on 2023-03-11 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book surveys the development of OCAC technology in the last decade for solid fuel conversion in fluidized beds. The scientific concerns, including combustion and emission characteristics, ash-related problems, OC aging, and so on, are summarized and analyzed. Beyond this, new concepts like OCAC with Oxy-PFBC, OCAC coupled with staged fuel conversion, OCAC in rotatory kilns and multi-functional OCAC are proposed, so as to promote the applications of OCAC to various fields in the future. Moreover, this book also outlines the perspectives for future research and development of OCAC. As an emerging technology, extensive studies and investigations are still necessary to fill in the gap from the fundamental understanding of the technology to its industrial demonstrations. Nevertheless, we believe that this book provides novel insights for the readership of energy and combustion and stimulate meaningful follow-on research on OCAC technology.
Book Synopsis A Novel Mixed Metallic Oxygen Carrier for Chemical Looping Combustion by : Mohammad Rezwanul Quddus
Download or read book A Novel Mixed Metallic Oxygen Carrier for Chemical Looping Combustion written by Mohammad Rezwanul Quddus and published by . This book was released on 2013 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: In last decades, significant concerns have been raised regarding the global warming effects. To date, about one - third of the total anthropogenic CO2 emission results from power generation using fossil based fuel and CO2 is regarded as the main contributor to global warming. Therefore, technologies for efficient capture of CO2 are becoming of great value. In this respect, Chemical-Looping Combustion (CLC) has received significant attention as a promising technology facilitating concurrent CO2 capture and power generation. This non - conventional technique employs a solid carrier, known as oxygen carrier, to supply oxygen and it facilitates the combustion process in absence of N2 diluted air. Therefore, the combustion products (CO2 and water) are easily separable without any extra downstream processing cost involved in other available alternatives. However, the non- vailability of suitable oxygen carriers still hinders the commercialization of CLC. This study, thus, deals with the development of a new mixed metallic oxygen carrier, Ni-Co/La-?-Al2O3. Several characterization techniques are used to evaluate the reactivity and stability of the prepared oxygen carriers under the industrial-scale conditions of a CLC processes. Apart from the beneficia l effects of La and Co, the reducibility and the structural properties of the prepared oxygen carriers are found to be influenced significantly by the different preparation methods used. N2 adsorption isotherms show that?-Al2O3 retains its structural int egrity under some specific preparation conditions. Reducibility as determined by consecutive temperature programmed techniques resembles the chemical properties of? - and?-Al2O3 for the other preparation techniques. However, no bulk phase change is detected for all the oxygen carriers studied using XRD. The SEM/EDX and H2 chemisorption analyses show the absence of metal agglomeration and suggest that the prepared oxygen carriers are highly stable under CLC operating conditions. The prepared oxygen carriers are also tested for reactivity, stability and fluidizability in the CREC Riser Simulator using multiple reduction/oxidation cycles with CLC fuel. Results obtained show expected reducibility, oxygen carrying capacity and stability. The solid-state kinetics of the reduction processes are developed using nucleation and nuclei growth model (NNGM) and unreacted shrinking core model (USCM). The NNGM model shows better adequacy over USCM in describing the mechanism of reduction process.
Book Synopsis Handbook of Chemical Looping Technology by : Ronald W. Breault
Download or read book Handbook of Chemical Looping Technology written by Ronald W. Breault and published by John Wiley & Sons. This book was released on 2019-01-22 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive and up-to-date handbook on this highly topical field, covering everything from new process concepts to commercial applications. Describing novel developments as well as established methods, the authors start with the evaluation of different oxygen carriers and subsequently illuminate various technological concepts for the energy conversion process. They then go on to discuss the potential for commercial applications in gaseous, coal, and fuel combustion processes in industry. The result is an invaluable source for every scientist in the field, from inorganic chemists in academia to chemical engineers in industry.
