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Hybrid Sulfur Cycle Flowsheets For Hydrogen Production Using High Temperature Gas Cooled Reactors
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Book Synopsis Hybrid Sulfur Cycle Flowsheets for Hydrogen Production Using High-Temperature Gas-Cooled Reactors by :
Download or read book Hybrid Sulfur Cycle Flowsheets for Hydrogen Production Using High-Temperature Gas-Cooled Reactors written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Two hybrid sulfur (HyS) cycle process flowsheets intended for use with high-temperature gas-cooled reactors (HTGRs) are presented. The flowsheets were developed for the Next Generation Nuclear Plant (NGNP) program, and couple a proton exchange membrane (PEM) electrolyzer for the SO2-depolarized electrolysis step with a silicon carbide bayonet reactor for the high-temperature decomposition step. One presumes an HTGR reactor outlet temperature (ROT) of 950 C, the other 750 C. Performance was improved (over earlier flowsheets) by assuming that use of a more acid-tolerant PEM, like acid-doped poly[2,2'-(m-phenylene)-5,5'-bibenzimidazole] (PBI), instead of Nafion{reg_sign}, would allow higher anolyte acid concentrations. Lower ROT was accommodated by adding a direct contact exchange/quench column upstream from the bayonet reactor and dropping the decomposition pressure. Aspen Plus was used to develop material and energy balances. A net thermal efficiency of 44.0% to 47.6%, higher heating value basis is projected for the 950 C case, dropping to 39.9% for the 750 C case.
Book Synopsis Hybrid Sulfur Cycle Operation for High-temperature Gas-cooled Reactors by :
Download or read book Hybrid Sulfur Cycle Operation for High-temperature Gas-cooled Reactors written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A hybrid sulfur (HyS) cycle process for the production of hydrogen is provided. The process uses a proton exchange membrane (PEM) SO.sub. 2-depolarized electrolyzer (SDE) for the low-temperature, electrochemical reaction step and a bayonet reactor for the high-temperature decomposition step The process can be operated at lower temperature and pressure ranges while still providing an overall energy efficient cycle process.
Book Synopsis HYBRID SULFUR PROCESS REFERENCE DESIGN AND COST ANALYSIS. by :
Download or read book HYBRID SULFUR PROCESS REFERENCE DESIGN AND COST ANALYSIS. written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents a detailed study to determine the expected efficiency and product costs for producing hydrogen via water-splitting using energy from an advanced nuclear reactor. It was determined that the overall efficiency from nuclear heat to hydrogen is high, and the cost of hydrogen is competitive under a high energy cost scenario. It would require over 40% more nuclear energy to generate an equivalent amount of hydrogen using conventional water-cooled nuclear reactors combined with water electrolysis compared to the proposed plant design described herein. There is a great deal of interest worldwide in reducing dependence on fossil fuels, while also minimizing the impact of the energy sector on global climate change. One potential opportunity to contribute to this effort is to replace the use of fossil fuels for hydrogen production by the use of water-splitting powered by nuclear energy. Hydrogen production is required for fertilizer (e.g. ammonia) production, oil refining, synfuels production, and other important industrial applications. It is typically produced by reacting natural gas, naphtha or coal with steam, which consumes significant amounts of energy and produces carbon dioxide as a byproduct. In the future, hydrogen could also be used as a transportation fuel, replacing petroleum. New processes are being developed that would permit hydrogen to be produced from water using only heat or a combination of heat and electricity produced by advanced, high temperature nuclear reactors. The U.S. Department of Energy (DOE) is developing these processes under a program known as the Nuclear Hydrogen Initiative (NHI). The Republic of South Africa (RSA) also is interested in developing advanced high temperature nuclear reactors and related chemical processes that could produce hydrogen fuel via water-splitting. This report focuses on the analysis of a nuclear hydrogen production system that combines the Pebble Bed Modular Reactor (PBMR), under development by PBMR (Pty.) Ltd. in the RSA, with the Hybrid Sulfur (HyS) Process, under development by the Savannah River National Laboratory (SRNL) in the US as part of the NHI. This work was performed by SRNL, Westinghouse Electric Company, Shaw, PBMR (Pty) Ltd., and Technology Insights under a Technical Consulting Agreement (TCA). Westinghouse Electric, serving as the lead for the PBMR process heat application team, established a cost-shared TCA with SRNL to prepare an updated HyS thermochemical water-splitting process flowsheet, a nuclear hydrogen plant preconceptual design and a cost estimate, including the cost of hydrogen production. SRNL was funded by DOE under the NHI program, and the Westinghouse team was self-funded. The results of this work are presented in this Final Report. Appendices have been attached to provide a detailed source of information in order to document the work under the TCA contract.
