Hydrogen Production Via A Sulfur Sulfur Thermochemical Water Splitting Cycle

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Hydrogen Production Via a Sulfur-sulfur Thermochemical Water-splitting Cycle

Author : Nicholas J. AuYeung
Publisher :
ISBN 13 :
Total Pages : 113 pages
Book Rating : 4.:/5 (761 download)

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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.

Detailed Analysis of the Hydrogen Sulfide Production Step in a Sulfur-sulfur Thermochemical Water Splitting Cycle

Author : Kevin R. Caple
Publisher :
ISBN 13 :
Total Pages : 125 pages
Book Rating : 4.:/5 (872 download)

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Book Synopsis Detailed Analysis of the Hydrogen Sulfide Production Step in a Sulfur-sulfur Thermochemical Water Splitting Cycle by : Kevin R. Caple

Download or read book Detailed Analysis of the Hydrogen Sulfide Production Step in a Sulfur-sulfur Thermochemical Water Splitting Cycle written by Kevin R. Caple and published by . This book was released on 2014 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: The production of hydrogen has been one of the most heavily studied, energy related fields over the past half century, yet few methods are commercially or economically viable and none are currently sustainable. Of those aiming at the sustainable production of hydrogen using renewable resources, perhaps the most widely studied are those attempting to thermochemically split water via various chemical intermediates. These provide an attractive conceptual alternative to other methods due to lower energy input requirements and to the production of the targeted hydrogen and oxygen in separate reaction steps. One of the most widely studied thermochemical cycles is the Sulfur-Iodine cycle, the development of which has recently slowed due to the difficulty in the separation of hydrogen iodine from a hydrogen iodide-iodine-water azeotrope, material compatibility issues, and the perceived need use large amounts of iodine in the process. A modification of the Sulfur-Iodine thermochemical cycle that attempts to avoid those issues along with mitigating the need to process large amounts of water in the cycle was developed, in a cycle we describe as the Sulfur-Sulfur cycle. This new thermochemical cycle can be summarized by the reaction sequence shown below. [see abstract for chemical reactions] Previous work in our group demonstrated the viability of implementing the cycle's low temperature reactions (the first reaction pair, which we call the Bunsen reaction and the Hydrogen Sulfide Production (HSP) reactions) in ionic liquids, which removes the need to process large amounts of water and iodine in the reaction sequence, and minimizes the material compatibility issues, and also demonstrated the feasibility of stream reforming hydrogen sulfide. The present work focuses on an exergetic analysis of the Sulfur-Sulfur cycle, the careful determination of reaction kinetics for the HSP reaction, and developing a model of the kinetics of the low temperature reactions. The exergetic analysis was carried out based on the published thermochemical parameters for the species involved. The analysis showed that the maximum theoretical exergetic efficiency of the Sulfur-Sulfur cycle is nearly 70% with a strong dependence on the reaction temperature of the low temperature reactions. The kinetics of the Bunsen and HSP were investigated through iodine colorimetery and the effect of water was determined. This kinetic data was used for the development of a predictive kinetic model that could accurately monitor the progression of iodine through the reaction system. The work showed that the Bunsen reaction is very fast with an activation energy (E[subscript aB]) of 92.83 kJ/mol and a pre-exponential factor (k0) of 7.65E+14 min−1, while for the HSP reaction, they were determined to be 117.09 kJ/mole and 7.73E+16 min−1. Integration of these two reactions into a single differential model based on iodine concentration fit the experimental profile extremely well The effect of including a Lewis base other than water in the reaction mixture yielded promising results that warrant future development. Specifically, the rates of both the Bunsen and HSP reactions increased with an increase in the pK[subscript b] of the added Lewis base. A local protocol to recycle the ionic liquid, enabling it to be reused in new experiments, was successfully developed. When the recycled ionic liquid is employed, effects similar to those found through the inclusion of the Lewis base were observed, suggesting that a decomposition product remains in the recycled ionic liquid. This effect could be minimized by acid washing the recycled ionic liquid prior to use.