Book Synopsis Chemical-looping Combustion by : Egwono Kelvin Okpoko
Download or read book Chemical-looping Combustion written by Egwono Kelvin Okpoko and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Novel Co-precipitated Oxygen Carriers for Chemical Looping Combustion of Gaseous Fuel by : Ngozi Chinwe Ekpe
Download or read book Novel Co-precipitated Oxygen Carriers for Chemical Looping Combustion of Gaseous Fuel written by Ngozi Chinwe Ekpe and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Iron-based Oxygen Carriers in Recyclability, Physical Strength and Toxicity-tolerance for Coal-direct Chemical Looping Combustion Systems by : Cheng Lung Chung
Download or read book Development of Iron-based Oxygen Carriers in Recyclability, Physical Strength and Toxicity-tolerance for Coal-direct Chemical Looping Combustion Systems written by Cheng Lung Chung and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation presents investigations of chemical looping technology as a transformative process for combustion of fossil fuels for power generation with CO2 capture. Specifically, the dissertation seeks to synthesize and characterize a low-cost iron-based oxygen carrier that can be employed in a commercial chemical looping combustion system with realistic material lifetime and adequate resistance to toxicity from pollutants from fossil fuels such as coal. Two secondary metal oxides (Al2O3 and TiO2) as support materials for Fe2O3 and their respective reaction-induced morphological changes are presented. A novel iron-based oxygen carrier was consequently identified to be sustainable over 3000 redox cycles in high temperatures (1000 °C) at the lab scale without chemical and physical degradation. Oxygen carrier of the same design also exhibited high resistance toward attrition from circulation and fluidization in two pilot-scale demonstration units under representative conditions. Tolerance of the active ingredients of the iron-based oxygen carriers against common toxic elements in the fossil fuel feedstock, such as alkaline and sulfur compounds from conversion of coal, through multiple fixed bed experiments under conditions representative of the counter-current moving bed reducer and thermogravimetric experiments up to 9000 ppm of H2S. The likelihood of agglomeration and interaction of alkaline metals (Na, K) with the iron-based oxygen carriers were found to be extremely low under normal operating conditions. Instead, proper distribution of coal was more crucial to avoid agglomeration caused by melting of SiO2. Sulfur deposition on iron-based oxygen carriers, although observed, was reversible through regeneration with air and did not result in degradation in the recyclability of the oxygen carriers. A potential pathway for sulfur emission via the combustor spent air was also identified. The sulfur emission and distribution of the Coal-Direct Chemical Looping (CDCL) 25 kWth sub-pilot unit which utilized the iron-based oxygen carriers was determined with a custom heat-traced gas sampling system. More than 69% of the total amount of atomic sulfur from high sulfur coal was converted to SO2 and H2S in the reducer flue gas stream while less than 5% was released as SO2 in the combustor spent air. The missing atomic sulfur in the balance was attributed to sulfur retained in coal ash as inorganic sulfur compounds. A flue gas clean-up system targeting both H2S and SO2 is therefore recommended to meet the quality of CO2-rich stream for transportation and sequestration in a commercial CDCL system. The projected sulfur emission in the combustor spent air was under the US EPA sulfur emission regulation safe to be released to the atmosphere without a costly acid removal system. The findings demonstrate the robustness of the CDCL system, together with the iron-based oxygen carriers, to handle high sulfur coal without severe performance and economic penalties.
Book Synopsis Modeling Chemistry of Copper-based Oxygen Carriers in Chemical Looping Combustion Systems by : Eli A. Goldstein
Download or read book Modeling Chemistry of Copper-based Oxygen Carriers in Chemical Looping Combustion Systems written by Eli A. Goldstein and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Development of a model that can be used to predict oxidation rates of copper to cuprous and cupric oxide (Cu2O and CuO, respectively) in the air reactor of a Chemical Looping Combustion (CLC) system is the primary focus of this thesis. The proposed oxidation model, which is based in Wagner Theory and defect chemistry, describes the fundamental processes occurring during copper oxidation. Consequently, it provides better predictive capabilities over a wide range of temperatures and pressures, as well as characteristic particle geometries (spheres, cylinders and plates) than the phenomenological models that are currently being used to predict oxidation rates of copper-based oxygen carriers used in CLC systems. In addition to developing this oxidation model, cuprous and cupric oxide reduction experiments with gaseous fuels like carbon monoxide, hydrogen and methane, and solid fuels like char, wyodak coal, and corn stover, were performed to characterize reaction rates in the fuel reactor of CLC systems. Oxidation rates obtained from the oxidation model, and measured rates from the reduction experiments were used to estimate the size and oxygen carrier loading for a 10 MWth CLC system.
