Author: As Suhatri Arief
Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages :

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Book Description

Author: National Research Council
Publisher: National Academies Press
ISBN: 030911022X
Category : Science
Languages : en
Pages : 183

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Book Description
Coal will continue to provide a major portion of energy requirements in the United States for at least the next several decades. It is imperative that accurate information describing the amount, location, and quality of the coal resources and reserves be available to fulfill energy needs. It is also important that the United States extract its coal resources efficiently, safely, and in an environmentally responsible manner. A renewed focus on federal support for coal-related research, coordinated across agencies and with the active participation of the states and industrial sector, is a critical element for each of these requirements. Coal focuses on the research and development needs and priorities in the areas of coal resource and reserve assessments, coal mining and processing, transportation of coal and coal products, and coal utilization.

Author: V. M. Malhotra
Publisher:
ISBN:
Category : Coal
Languages : en
Pages : 158

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Author: Eugene McAuliffe
Publisher:
ISBN:
Category : Coal
Languages : en
Pages : 496

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Author: U.S. National Committee for Geochemistry. Panel on the Trace Element Geochemistry of Coal Resource Development Related to Health
Publisher: National Academy Press
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 172

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Book Description

Author: Great Britain. Home Office. Departmental Committee on Spontaneous Combustion of Coal in Mines
Publisher:
ISBN:
Category : Mine fires
Languages : en
Pages : 268

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Book Description

Author: S.C. Banerjee
Publisher: CRC Press
ISBN: 9789061915744
Category : Technology & Engineering
Languages : en
Pages : 168

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

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Book Description
Spontaneous combustion has always been a problem in coal utilization especially in the storage and transportation of coal. In the United States, approximately 11% of underground coal mine fires are attributed to spontaneous coal combustion. The incidence of such fires is expected to increase with increased consumption of lower rank coals. The cause is usually suspected to be the reabsorption of moisture and oxidation. To understand the mechanisms of spontaneous combustion this study was conducted to (1) define the initial and final products during the low temperature (10 to 60 C) oxidation of coal at different partial pressures of O2, (2) determine the rate of oxidation, and (3) measure the reaction enthalpy. The reaction rate (R) and propensity towards spontaneous combustion were evaluated in terms of the initial rate method for the mass gained due to adsorbed O2. Equipment that was used consisted of a FT-IR (Fourier Transform-Infrared Spectrometer, Perkin Elmer), an accelerated surface area porosimeter (ASAP, Micromeritics model 2010), thermogravimetric analyzer (TGA, Cahn Microbalance TG 121) and a differential scanning calorimeter (DSC, Q1000, thermal analysis instruments). Their combination yielded data that established a relation between adsorption of oxygen and reaction enthalpy. The head space/ gas chromatograph/ mass spectrometer system (HS/GC/MS) was used to identify volatiles evolved during oxidation. The coal samples used were Beulah lignite and Wyodak (sub-bituminous). Oxygen (O2) absorption rates ranged from 0.202 mg O2/mg coal hr for coal sample No. 20 (Beulah pyrolyzed at 300 C) to 6.05 mg O2/mg coal hr for coal sample No. 8 (wyodak aged and pyrolyzed at 300 C). Aging of coal followed by pyrolysis was observed to contribute to higher reaction rates. Reaction enthalpies ranged from 0.42 to 1580 kcal/gm/mol O2.

Author: Samuel Wilson Parr
Publisher: Hardpress Publishing
ISBN: 9781290126618
Category :
Languages : en
Pages : 102

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Book Description
Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.

Author: Arthur Joseph Hoskin
Publisher:
ISBN:
Category : Coal
Languages : en
Pages : 61

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Book Description