Sustainable Hydrogen Production

Author : Ibrahim Dincer
Publisher : Elsevier
ISBN 13 : 0128017481
Total Pages : 494 pages
Book Rating : 4.1/5 (28 download)

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Book Synopsis Sustainable Hydrogen Production by : Ibrahim Dincer

Download or read book Sustainable Hydrogen Production written by Ibrahim Dincer and published by Elsevier. This book was released on 2016-08-05 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable Hydrogen Production provides readers with an introduction to the processes and technologies used in major hydrogen production methods. This book serves as a unique source for information on advanced hydrogen generation systems and applications (including integrated systems, hybrid systems, and multigeneration systems with hydrogen production). Advanced and clean technologies are linked to environmental impact issues, and methods for sustainable development are thoroughly discussed. With Earth’s fast-growing populations, we face the challenge of rapidly rising energy needs. To balance these we must explore more sustainable methods of energy production. Hydrogen is one key sustainable method because of its versatility. It is a constituent of a large palette of essential materials, chemicals, and fuels. It is a source of power and a source of heat. Because of this versatility, the demand for hydrogen is sure to increase as we aim to explore more sustainable methods of energy. Furthermore, Sustainable Hydrogen Production provides methodologies, models, and analysis techniques to help achieve better use of resources, efficiency, cost-effectiveness, and sustainability. The book is intellectually rich and interesting as well as practical. The fundamental methods of hydrogen production are categorized based on type of energy source: electrical, thermal, photonic, and biochemical. Where appropriate, historical context is introduced. Thermodynamic concepts, illustrative examples, and case studies are used to solve concrete power engineering problems. Addresses the fundamentals of hydrogen production using electrical, thermal, photonic, and biochemical energies Presents new models, methods, and parameters for performance assessment Provides historical background where appropriate Outlines key connections between hydrogen production methods and environmental impact/sustainable development Provides illustrative examples, case studies, and study problems within each chapter

Using a Membrane Reactor for the Sulfur-sulfur Thermochemical Water-splitting Cycle

Author : Nathan Michael Knapp
Publisher :
ISBN 13 :
Total Pages : 78 pages
Book Rating : 4.:/5 (771 download)

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Book Synopsis Using a Membrane Reactor for the Sulfur-sulfur Thermochemical Water-splitting Cycle by : Nathan Michael Knapp

Download or read book Using a Membrane Reactor for the Sulfur-sulfur Thermochemical Water-splitting Cycle written by Nathan Michael Knapp and published by . This book was released on 2012 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: The hydrogen economy is a possible component of an energy future based on use of alternative and renewable energy sources, deemed desirable from the general consensus of the worldwide community that we do not want to further exacerbate the climate problems that we have introduced over the last two centuries from burning fossil fuels. The burning of fossil fuels emits toxic pollutants into the air, such as sulfur compounds and oxidized forms of nitrogen (NOx) but also emit copious amounts of the inert carbon dioxide. The latter is widely recognized as the major cause of the global warming phenomenon. For a hydrogen economy to develop, efficient means of hydrogen generation are required. Thermochemical cycles were conceived in the 1960s but only one operating pilot plant and no commercial installations based on the processes have been built. In the present work the use of a membrane reactor to enable the newly conceived Sulfur-Sulfur cycle, based on equations 1 - 3 is modeled.

Hydrogen Production by the GA Sulfur-iodine Process

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis Hydrogen Production by the GA Sulfur-iodine Process by :

Download or read book Hydrogen Production by the GA Sulfur-iodine Process written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A summary of the progress of the overall total development effort of the General Atomic (GA) sulfur-iodine thermochemical water-splitting cycle over the last two years is reported. The major accomplishments have been the following: (1) Significant improvements in the chemistry of the process. (2) Development, review, and revision of an engineering flowsheet, resulting in a thermal process efficiency of 47%. (3) Screening, identification, and testing of potential materials-of-construction for the corrosive process fluids. (4) Small-scale demonstration of the cycle in a closed loop under recycle conditions. (5) Installation of bench-scale equipment and demonstration of parts of the process in this system. (6) Development of a conceptual, preliminary flowsheet for the GA sulfur-iodine cycle driven by solar energy. The results of the work carried out during the last two years have demonstrated that thermochemical water splitting by the sulfur-iodine cycle is a feasible process and have provided confidence that thermal efficiencies in the range of 50% are achievable.