Book Synopsis Developments and Innovation in Carbon Dioxide (CO2) Capture and Storage Technology by : M. Mercedes Maroto-Valer
Download or read book Developments and Innovation in Carbon Dioxide (CO2) Capture and Storage Technology written by M. Mercedes Maroto-Valer and published by Elsevier. This book was released on 2010-06-21 with total page 561 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon dioxide (CO2) capture and storage (CCS) is the one advanced technology that conventional power generation cannot do without. CCS technology reduces the carbon footprint of power plants by capturing and storing the CO2 emissions from burning fossil-fuels and biomass. This volume provides a comprehensive reference on the state of the art research, development and demonstration of carbon capture technology in the power sector and in industry. It critically reviews the range of post- and pre-combustion capture and combustion-based capture processes and technology applicable to fossil-fuel power plants, as well as applications of CCS in other high carbon footprint industries. Foreword written by Lord Oxburgh, Climate Science Peer Reviews the economics, regulation and planning of carbon capture and storage for power plants and industry Explores developments in combustion processes and technologies for CO2 capture in power plants
Book Synopsis Behavior and Distribution of Sulfur Species in Coal-direct Chemical Looping with Iron-based Oxygen Carriers by : Akash G. Basu
Download or read book Behavior and Distribution of Sulfur Species in Coal-direct Chemical Looping with Iron-based Oxygen Carriers written by Akash G. Basu and published by . This book was released on 2020 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapidly rising population of the world requires us to come up with ways to meet growing energy demands efficiently while taking environmental precautions. Lately, much research has been conducted on various carbon capture utilization and storage (CCUS) methods as a way of providing energy while reducing emissions. An innovative method for carbon capture that has recently garnered attention is chemical looping combustion (CLC), due to its ability to produce a CO2 rich flue gas that can be easily sequestered and stored. The Ohio State University has developed the Coal-Direct Chemical Looping (CDCL) sub-pilot reactor system for coal combustion which uses an iron-based metal oxide as an oxygen carrier and a countercurrent moving bed for the reducer. In this study, sulfur species in the gas and solid phases in the CDCL process are studied in a bench scale moving bed reducer that is scaled down from the sub-pilot reducer to identify the distribution of sulfur species present in the solid and gaseous phases. The effects of operating parameters and the interaction between the oxygen carrier and sulfur species are also explored. It was discovered that increasing the reducer temperature produces more SO2 in the flue gas. It was also observed that the reduced oxygen carrier particles have an increased chance of reacting with H2S to form FeS. However, using CO2 as an enhancing gas can slow the rate of formation for FeS. Using CO2 provides the additional benefit of releasing more SO2 and causes less sulfur to transfer to the oxygen carrier. For the L-valve section, it was determined that using N2 as a carrier gas releases additional SO2 from the particles before transferring to the combustor, and even more SO2 can be released if the size of the L-valve section is increased. Finally, it was observed that increasing the ratio of the oxygen carrier to coal flow rate causes the conversion to increase, COS to form in zone 2 of the reducer, and less SO2 to be carried into the combustor, reducing emissions.
Book Synopsis Development and Characterisation of Oxygen-carrier Materials for Chemical-looping Combustion by : Paul Cho
Download or read book Development and Characterisation of Oxygen-carrier Materials for Chemical-looping Combustion written by Paul Cho and published by . This book was released on 2005 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Novel Oxygen Carrier Materials for Chemical Looping Combustion by : Kelly Sedor
Download or read book Novel Oxygen Carrier Materials for Chemical Looping Combustion written by Kelly Sedor and published by . This book was released on 2006 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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
