Desulfurization Of Hot Coal Gas
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Desulfurization Of Hot Coal Gas
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Author : Aysel T. Atimtay
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29
Desulfurization Of Hot Coal Gas written by Aysel T. Atimtay 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 2013-06-29 with Technology & Engineering categories.
Economic and environmental requirements for advanced power generating systems demand the removal of corrosive and other sulfurous compounds from hot coal gas. After a brief account of the world energy resources and an overview of clean coal technologies, a review of regenerable metal oxide sorbents for cleaning the hot gas is provided. Zinc oxide, copper oxide, calcium oxide, manganese oxide based as well as supported and mixed metal oxide sorbents are treated. Performance analysis of these sorbents, effects of various parameters on the desulfurization efficiency, kinetics of sulfidation and regeneration reactions, sulfiding and regeneration mechanisms are discussed. Two chapters present recent results in the direct production of elemental sulfur from regeneration or SO2-rich gases.
Desulfurization Of Hot Coal Derived Fuel Gases With Manganese Based Regenerable Sorbents
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Author : Rachid Ben Slimane
language : en
Publisher:
Release Date : 1994
Desulfurization Of Hot Coal Derived Fuel Gases With Manganese Based Regenerable Sorbents written by Rachid Ben Slimane and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
Desulfurization Of Hot Coal Gas In A Fluidized Bed With Regenerable Zinc Titanate Sorbents
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Author : Wahab Mojtahedi
language : en
Publisher:
Release Date : 1994
Desulfurization Of Hot Coal Gas In A Fluidized Bed With Regenerable Zinc Titanate Sorbents written by Wahab Mojtahedi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Coal categories.
Hot Coal Gas Desulfurization With Manganese Based Sorbents
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Author :
language : en
Publisher:
Release Date : 1995
Hot Coal Gas Desulfurization With Manganese Based Sorbents written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
The primary major deposit of manganese in the US which can be readily mined by an in situ process is located in the Emily district of Minnesota. The US Bureau of Mines Research Centers at both the Twin Cities and Salt Lake City have developed a process for extracting and refining manganese in the form of a high-purity carbonate product. This product has been formulated into pellets by a multi-step process of drying, calcination, and induration to produce relatively high-strength formulations which are capable of being used for hot fuel gas desulfurization. These pellets, which have been developed at the University of Minnesota under joint sponsorship of the US Department of Energy and the US Bureau of Mines, appear superior to other, more expensive, formulations of zinc titanate and zinc ferrite which have previously been studied for multi-cycle loading (desulfurization) and regeneration (evolution of high-strength SO2 and restoration of pellet reactivity). Although these other formulations have been under development for the past twelve years, their prices still exceed $7 per pound. If manganese pellets perform as predicted in fixed bed testing, and if a significant number of utilities which burn high-sulfur coals incorporate combined-cycle gasification with hot coal gas desulfurization as a viable means of increasing conversion efficiencies, then the potential market for manganese pellets may be as high as 200,000 tons per year at a price not less than $3 per pound. This paper discusses the role of manganese pellets in the desulfurization process with respect to the integrated gasification combined-cycle (IGCC) for power generation.
Desulfurization Of Hot Fuel Gas Produced From High Chlorine Illinois Coals
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Author :
language : en
Publisher:
Release Date : 1991
Desulfurization Of Hot Fuel Gas Produced From High Chlorine Illinois Coals written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
New coal gasification processes are now being developed which can generate electricity with high thermal efficiency either in a combined gas-turbine, steam-turbine cycle or in a fuel cell. Both of these coal-to-electricity pathways require that the coal-derived fuel gas be at a high temperature and be free of potential pollutants, such as sulfur compounds. Unfortunately, some high-sulfur Illinois coals also contain significant chlorine which converts into hydrogen chloride (HC1) in the coal-gas. This project investigates the effect of HC1, in concentrations typical of a gasifier fed by high-chlorine Illinois coals, on zinc-titanate sorbents that are currently being developed for H2S and COS removal from hot coal-gas. This study is designed to identify any deleterious changes in the sorbent caused by the HC1, both in adsorptive operation and in the regeneration cycle, and will pave the way to modify the sorbent formulation or the process operating procedure to remove HC1 along with the H2S and COS from the coal-gas. This will negate any harmful consequences of utilizing high-chlorine Illinois in these processes. The bench- scale fluidized bed has been modified to prevent potential HC1 corrosion and startup experiments have proven the reactor system operable and capable of yielding reliable experimental results. The first of the planned experiments in the project are now being performed. 1 fig.
Desulfurization Of A Simulated Hot Coal Gas Using A Manganese Based Sorbent
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Author : Kathleen Alison Joanna Sadecki
language : en
Publisher:
Release Date : 1997
Desulfurization Of A Simulated Hot Coal Gas Using A Manganese Based Sorbent written by Kathleen Alison Joanna Sadecki and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Coal categories.
Reactivity And Pore Structure Changes In Hot Coal Gas Desulfurization Sorbents
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Author : Evangelos A. Efthimiadis
language : en
Publisher:
Release Date : 1991
Reactivity And Pore Structure Changes In Hot Coal Gas Desulfurization Sorbents written by Evangelos A. Efthimiadis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
Enhanced Sorbent Durability For Hot Coal Gas Desulfurization
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Author : M. C. Jha
language : en
Publisher:
Release Date : 1986
Enhanced Sorbent Durability For Hot Coal Gas Desulfurization written by M. C. Jha and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
Pore Structure And Reactivity Changes In Hot Coal Gas Desulfurization Sorbents
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Author :
language : en
Publisher:
Release Date : 1991
Pore Structure And Reactivity Changes In Hot Coal Gas Desulfurization Sorbents written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
The primary objective of the project was the investigation of the pore structure and reactivity changes occurring in metal/metal oxide sorbents used for desulfurization of hot coal gas during sulfidation and regeneration, with particular emphasis placed on the effects of these changes on the sorptive capacity and efficiency of the sorbents. Commercially available zinc oxide sorbents were used as model solids in our experimental investigation of the sulfidation and regeneration processes.
Long Term Testing Of The Zinc Titanate For Desulfurization Of Hot Coal Gas In A Fluidized Bed Reactor
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Author :
language : en
Publisher:
Release Date : 1993
Long Term Testing Of The Zinc Titanate For Desulfurization Of Hot Coal Gas In A Fluidized Bed Reactor written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.
Research Triangle Institute (RTI) under contract to the US Department of Energy (DOE), Morgantown energy Technology Center has recently completed a long-term test consisting of 100 sulfidation-regeneration cycles on a zinc titanate material intended for use as a high-temperature, regenerable sorbent to desulfurize coal-derived gas. The primary motivation for this development is to generate a more economical, environmentally superior, and reliable process to purify the product gas of coal gasifiers for use in gas turbines and fuel cells. This zinc titanate formulation (designated as ZT-4 and containing Zn-to-Ti in a molar ratio of 1.5) exhibited the best overall performance in terms of chemical reactivity, sulfur capacity, regenerability, structural properties and, most importantly, the attrition resistance based on multicycle testing of a number of sorbent formulations in a bench scale fluidized-bed reactor. The conditions in the test were -- desulfurization temperature: 750C (1382F); pressure: 1.52 MPa (220 psia); coal gas: simulated Texaco entrained-bed oxygen-blown gasifier gas containing 12,000 ppmv of H2S; superficial gas velocity: 15 cm/s (0.49 ft/s). The ZT-4 sorbent used in this test was prepared using a granulation technique and 500 g of the sorbent in the 100 to 300 microns particle diameter range were used in a 5.1-cm (2-inch) i.d. stainless steel reactor.