Hydrogen Production Technologies

Author : Mehmet Sankir
Publisher : John Wiley & Sons
ISBN 13 : 1119283655
Total Pages : 653 pages
Book Rating : 4.1/5 (192 download)

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Book Synopsis Hydrogen Production Technologies by : Mehmet Sankir

Download or read book Hydrogen Production Technologies written by Mehmet Sankir and published by John Wiley & Sons. This book was released on 2017-03-20 with total page 653 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a comprehensive practical review of the new technologies used to obtain hydrogen more efficiently via catalytic, electrochemical, bio- and photohydrogen production. Hydrogen has been gaining more attention in both transportation and stationary power applications. Fuel cell-powered cars are on the roads and the automotive industry is demanding feasible and efficient technologies to produce hydrogen. The principles and methods described herein lead to reasonable mitigation of the great majority of problems associated with hydrogen production technologies. The chapters in this book are written by distinguished authors who have extensive experience in their fields, and readers will have a chance to compare the fundamental production techniques and learn about the pros and cons of these technologies. The book is organized into three parts. Part I shows the catalytic and electrochemical principles involved in hydrogen production technologies. Part II addresses hydrogen production from electrochemically active bacteria (EAB) by decomposing organic compound into hydrogen in microbial electrolysis cells (MECs). The final part of the book is concerned with photohydrogen generation. Recent developments in the area of semiconductor-based nanomaterials, specifically semiconductor oxides, nitrides and metal free semiconductor-based nanomaterials for photocatalytic hydrogen production are extensively discussed.

Polygeneration with Polystorage

Author : Kaveh Rajab Khalilpour
Publisher : Academic Press
ISBN 13 : 0128133074
Total Pages : 583 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Polygeneration with Polystorage by : Kaveh Rajab Khalilpour

Download or read book Polygeneration with Polystorage written by Kaveh Rajab Khalilpour and published by Academic Press. This book was released on 2018-11-27 with total page 583 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polygeneration with Polystorage: For Energy and Chemicals addresses the problem of both traditional and dispersed generation with a broad, multidisciplinary perspective. As the first book to thoroughly focus on the topic of polygeneration, users will find the problem presented from different scientific and technical domains down to both macro and micro levels. Detailed analyses and state-of-the-art developments in specific fields are included, focusing on storage in conventional energy supply chains and demand-side renewable polygeneration systems, management advice and the necessary market mechanisms needed to support them. This reference is useful for academics and professionals in conventional and unconventional energy systems. Includes an outlined framework towards polygeneration and polystorage down to both micro and macro levels Contains fluid and continuous chapters that provide detailed analysis and a review of the state-of-the-art developments in specific fields Addresses the wider global view of research advancement and potential in the role of polygeneration and polystorage in the move toward sustainability

Nuclear Hydrogen Production Handbook

Author : Xing L. Yan
Publisher : CRC Press
ISBN 13 : 1439810842
Total Pages : 939 pages
Book Rating : 4.4/5 (398 download)

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Book Synopsis Nuclear Hydrogen Production Handbook by : Xing L. Yan

Download or read book Nuclear Hydrogen Production Handbook written by Xing L. Yan and published by CRC Press. This book was released on 2016-04-19 with total page 939 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by two leading researchers from the world-renowned Japan Atomic Energy Agency, the Nuclear Hydrogen Production Handbook is an unrivalled overview of current and future prospects for the effective production of hydrogen via nuclear energy. Combining information from scholarly analyses, industrial data, references, and other resources, this h

Solar Hydrogen Generation

Author : Krishnan Rajeshwar
Publisher : Springer Science & Business Media
ISBN 13 : 0387728104
Total Pages : 329 pages
Book Rating : 4.3/5 (877 download)

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Book Synopsis Solar Hydrogen Generation by : Krishnan Rajeshwar

Download or read book Solar Hydrogen Generation written by Krishnan Rajeshwar and published by Springer Science & Business Media. This book was released on 2008-02-21 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: Given the backdrop of intense interest and widespread discussion on the prospects of a hydrogen energy economy, this book aims to provide an authoritative and up-to-date scientific account of hydrogen generation using solar energy and renewable sources such as water. While the technological and economic aspects of solar hydrogen generation are evolving, the scientific principles underlying various solar-assisted water splitting schemes already have a firm footing. This book aims to expose a broad-based audience to these principles. This book spans the disciplines of solar energy conversion, electrochemistry, photochemistry, photoelectrochemistry, materials chemistry, device physics/engineering, and biology.

Hydrogen Production from Nuclear Energy

Author : Greg F Naterer
Publisher : Springer Science & Business Media
ISBN 13 : 1447149386
Total Pages : 506 pages
Book Rating : 4.4/5 (471 download)

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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.

Hybrid Sulfur Thermochemical Process Development Annual Report

Author : William A. Summers
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (316 download)

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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.

