Last edited by Gagami
Monday, July 20, 2020 | History

2 edition of Self heating properties of coal found in the catalog.

Self heating properties of coal

E. Braun

Self heating properties of coal

by E. Braun

  • 175 Want to read
  • 21 Currently reading

Published by U.S. Dept. of Commerce, National Bureau of Standards, National Engineering Laboratory, Center for Fire Research, National Technical Information Service, distributor in Gaithersburg, MD, [Springfield, VA .
Written in English

    Subjects:
  • Coal -- Combustion,
  • Combustion, Spontaneous,
  • Coal mines and mining -- Fires and fire prevention

  • Edition Notes

    StatementEmil Braun.
    SeriesNBSIR -- 87-3554., NBSIR -- 3554.
    ContributionsCenter for Fire Research (U.S.)
    The Physical Object
    Pagination1 v. (various pagings) :
    ID Numbers
    Open LibraryOL17675082M

    Effect of Intrinsic Coal Properties on Self-Heating Rates. PUBLISHED ON Ma To download the PDF, “Effect of Intrinsic Coal Properties on Self-Heating Rates,” click here. Thanks for the share, PMJ! Comments. Spread the word. Browse More Clips. Today's Quote. OSHA QuickTakes March Vol Issue ://   Geologists also classify coal types according to the organic debris, called macerals, from which the coal is formed. Macerals (microscopic organic constituents found in coal) are identified (microscopically) by reflected light - the reflective or translucent properties of the coal indicating the individual component macerals

    ASTM's coal and gas standards are instrumental in the testing and chemical analysis of coal, coke, natural gas and other gaseous fuels, as well as the combustion residues of coal and coke. The materials specifically covered by these standards can be in the form of lump coke, pulverized coal, bituminous coal, coke and coal ash, reformed gas, and Based on the special properties of bulk coal, this paper analyzed the latent defect of bulk coal, point out generation of methane gas, carbon monoxide gas and self heating are the main hazards which vessel will encountered, introduced how to check and monitor the condition of coal when en route, represent some useful preventive measurement in safe transport of bulk coal, it can improve

    The two main dangers to which owners should be alert are the emission of methane and self-heating. Coal carried in bulk can emit methane, a flammable gas, when mixed with air. Methane/air mixtures containing between as little as 5% - 16% methane may constitute an explosive atmosphere, which can easily be :// In book: International Conference on Emerging Trends in Engineering (ICETE), pp Coal self-heating leading to spontaneous ignition is an on-going safety and environmental issue for the


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Self heating properties of coal by E. Braun Download PDF EPUB FB2

of coal self-heating. Using analytical data from the late 19th century and combining it with modern predictive equations, the author demonstrated that the coal carried by sailing ships was extremely prone to self-heating and the situation was further aggravated by the conditions of the voyage.

Spontaneous combustion incidences increased when of coal to self-heat_cccpdf. Friability and previous oxidation of the coal are also important factors in the self‐heating (spontaneous combustion) process.

Directional properties also occur in coal and these properties can affect the direction of flow of gases. Furthermore, discontinuities in the coal structure give a COVID Resources.

Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus @article{osti_, title = {Self-heating of coal in barges}, author = {Riley, J.T.

and Reasoner, J.W. and Fatemi, S.M. and Yates, G.S.}, abstractNote = {Self-heating, or spontaneous heating, is a process which results in an increase in temperature of a thermally-isolated mass of coal or other combustible material.

This phenomenon is caused by the heat-generating chemical reaction between Over the past seven years a large database of coal self-heating rates under adiabatic conditions has been developed at The University of Queensland.

Coals have been tested from Australia (Queensland and New South Wales), New Zealand (North and South /Effect_of_intrinsic_coal_properties_on_self-heating_rates. This book explains how to understand, analyze and mitigate spontaneous coal combustion, offers preventive measures to mitigate the hazards of spontaneous coal combustion, and applies experimental techniques to investigate the chemical self-heating properties of  › Earth Sciences & Geography › Geochemistry.