Book Synopsis HYBRID SULFUR FLOWSHEETS USING PEM ELECTROLYSIS AND A BAYONET DECOMPOSITION REACTOR. by :
Download or read book HYBRID SULFUR FLOWSHEETS USING PEM ELECTROLYSIS AND A BAYONET DECOMPOSITION REACTOR. written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A conceptual design is presented for a Hybrid Sulfur process for the production of hydrogen using a high-temperature nuclear heat source to split water. The process combines proton exchange membrane-based SO2-depolarized electrolyzer technology being developed at Savannah River National Laboratory with silicon carbide bayonet decomposition reactor technology being developed at Sandia National Laboratories. Both are part of the US DOE Nuclear Hydrogen Initiative. The flowsheet otherwise uses only proven chemical process components. Electrolyzer product is concentrated from 50 wt% sulfuric acid to 75 wt% via recuperative vacuum distillation. Pinch analysis is used to predict the high-temperature heat requirement for sulfuric acid decomposition. An Aspen Plus{trademark} model of the flowsheet indicates 340.3 kJ high-temperature heat, 75.5 kJ low-temperature heat, 1.31 kJ low-pressure steam, and 120.9 kJ electric power are consumed per mole of H2 product, giving an LHV efficiency of 35.3% (41.7% HHV efficiency) if electric power is available at a conversion efficiency of 45%.
Book Synopsis ALTERNATIVE FLOWSHEETS FOR THE SULFUR-IODINE THERMOCHEMICAL HYDROGEN CYCLE. by : LC. BROWN
Download or read book ALTERNATIVE FLOWSHEETS FOR THE SULFUR-IODINE THERMOCHEMICAL HYDROGEN CYCLE. written by LC. BROWN and published by . This book was released on 2003 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: OAK-B135 A hydrogen economy will need significant new sources of hydrogen. Unless large-scale carbon sequestration can be economically implemented, use of hydrogen reduces greenhouse gases only if the hydrogen is produced with non-fossil energy sources. Nuclear energy is one of the limited options available. One of the promising approaches to produce large quantities of hydrogen from nuclear energy efficiently is the Sulfur-Iodine (S-I) thermochemical water-splitting cycle, driven by high temperature heat from a helium Gas-Cooled Reactor. They have completed a study of nuclear-driven thermochemical water-splitting processes. The final task of this study was the development of a flowsheet for a prototype S-I production plant. An important element of this effort was the evaluation of alternative flowsheets and selection of the reference design.