The Hydrogen Economy

Author : National Academy of Engineering
Publisher : National Academies Press
ISBN 13 : 0309091632
Total Pages : 257 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis The Hydrogen Economy by : National Academy of Engineering

Download or read book The Hydrogen Economy written by National Academy of Engineering and published by National Academies Press. This book was released on 2004-09-05 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: The announcement of a hydrogen fuel initiative in the President's 2003 State of the Union speech substantially increased interest in the potential for hydrogen to play a major role in the nation's long-term energy future. Prior to that event, DOE asked the National Research Council to examine key technical issues about the hydrogen economy to assist in the development of its hydrogen R&D program. Included in the assessment were the current state of technology; future cost estimates; CO2 emissions; distribution, storage, and end use considerations; and the DOE RD&D program. The report provides an assessment of hydrogen as a fuel in the nation's future energy economy and describes a number of important challenges that must be overcome if it is to make a major energy contribution. Topics covered include the hydrogen end-use technologies, transportation, hydrogen production technologies, and transition issues for hydrogen in vehicles.

Solar Hydrogen Production

Author : Francesco Calise
Publisher : Academic Press
ISBN 13 : 0128148543
Total Pages : 586 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Solar Hydrogen Production by : Francesco Calise

Download or read book Solar Hydrogen Production written by Francesco Calise and published by Academic Press. This book was released on 2019-08-15 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solar Hydrogen Production: Processes, Systems and Technologies presents the most recent developments in solar-driven hydrogen generation methods. The book covers different hydrogen production routes, from renewable sources, to solar harvesting technologies. Sections focus on solar energy, presenting the main thermal and electrical technologies suitable for possible integration into solar-based hydrogen production systems and present a thorough examination of solar hydrogen technologies, ranging from solar-driven water electrolysis and solar thermal methods, to photo-catalytic and biological processes. All hydrogen-based technologies are covered, including data regarding the state-of-the art of each process in terms of costs, efficiency, measured parameters, experimental analyses, and demonstration projects. In the last part of the book, the role of hydrogen in the integration of renewable sources in electric grids, transportation sector, and end-user applications is assessed, considering their current status and future perspectives. The book includes performance data, tables, models and references to available standards. It is thus a key-resource for engineering researchers and scientists, in both academic and industrial contexts, involved in designing, planning and developing solar hydrogen systems. Offers a comprehensive overview of conventional and advanced solar hydrogen technologies, including simulation models, cost figures, R&D projects, demonstration projects, test standards, and safety and handling issues Encompasses, in a single volume, information on solar energy and hydrogen systems Includes detailed economic data on each technology for feasibility assessment of different systems

Hydrogen Supply Chain

Author : Catherine Azzaro-Pantel
Publisher : Academic Press
ISBN 13 : 0128111984
Total Pages : 588 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Hydrogen Supply Chain by : Catherine Azzaro-Pantel

Download or read book Hydrogen Supply Chain written by Catherine Azzaro-Pantel and published by Academic Press. This book was released on 2018-08-18 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design, Deployment and Operation of a Hydrogen Supply Chain introduces current energy system and the challenges that may hinder the large-scale adoption of hydrogen as an energy carrier. It covers the different aspects of a methodological framework for designing a HSC, including production, storage, transportation and infrastructure. Each technology’s advantages and drawbacks are evaluated, including their technology readiness level (TRL). The multiple applications of hydrogen for energy are presented, including use in fuel cells, combustion engines, as an alternative to natural gas and power to gas. Through analysis and forecasting, the authors explore deployment scenarios, considering the dynamic aspect of HSCs. In addition, the book proposes methods and tools that can be selected for a multi-criteria optimal design, including performance drivers and economic, environmental and societal metrics. Due to its systems-based approach, this book is ideal for engineering professionals, researchers and graduate students in the field of energy systems, energy supply and management, process systems and even policymakers. Explores the key drivers of hydrogen supply chain design and performance evaluation, including production and storage facilities, transportation, information, sourcing, pricing and sustainability Presents multi-criteria tools for the optimization of hydrogen supply chains and their integration in the overall energy system Examines the available technology, their strengths and weaknesses, and their technology readiness levels (TRL), to draw future perspectives of hydrogen markets and propose deployment scenarios Includes international case studies of hydrogen supply chains at various scales

A Continuous Solar Thermochemical Hydrogen Production Plant Design

Author : Wesley Wai Luc
Publisher :
ISBN 13 : 9781303241468
Total Pages : 154 pages
Book Rating : 4.2/5 (414 download)

