Coal Reactivity Differences And Impacts In Oxy Fuel Combustion
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Coal Reactivity Differences And Impacts In Oxy Fuel Combustion
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Author : Renu Kumar Rathnam
language : en
Publisher:
Release Date : 2008
Coal Reactivity Differences And Impacts In Oxy Fuel Combustion written by Renu Kumar Rathnam and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Coal categories.
Porosity Morphology And Structural Transformations Of Bituminous Coal Char Conversion Under A Pore Diffusion Controlled Regime
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Author : Bowarnrat Thanasattayaviboon
language : en
Publisher:
Release Date : 2016
Porosity Morphology And Structural Transformations Of Bituminous Coal Char Conversion Under A Pore Diffusion Controlled Regime written by Bowarnrat Thanasattayaviboon and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Gasification and oxy-fuel combustion technologies are a promising approach for electricity generation with improved readiness for CO2 capture and for subsequent geologic storage. Owning to limited oxy-fuel combustion knowledge, comparative evaluations on the same coal char under the pore diffusion regime studies can be useful to transfer knowledge. The comparative evaluations on reactivity, porosity transformations, morphology changes, crystallinity development, particle size distributions, and fragmentation extents of Pittsburgh no. 8 coal char during CO2 gasification conversion and char burnout in oxy-fuel combustion (21% O2/79% CO2 v/v) under the pore diffusion controlled regime were performed in a horizontal tube furnace. The initial coal char was created in an entrained-flow gasifier at 1500 C. By using the same coal char, the behavioral differences are mostly influenced by the reactant gases. The initial char was mostly thick-walled cenospheres (>80% of particles). The relative reactivities of oxy-fuel combustion/CO2 gasification were 23 times in the early conversion stage (~10% gasification-, burnout-induced conversion (daf)) and 62 times in the later stage (~60% gasification-, burnout-induced conversion (daf)). The reactivity of the char-CO2 gasification was partially impacted by annealing due to increasing degree of ordering identified by the increasing crystalline width (La) and the increasing relative amount of large aromatic rings (6 rings). The crystalline width increased from 2.56 to 2.94 nm in the CO2 gasification while it decreased from 2.56 to 2.41 nm in the oxy-fuel combustion. The relative amount of large aromatic rings increased 35% for the CO2 gasification and 14% for the oxy-fuel combustion, which influenced the reactivity particularly in the CO2 gasification-induced conversions. Pore size distributions were widely developed from microporosity to macroporosity in the CO2 gasification while the oxy-fuel combustion preferentially developed macroporosity. As expected due to the different porosity development, particle fragmentation extents also differed. These were more pronounced in the CO2 gasification 6 to 12% than in the oxy-fuel combustion 1.9 to 2.5% of particles. The char fragmentation in terms of size and shape, determined through an image processing technique on SEM micrographs. The aspect ratio can distinguish between particles (1.43) and fragments (1.43) for this coal under these conversions.
Temperature Trends In Coal Char Combustion Under Oxy Fuel Conditions For The Determination Of Kinetics
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Author :
language : en
Publisher:
Release Date : 2014
Temperature Trends In Coal Char Combustion Under Oxy Fuel Conditions For The Determination Of Kinetics written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
Thermal Power Plants
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Author : Mohammad Rasul
language : en
Publisher: BoD – Books on Demand
Release Date : 2013-04-17
Thermal Power Plants written by Mohammad Rasul and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-17 with Science categories.
Thermal power plants are one of the most important process industries for engineering professionals. Over the past decades, the power sector is facing a number of critical issues; however, the most fundamental challenge is meeting the growing power demand in sustainable and efficient ways. Practicing power plant engineers not only look after operation and maintenance of the plant, but, also look after range of activities including research and development, starting from power generation to environmental aspects of power plants. The book Thermal Power Plants - Advanced Applications introduces analysis of plant performance, energy efficiency, combustion, heat transfer, renewable power generation, catalytic reduction of dissolved oxygen and environmental aspects of combustion residues. This book addresses issues related to both coal fired and steam power plants. The book is suitable for both undergraduate and research higher degree students, and of course for practicing power plant engineers.
Oxy Fuel Combustion For Power Generation And Carbon Dioxide Co2 Capture
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Author : L Zheng
language : en
Publisher: Elsevier
Release Date : 2011-02-26
Oxy Fuel Combustion For Power Generation And Carbon Dioxide Co2 Capture written by L Zheng and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-02-26 with Technology & Engineering categories.