Book Synopsis Fundamentals of Hydrogen Production and Utilization in Fuel Cell Systems by : Seyed Ehsan Hosseini
Download or read book Fundamentals of Hydrogen Production and Utilization in Fuel Cell Systems written by Seyed Ehsan Hosseini and published by Elsevier. This book was released on 2023-07-26 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Hydrogen Production and Utilization in Fuel Cell Systems provides a comprehensive overview of the complex and interdisciplinary issues surrounding the use of hydrogen fuel cells in the global transportation system. With a particular emphasis on the commercialization and implementation of hydrogen fuel cells, the book deals with production, utilization, storage and safety, and addresses the application of fuel cells in the road, rail, maritime and aviation sectors. For each sector, the book discusses the fundamentals of fuel cells, the current technical, environmental, safety, and economic performance, the main barriers to implementation and how to address themThis book is an invaluable reference for researchers, graduate students and industry engineers across the fuel cells and transportation sector, but is also ideal for policymakers involved in the energy transition. Offers the first account of hydrogen fuel cell systems that considers every sector: road, rail, maritime and aviation Focuses on the practical utilization and implementation of hydrogen fuel cells in transportation systems Summarizes the latest research and developments in hydrogen fuel cell powered transportation
Book Synopsis Materials for Hydrogen Production, Conversion, and Storage by : Inamuddin
Download or read book Materials for Hydrogen Production, Conversion, and Storage written by Inamuddin and published by John Wiley & Sons. This book was released on 2023-03-21 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt: MATERIALS FOR HYDROGEN PRODUCTION, CONVERSION, AND STORAGE Edited by one of the most well-respected and prolific engineers in the world and his team, this book provides a comprehensive overview of hydrogen production, conversion, and storage, offering the scientific literature a comprehensive coverage of this important fuel. Continually growing environmental concerns are driving every, or almost every, country on the planet towards cleaner and greener energy production. This ultimately leaves no option other than using hydrogen as a fuel that has almost no adverse environmental impact. But hydrogen poses several hazards in terms of human safety as its mixture of air is prone to potential detonations and fires. In addition, the permeability of cryogenic storage can induce frostbite as it leaks through metal pipes. In short, there are many challenges at every step to strive for emission-free fuel. In addition to these challenges, there are many emerging technologies in this area. For example, as the density of hydrogen is very low, efficient methods are being developed and engineered to store it in small volumes. This groundbreaking new volume describes the production of hydrogen from various sources along with the protagonist materials involved. Further, the extensive and novel materials involved in conversion technologies are discussed. Also covered here are the details of the storage materials of hydrogen for both physical and chemical systems. Both renewal and non-renewal sources are examined as feedstocks for the production of hydrogen. The non-renewal feedstocks, mainly petroleum, are the major contributor to date but there is a future perspective in a renewal source comprising mainly of water splitting via electrolysis, radiolysis, thermolysis, photocatalytic water splitting, and biohydrogen routes. Whether for the student, veteran engineer, new hire, or other industry professionals, this is a must-have for any library.
Book Synopsis Progress in Sustainable Energy Technologies: Generating Renewable Energy by : Ibrahim Dincer
Download or read book Progress in Sustainable Energy Technologies: Generating Renewable Energy written by Ibrahim Dincer and published by Springer. This book was released on 2014-10-29 with total page 737 pages. Available in PDF, EPUB and Kindle. Book excerpt: This multi-disciplinary volume presents information on the state-of-the-art in sustainable energy technologies key to tackling the world’s energy challenges and achieving environmentally benign solutions. Its unique amalgamation of the latest technical information, research findings and examples of successfully applied new developments in the area of sustainable energy will be of keen interest to engineers, students, practitioners, scientists and researchers working with sustainable energy technologies. Problem statements, projections, new concepts, models, experiments, measurements and simulations from not only engineering and science, but disciplines as diverse as ecology, education, economics and information technology are included, in order to create a truly holistic vision of the sustainable energy field. The contributions feature coverage of topics including solar and wind energy, biomass and biofuels, waste-to-energy, renewable fuels, geothermal and hydrogen power, efficiency gains in fossil fuels and energy storage technologies including batteries and fuel cells.
