Underground Gasification of Coal with Oxygen-enriched Air PDF Download

Author: John P. Capp
Publisher:
ISBN:
Category : Coal gasification, Underground
Languages : en
Pages : 22

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Author: J. P. Capp
Publisher:
ISBN:
Category :
Languages : en
Pages : 14

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Russian and Polish steam-oxygen and steam-enriched-air gasification experiments are analyzed. These experiments were operated for a month or more, consumed up to 20,000 tons of coal, and apparently were conducted with no insurmountable problems. Almost twice as much oxygen per unit weight of coal was required than is used for Lurgi steam-oxygen gasification. The results suggest that a medium-Btu gas suitable for upgrading to pipeline quality gas or for the production of methanol, ammonia, or other chemicals can be obtained from underground coal gasification, particularly if steam-oxygen rather than enriched air and steam is used. The following gas quality was obtained (on a nitrogen-free basis): CH4, 2-6 percent; H2, 37-42 percent; CO, 18-27 percent; CO2, 25-34 percent. The higher heating value of the gas was 220 to 270 Btu/scf. Equilibrium reaction temperatures near 900 K (1160°F) were calculated from the product-gas analyses. These low temperatures together with the high consumption of oxygen, suggest some bypassing of oxidants and secondary oxidation of product gases, in addition to some fairly substantial heat losses underground.

Author: Michael S. Blinderman
Publisher: Woodhead Publishing
ISBN: 0081003242
Category : Technology & Engineering
Languages : en
Pages : 664

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Underground Coal Gasification (UCG) is carried out in unmined coal seams, using wells drilled from the surface and converting coal into synthesis gas. The gas can be used for power generation and synthesis of automotive fuels, fertilizers and other products. UCG offers financial, social, and environmental benefits over conventional coal extraction and utilization methods and may play a critical role in ensuring energy security in the future. Underground Coal Gasification and Combustion provides an overview of underground coal gasification technology, its current status and future directions. Comprehensive in approach, the book covers history, science, technology, hydrogeology, rock mechanics, environmental performance, economics, regulatory and commercial aspects of UCG projects. The first book on the subject in forty years, it is unique in analysing more than a century of global UCG developments by experts from Australia, Canada, Poland, Russia, Ukraine, United Kingdom, the USA and Uzbekistan. - Provides researchers, engineers, industry, educators and regulators with an authoritative overview of science and practical applications of underground coal gasification technologies - Offers insight into efficiency, environmental performance, costs, permitting issues and commercial aspects of UCG projects - Written by scientists and practitioners of UCG technology sharing hands-on experience of step-by-step UCG implementation

Author: John P. Capp
Publisher:
ISBN:
Category : Coal gasification, Underground
Languages : en
Pages : 242

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Author: John P. Capp
Publisher:
ISBN:
Category : Coal gasification
Languages : en
Pages : 22

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Author: James J. Dowd
Publisher:
ISBN:
Category : Coal gasification, Underground
Languages : en
Pages : 182

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Author: George H. Lamb
Publisher: Noyes Data Corporation/Noyes Publications
ISBN:
Category : Coal gasification, Underground
Languages : en
Pages : 280

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Author: David A. Bell
Publisher: William Andrew
ISBN: 1437778518
Category : Science
Languages : en
Pages : 414

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Skyrocketing energy costs have spurred renewed interest in coal gasification. Currently available information on this subject needs to be updated, however, and focused on specific coals and end products. For example, carbon capture and sequestration, previously given little attention, now has a prominent role in coal conversion processes.This book approaches coal gasification and related technologies from a process engineering point of view, with topics chosen to aid the process engineer who is interested in a complete, coal-to-products system. It provides a perspective for engineers and scientists who analyze and improve components of coal conversion processes.The first topic describes the nature and availability of coal. Next, the fundamentals of gasification are described, followed by a description of gasification technologies and gas cleaning processes. The conversion of syngas to electricity, fuels and chemicals is then discussed. Finally, process economics are covered. Emphasis is given to the selection of gasification technology based on the type of coal fed to the gasifier and desired end product: E.g., lower temperature gasifiers produce substantial quantities of methane, which is undesirable in an ammonia synthesis feed. This book also reviews gasification kinetics which is informed by recent papers and process design studies by the US Department of Energy and other groups, and also largely ignored by other gasification books.• Approaches coal gasification and related technologies from a process engineering point of view, providing a perspective for engineers and scientists who analyze and improve components of coal conversion processes • Describes the fundamentals of gasification, gasification technologies, and gas cleaning processes • Emphasizes the importance of the coal types fed to the gasifier and desired end products • Covers gasification kinetics, which was largely ignored by other gasification books - Provides a perspective for engineers and scientists who analyze and improve components of the coal conversion processes - Describes the fundamentals of gasification, gasification technologies, and gas cleaning processes - Covers gasification kinetics, which was largely ignored by other gasification books

Author: James Lowry Elder
Publisher:
ISBN:
Category : Coal gasification, Underground
Languages : en
Pages : 112

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