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
Combustion Of Pulverised Coal In A Mixture Of Oxygen And Recycled Flue Gas
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Author : Dobrin Toporov
language : en
Publisher: Elsevier
Release Date : 2014-05-30
Combustion Of Pulverised Coal In A Mixture Of Oxygen And Recycled Flue Gas written by Dobrin Toporov and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-05-30 with Technology & Engineering categories.
Combustion of Pulverised Coal in a Mixture of Oxygen and Recycled Flue Gas focuses on a niche technology, combustion of coal in an oxygen rich environment, which is one approach to obtaining ‘clean coal,’ by making it easier to capture carbon that is released in the combustion process. Toporov’s book breaks ground on covering the key fundamentals of oxycoal technologies, which have not yet been covered in this depth. Combustion of Pulverised Coal in a Mixture of Oxygen and Recycled Flue Gas summarizes the main results from a pioneering work on experimental and numerical investigations of oxyfuel technologies. It provides the theoretical background of the process, the problems to be faced, and the technical solutions that were achieved during these investigations. Summarizes results from investigations of oxyfuel technologies performed at Aachen University, Germany Provides theoretical background, as well as the primary problems of these technologies and how they can be solved
Oxy Fuel Combustion
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Author : Chuguang Zheng
language : en
Publisher: Academic Press
Release Date : 2017-09-14
Oxy Fuel Combustion written by Chuguang Zheng and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-09-14 with Science categories.
Oxy-fuel Combustion: Fundamentals, Theory and Practice provides a comprehensive review of various aspects of oxy-fuel combustion technology, including its concept, fundamental theory, pilot practice, large-scale feasibility studies and related practical issues, such as the commissioning and operation of an oxy-fuel combustion plant. Oxy-fuel combustion, as the most practical large-scale carbon capture power generation technology, has attracted significant attention in the past two decades. As significant progress has been achieved in worldwide demonstration and the oxy-combustion concept confirmed by Schwartze Pump, CUIDEN, Callide, Ponferrada and Yingcheng projects in the past five years, this book provides a timely addition for discussion and study. Covers oxy-fuel combustion technology Includes concepts, fundamentals, pilots and large-scale feasibility studies Considers related practical issues, such as the commissioning and operation of an oxy-fuel combustion plant Focuses on theories and methods closely related to engineering practice
Cleaner Combustion And Sustainable World
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Author : Haiying Qi
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-11-19
Cleaner Combustion And Sustainable World written by Haiying Qi and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-11-19 with Technology & Engineering categories.
Cleaner Combustion and Sustainable World is the proceedings of the 7th International Symposium on Coal Combustion which has a significant international influence. It concerns basic research on coal combustion and clean utilization, techniques and equipments of pulverized coal combustion, techniques and equipments of fluidized bed combustion, basic research and techniques of emission control, basic research and application techniques of carbon capture and storage (CCS), etc. Professor Haiying Qi and Bo Zhao both work at the Tsinghua University, China
Coal Combustion And Gasification
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Author : L.Douglas Smoot
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-11-11
Coal Combustion And Gasification written by L.Douglas Smoot and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-11 with Science categories.
The use of coal is required to help satisfy the world's energy needs. Yet coal is a difficult fossil fuel to consume efficiently and cleanly. We believe that its clean and efficient use can be increased through improved technology based on a thorough understanding of fundamental physical and chemical processes that occur during consumption. The principal objective of this book is to provide a current summary of this technology. The past technology for describing and analyzing coal furnaces and combus tors has relied largely on empirical inputs for the complex flow and chemical reactions that occur while more formally treating the heat-transfer effects. GrOWing concern over control of combustion-generated air pollutants revealed a lack of understanding of the relevant fundamental physical and chemical mechanisms. Recent technical advances in computer speed and storage capacity, and in numerical prediction of recirculating turbulent flows, two-phase flows, and flows with chemical reaction have opened new opportunities for describing and modeling such complex combustion systems in greater detail. We believe that most of the requisite component models to permit a more fundamental description of coal combustion processes are available. At the same time there is worldwide interest in the use of coal, and progress in modeling of coal reaction processes has been steady.
Mild Combustion Modelling Challenges Experimental Configurations And Diagnostic Tools
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Author : Alessandro Parente
language : en
Publisher: Frontiers Media SA
Release Date : 2021-11-26
Mild Combustion Modelling Challenges Experimental Configurations And Diagnostic Tools written by Alessandro Parente and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-11-26 with Technology & Engineering categories.