Book Synopsis Solar Fuels by : Nurdan Demirci Sankir
Download or read book Solar Fuels written by Nurdan Demirci Sankir and published by John Wiley & Sons. This book was released on 2023-05-31 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most important obstacle to solar meeting all our energy needs is that solar energy is not always accessible and therefore cannot be used when needed. Therefore, the conversion of solar energy into chemical energy, which has become more and more important in recent years, is a groundbreaking topic in the field of renewable energy. This type of chemical energy is called solar fuel. Hydrogen, methanol, methane, and carbon monoxide are among the solar fuels, which can be produced via solar-thermal, artificial photosynthesis, photocatalytic or photoelectrochemical routes. The Advances in Solar Cell Materials and Storage series aims to provide information on new and cutting-edge materials, advanced solar cell designs and architecture, and new concepts in photovoltaic conversion and storage. Solar Fuels, which is the third volume of this series, compiles the objectives related to the new semiconductor materials and manufacturing techniques for solar fuel generation. Chapters are written by distinguished authors who have extensive experience in their fields. A multidisciplinary contributor profile including chemical engineering, materials science, environmental engineering, and mechanical and aerospace engineering provides a broader point of view and coverage of the topic. Therefore, readers absolutely will have a chance to learn about not only the fundamentals but also the various aspects of the materials science and manufacturing technologies for solar fuel production. Moreover, readers from diverse fields will definitely take advantage of this book to comprehend the impacts of solar energy conversion in chemical form.
Book Synopsis Hydrogen Production Using Solid-polymer-electrolyte Technology for Water Electrolysis and Hybrid Sulfur Cycle by : J. M. Sedlak
Download or read book Hydrogen Production Using Solid-polymer-electrolyte Technology for Water Electrolysis and Hybrid Sulfur Cycle written by J. M. Sedlak and published by . This book was released on 1979 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electrochemical Power Sources: Fundamentals, Systems, and Applications by : Tom Smolinka
Download or read book Electrochemical Power Sources: Fundamentals, Systems, and Applications written by Tom Smolinka and published by Elsevier. This book was released on 2021-10-25 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrochemical Power Sources: Fundamentals, Systems, and Applications: Hydrogen Production by Water Electrolysis offers a comprehensive overview about different hydrogen production technologies, including their technical features, development stage, recent advances, and technical and economic issues of system integration. Allied processes such as regenerative fuel cells and sea water electrolysis are also covered. For many years hydrogen production by water electrolysis was of minor importance, but research and development in the field has increased significantly in recent years, and a comprehensive overview is missing. This book bridges this gap and provides a general reference to the topic. Hydrogen production by water electrolysis is the main technology to integrate high shares of electricity from renewable energy sources and balance out the supply and demand match in the energy system. Different electrochemical approaches exist to produce hydrogen from RES (Renewable Energy Sources). Covers the fundamentals of hydrogen production by water electrolysis Reviews all relevant technologies comprehensively Outlines important technical and economic issues of system integration Includes commercial examples and demonstrates electrolyzer projects
Book Synopsis Electrochemical Methods for Hydrogen Production by : Keith Scott
Download or read book Electrochemical Methods for Hydrogen Production written by Keith Scott and published by Royal Society of Chemistry. This book was released on 2019-11-25 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increased hydrogen supplies using cleaner methods are seen as essential for potential hydrogen based power systems for transportation and renewable energy conversion into fuel. This book provides a comprehensive picture of the various routes to use electricity to produce hydrogen using electrochemical science and technology. Edited by an expert in the field, this title will be of interest to graduate students and researchers in academia and industry working in energy, electrochemistry, physical chemistry and chemical engineering.