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Book Synopsis A Continuous Solar Thermochemical Hydrogen Production Plant Design by : Wesley Wai Luc

Download or read book A Continuous Solar Thermochemical Hydrogen Production Plant Design written by Wesley Wai Luc and published by . This book was released on 2013 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: The sulfur-ammonia thermochemical water-splitting cycle for hydrogen production driven by solar thermal energy is a promising technology for large-scale commercial production of hydrogen. Hydrogen is an attractive alternative to fossil fuels because it is environmentally friendly, transportable, and can be manufactured. The process utilizes the electrolytic oxidation of aqueous ammonium sulfite in the hydrogen producing half-cycle and the thermal decomposition of molten potassium pyrosulfate and gaseous sulfur trioxide in the oxygen producing half-cycle. The thermochemical cycle is an all-fluid cycle driven by solar thermal energy captured from a heliostat array focused on a receiver and required electricity is generated internally from waste heat. The only input into the process is water, and the only products are oxygen and hydrogen gas. A sulfur-ammonia thermochemical plant was designed and modeled with a chemical process simulator, Aspen Plus. The plant was designed to operate continuously by using a phase-change thermal-storage system with NaCl which provides large thermal capacity at 800°C. The plant model generates ~1.7 X 105 kg of hydrogen per day, which is equivalent to ~268 MW thermal equivalent on a lower heating value basis, with a US Department of Energy efficiency of 13%. Various parameters, such as reactor operating temperature, plant pressure, and salt concentration, were varied to study to their effects on plant efficiency and performance. Plant cost estimation was also performed to estimate the projected costs of hydrogen to determine the viability of the sulfur-ammonia thermochemical plant.

Solar-Hydrogen Energy Systems

Author : Tokio Ohta
Publisher : Elsevier
ISBN 13 : 1483188426
Total Pages : 277 pages
Book Rating : 4.4/5 (831 download)

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Book Synopsis Solar-Hydrogen Energy Systems by : Tokio Ohta

Download or read book Solar-Hydrogen Energy Systems written by Tokio Ohta and published by Elsevier. This book was released on 2013-10-22 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solar-Hydrogen Energy Systems is a collection of papers that discusses the advancements in the research of alternative energy technologies that utilizes solar-hydrogen energy systems. The text first introduces the concept of solar-hydrogen energy system, and then proceeds to covering the technical topics in the subsequent chapters. The next chapters talks about the thermodynamics of water-splitting and water electrolysis. Next, the selection details direct thermal decomposition of water. The selection also discusses different processes to produce hydrogen, such as thermochemical, photochemical, and biochemical. The ninth chapter talks about solar energy storage by metal hydride, and the last chapter deals with direct solar energy conversion at sea. The book will be of great interest to scientists, engineers, and technicians involved in the research, development, and implementation of alternative energy technology.

Thermochemical Hydrogen Production with the Sulfur Dioxide-iodine Cycle by Utilization of Dipraseodymium Dioxymonosulfate as a Recycle Reagent

Download Thermochemical Hydrogen Production with the Sulfur Dioxide-iodine Cycle by Utilization of Dipraseodymium Dioxymonosulfate as a Recycle Reagent PDF Online Free

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (727 download)

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Book Synopsis Thermochemical Hydrogen Production with the Sulfur Dioxide-iodine Cycle by Utilization of Dipraseodymium Dioxymonosulfate as a Recycle Reagent by :

Download or read book Thermochemical Hydrogen Production with the Sulfur Dioxide-iodine Cycle by Utilization of Dipraseodymium Dioxymonosulfate as a Recycle Reagent written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Insoluble, dipraseodymium oxide-sulfite-sulfate-hydrates were prepared by reaction of dipraseodymium dioxymonosulfate with sulfur dioxide in aqueous media at 340°K. These compositions reacted with iodine to yield sulfate in the solid phase and hydrogen iodide in the gas phase. High yields of hydrogen iodide were measured at 770°K for a reaction time of ten minutes. Yields also depended on the sulfite content of the hydrate compositions, and were highest when the dipraseodymium dioxymonosulfate was 60% neutralized with sulfurous acid. An increased yield of hydrogen iodide was obtained by a second iodine oxidation after separation of the first gaseous products. A water splitting thermochemical cycle utilizing these reactions is described in which hydrogen is produced by catalytic decomposition of hydrogen iodide, and oxygen results from thermal decomposition of the solid product that also yields sulfur dioxide and dipraseodymium dioxymonosulfate for recycle.