![Upgrading and Slurryfication [sic] of Low Rank Coals PDF](https://books.google.com/books/content/images/frontcover/7oRwuAAACAAJ?fife=w150-h200)
Author: Hiromoto UsuiPublisher:
ISBN:
Category :
Languages : en
Pages : 176
Book Description
Upgrading and Slurryfication [sic] of Low Rank Coals
![Upgrading and Slurryfication [sic] of Low Rank Coals PDF](https://books.google.com/books/content/images/frontcover/7oRwuAAACAAJ?fife=w80-h100)
Author: Hiromoto UsuiUpgrading of Low-rank Coals
Author: Upgrading of Low-rank Coals
Author: Thermal Upgrading of Low-rank Coal
Author: M. V. K. ChariPublisher:
ISBN:
Category : Coal gasification
Languages : en
Pages :
Book Description
Liquefaction of Low Rank Coals with Slurry Catalysts
Author: Gulf Research & Development CoPublisher:
ISBN:
Category : Catalysts
Languages : en
Pages :
Book Description
Upgraded Low-rank Coal User Guidelines
Author: Upgrading Low Rank Coal Using the Koppelman Series C Process
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 15
Book Description
Development of the K-Fuel technology began after the energy shortage of the early 1970s in the United States led energy producers to develop the huge deposits of low-sulfur coal in the Powder River Basin (PRB) of Wyoming. PRB coal is a subbituminous C coal containing about 30 wt % moisture and having heating values of about 18.6 megajoules/kg (8150 Btu/lb). PRB coal contains from 0.3 to 0.5 wt % sulfur, which is nearly all combined with the organic matrix in the coal. It is in much demand for boiler fuel because of the low-sulfur content and the low price. However, the low-heating value limits the markets for PRB coal to boilers specially designed for the high- moisture coal. Thus, the advantages of the low-sulfur content are not available to many potential customers having boilers that were designed for bituminous coal. This year about 250 million tons of coal is shipped from the Powder River Basin of Wyoming. The high- moisture content and, consequently, the low-heating value of this coal causes the transportation and combustion of the coal to be inefficient. When the moisture is removed and the heating value increased the same bundle of energy can be shipped using one- third less train loads. Also, the dried product can be burned much more efficiently in boiler systems. This increase in efficiency reduces the carbon dioxide emissions caused by use of the low-heating value coal. Also, the processing used to remove water and restructure the coal removes sulfur, nitrogen, mercury, and chlorides from the coal. This precombustion cleaning is much less costly than stack scrubbing. PRB coal, and other low-rank coals, tend to be highly reactive when freshly mined. These reactive coals must be mixed regularly (every week or two) when fresh, but become somewhat more stable after they have aged for several weeks. PRB coal is relatively dusty and subject to self-ignition compared to bituminous coals. When dried using conventional technology, PRB coal is even more dusty and more susceptible to spontaneous combustion than the raw coal. Also, PRB coal, if dried at low temperature, typically readsorbs about two- thirds of the moisture removed by drying. This readsorption of moisture releases the heat of adsorption of the water which is a major cause of self- heating of low-rank coals at low temperature.
A Process Investigation of the Biosolubilisation of Low Rank Coal in Slurry System
Author: Bilainu Obozokhai OboirienPublisher:
ISBN:
Category :
Languages : en
Pages : 334
Book Description
Low-rank Coals for Power Generation, Fuel and Chemical Production
Author: Zhongyang LuoPublisher: Woodhead Publishing
ISBN: 0081009291
Category : Technology & Engineering
Languages : en
Pages : 367
Book Description
Low-Rank Coals for Power Generation, Fuel and Chemical Production provides a thorough introduction to lignite (brown coal) and subbituminous coals and explores how they can be used efficiently and economically in place of hard coal. The book examines the undesirable characteristics of low-quality coals, such as high moisture content, low calorific value, and aggressive ash characteristics, and the resulting refinements to standard technologies and practices required for successful combustion, gasification, and pyrolysis.The first part of this book provides a comprehensive and systematic review of the properties of low-rank coals and corresponding preparation methods, such as drying, cleaning, and upgrading. Power generation from low-rank coals is the focus of Part 2, with chapter topics ranging from high efficiency pulverized coal combustion and circulatingfluidized bed combustion to emerging areas such as chemical looping and oxyfuel combustion. The final contributions address the important subjects of coal-to-liquids,polygeneration and coke production using low-rank coals, as well as the critical issue of carbon capture and storage.This book is a valuable resource for power generation engineers and researchers seeking to maximize the opportunities provided by these cheaper coal feedstocks for efficient and environmentally compatible power generation. Presents the most in-depth treatment of low-rank coals available Addresses both power generation and fuel production Includes coverage that spans pulverized coal combustion and emerging technologies, such as CFBC, UCG, CLC, and oxyfuel combustion
Solar Drying of Low Rank Coal Slurries: Carbonisation of solar dried coal slurry
Author: Fedir WoskoboenkoPublisher:
ISBN: 9780724165988
Category : Char
Languages : en
Pages : 234
Book Description