Download or read book Hydrogen Technology written by Aline Léon and published by Springer Science & Business Media. This book was released on 2008-07-18 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aline Leon ́ In the last years, public attention was increasingly shifted by the media and world governmentsto the conceptsof saving energy,reducingpollution,protectingthe - vironment, and developing long-term energy supply solutions. In parallel, research funding relating to alternative fuels and energy carriers is increasing on both - tional and international levels. Why has future energy supply become such a matter of concern? The reasons are the problems created by the world’s current energy supply s- tem which is mainly based on fossil fuels. In fact, the energystored in hydrocarb- based solid, liquid, and gaseous fuels was, is, and will be widely consumed for internal combustion engine-based transportation, for electricity and heat generation in residential and industrial sectors, and for the production of fertilizers in agric- ture, as it is convenient, abundant, and cheap. However, such a widespread use of fossil fuels by a constantly growing world population (from 2. 3 billion in 1939 to 6. 5 billion in 2006) gives rise to the two problems of oil supply and environmental degradation. The problemrelated to oil supply is caused by the fact that fossil fuels are not - newable primary energy sources: This means that since the rst barrel of petroleum has been pumped out from the ground, we have been exhausting a heritage given by nature.
Book Synopsis Hydrogen Production Via a Sulfur-sulfur Thermochemical Water-splitting Cycle by : Nicholas J. AuYeung
Download or read book Hydrogen Production Via a Sulfur-sulfur Thermochemical Water-splitting Cycle written by Nicholas J. AuYeung and published by . This book was released on 2011 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermochemical water splitting cycles have been conceptualized and researched for over half a century, yet to this day none are commercially viable. The heavily studied Sulfur-Iodine cycle has been stalled in the early development stage due to a difficult HI-H2O separation step and material compatibility issues. In an effort to avoid the azeotropic HI-H2O mixture, an imidazolium-based ionic liquid was used as a reaction medium instead of water. Ionic liquids were selected based on their high solubility for SO2, I2, and tunable miscibility with water. The initial low temperature step of the Sulfur-Iodine cycle was successfully carried out in ionic liquid reaction medium. Kinetics of the reaction were investigated by I2 colorimetry. The reaction also evolved H2S gas, which led to the conceptual idea of a new Sulfur-Sulfur thermochemical cycle, shown below: [equation] The critical step in the Sulfur-Sulfur cycle is the steam reformation of H2S. This highly endothermic step is shown to successfully occur at temperatures in excess of 800°C in the presence of a molybdenum catalyst. A parametric study varying the H2O:H2S ratio, temperature, and residence time in a simple tubular quartz reactor was carried out and Arrhenius parameters were estimated. All reactive steps of the Sulfur-Sulfur cycle have been either demonstrated previously or demonstrated in this work. A theoretical heat-to-hydrogen thermal efficiency is estimated to be 55% at a hot temperature of 1100 K and 59% at 2000 K. As a highly efficient, all-fluid based thermochemical cycle, the Sulfur-Sulfur cycle has great potential for feasible process implementation for the transformation of high quality heat to chemical energy.
Book Synopsis Hybrid Sulfur Thermochemical Process Development Annual Report by : William A. Summers
Download or read book Hybrid Sulfur Thermochemical Process Development Annual Report written by William A. Summers and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Hybrid Sulfur (HyS) Thermochemical Process is a means of producing hydrogen via water-splitting through a combination of chemical reactions and electrochemistry. Energy is supplied to the system as high temperature heat (approximately 900 C) and electricity. Advanced nuclear reactors (Generation IV) or central solar receivers can be the source of the primary energy. Large-scale hydrogen production based on this process could be a major contributor to meeting the needs of a hydrogen economy. This project's objectives include optimization of the HyS process design, analysis of technical issues and concerns, creation of a development plan, and laboratory-scale proof-of-concept testing. The key component of the HyS Process is the SO2-depolarized electrolyzer (SDE). Studies were performed that showed that an electrolyzer operating in the range of 500-600 mV per cell can lead to an overall HyS cycle efficiency in excess of 50%, which is superior to all other currently proposed thermochemical cycles. Economic analysis indicated hydrogen production costs of approximately $1.60 per kilogram for a mature nuclear hydrogen production plant. However, in order to meet commercialization goals, the electrolyzer should be capable of operating at high current density, have a long operating lifetime, and have an acceptable capital cost. The use of proton-exchange-membrane (PEM) technology, which leverages work for the development of PEM fuel cells, was selected as the most promising route to meeting these goals. The major accomplishments of this project were the design and construction of a suitable electrolyzer test facility and the proof-of-concept testing of a PEM-based SDE.
Book Synopsis Hydrogen Production from Nuclear Energy by : Greg F Naterer
Download or read book Hydrogen Production from Nuclear Energy written by Greg F Naterer and published by Springer Science & Business Media. This book was released on 2013-03-28 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the resurgence of nuclear power around the world, and the increasingly important role of hydrogen as a clean energy carrier, the utilization of nuclear energy for large-scale hydrogen production will have a key role in a sustainable energy future. Co-generation of both electricity and hydrogen from nuclear plants will become increasingly attractive. It enables load leveling together with renewable energy and storage of electricity in the form of hydrogen, when electricity prices and demand are lowest at off-peak hours of nuclear plants, such as overnight. Hydrogen Production from Nuclear Energy provides an overview of the latest developments and methods of nuclear based hydrogen production, including electrolysis and thermochemical cycles. Particular focus is given to thermochemical water splitting by the copper-chlorine and sulphur-based cycles. Cycle configurations, equipment design, modeling and implementation issues are presented and discussed. The book provides the reader with an overview of the key enabling technologies towards the design and industrialization of hydrogen plants that are co-located and linked with nuclear plants in the future. The book includes illustrations of technology developments, tables that summarize key features and results, overviews of recent advances and new methods of nuclear hydrogen production. The latest results from leading authorities in the fields will be presented, including efficiencies, costs, equipment design, and modeling.
Book Synopsis Chemical Engineering Design by : Gavin Towler
Download or read book Chemical Engineering Design written by Gavin Towler and published by Elsevier. This book was released on 2012-01-25 with total page 1321 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical Engineering Design, Second Edition, deals with the application of chemical engineering principles to the design of chemical processes and equipment. Revised throughout, this edition has been specifically developed for the U.S. market. It provides the latest US codes and standards, including API, ASME and ISA design codes and ANSI standards. It contains new discussions of conceptual plant design, flowsheet development, and revamp design; extended coverage of capital cost estimation, process costing, and economics; and new chapters on equipment selection, reactor design, and solids handling processes. A rigorous pedagogy assists learning, with detailed worked examples, end of chapter exercises, plus supporting data, and Excel spreadsheet calculations, plus over 150 Patent References for downloading from the companion website. Extensive instructor resources, including 1170 lecture slides and a fully worked solutions manual are available to adopting instructors. This text is designed for chemical and biochemical engineering students (senior undergraduate year, plus appropriate for capstone design courses where taken, plus graduates) and lecturers/tutors, and professionals in industry (chemical process, biochemical, pharmaceutical, petrochemical sectors). New to this edition: Revised organization into Part I: Process Design, and Part II: Plant Design. The broad themes of Part I are flowsheet development, economic analysis, safety and environmental impact and optimization. Part II contains chapters on equipment design and selection that can be used as supplements to a lecture course or as essential references for students or practicing engineers working on design projects. New discussion of conceptual plant design, flowsheet development and revamp design Significantly increased coverage of capital cost estimation, process costing and economics New chapters on equipment selection, reactor design and solids handling processes New sections on fermentation, adsorption, membrane separations, ion exchange and chromatography Increased coverage of batch processing, food, pharmaceutical and biological processes All equipment chapters in Part II revised and updated with current information Updated throughout for latest US codes and standards, including API, ASME and ISA design codes and ANSI standards Additional worked examples and homework problems The most complete and up to date coverage of equipment selection 108 realistic commercial design projects from diverse industries A rigorous pedagogy assists learning, with detailed worked examples, end of chapter exercises, plus supporting data and Excel spreadsheet calculations plus over 150 Patent References, for downloading from the companion website Extensive instructor resources: 1170 lecture slides plus fully worked solutions manual available to adopting instructors