CONTENTS Page LISTOFTABLES iv LISTOFFIGURES v Abstract 1 UCTION 3 -HEATINGFACTORS 6 Oxidation 6 Moisture.• 8 TraceSpecies 10 GeologicalandMiningConditions 11 SFORPREDICTINGSELF-HEATING 11 RASCALSystem 12 GermanSystem 14 CanadianSystem 15 :// Brown coal and subbituminous coal are usually very prone to self-heating and must be carefully managed to avoid spontaneous combustion during storage and transportation.

The relative reactivity of coals is shown in Tablewhich compares the oxidation rates measured on a range of American coals at °C (Cliff et al., ). Class includes: Pyrophoric substances, which are substances, including mixtures and solutions (liquid or solid), which, even in small quantities, ignite within 5 minutes of coming into contact with substances are the most liable to spontaneous combustion & Self-heating substances, which are substances, other than pyrophoric substances, which, in contact with air without energy   Keywords: Low Temperature Oxidation, Oxidation of Coal, Self Heating of Coal, Spontaneous Combustion, Coal Storage, Stacking, Blending.

Contents 1. Introduction 2. Methods of Coal Stacking Windrow Method Chevron Method Cone Shell Type Method 3. Problems Faced in Coal Stacks 4. Low Temperature Oxidation of Coal and Spontaneous • Bulk powder test: Used to evaluate self-heating properties of materials in quantities not exceeding 1 ton in situations when it is heated in bulk form.

• Aerated powder test: Simulates conditions during heating operations of a material in quantities not exceeding 1 ton, during which a Abstract: Adiabatic self-heating tests had been conducted on Dafosi coal.

Analysis of the relationship of temperature and reaction rate revealed that the dependence of coal sample temperature on reaction rate can be described by a third order polynomial from 40°C up to °:// Readers are introduced to experimental techniques applied to investigate the basic molecular structure of coal and evaluate chemical properties that induce self-heating behavior, theoretical analyses to predict the extrinsic effect on low temperature oxidation of coal in experimental scale and full-size longwall panel, and preventive measures   The self-healing properties of coal tar pitch tend to bridge small deformities created by debris, stress movement, hail, and other surface punctures.

Further, coal tar pitch is highly chemically resistant, resisting exposure to a large variety of acids, bases, and solvents. These properties have led to some of the most sustainable roof systems   To further understand the development of coal self-heating, the reaction sequences and thermal properties of aliphatic hydrocarbon groups during coal self-heating were analyzed.

The structural parameters, frontier orbital characteristics, molecular orbital, and perturbation energy of aliphatic hydrocarbons and oxygen were analyzed by the quantum chemistry :// Product for determining self-heating properties of coal and shales. Product for determining self-heating properties of coal and shales.

This technology is a spontaneous combustion hazard management tool with the unique ability to determine the self-combustion propensity of both coal and coal shales.

Unlike adiabatic testing procedures which ?q=content/product-determining-self-heating. Self-heating of coal promotes spontaneous combustion during mining, transportation, storage, handling and milling processes leading to risk of fires and consequent loss of calorific value of fuel.

Adiabatic oxidation method was adopted in this investigation whereby spontaneous heating potential was measured according to total temperature rise   @article{osti_, title = {Measurements and modelling of self-heating in spoil piles from open-cut coal mines}, author = {Carras, J N and Saghafi, A and Bainbridge, N W}, abstractNote = {Open-cut coal mining produces large quantities of spoil.

Spoil consists of clays, rock, minerals and other carbonaceous materials (including thin coal seams) which have little or no economic :// The curves of the characteristic parameters of primary and secondary oxidized coal showed exponential growth.

And the oxidation process can be divided into three stages, the first stage (30 °C ∼ critical temperature), the second stage (critical temperature ∼ dry cracking temperature), and the third stage (over the dry temperature). The risk of self-heating until ignition is considered here for a unique underground rock storage of a coal-fired power plant.

The main adverse consequence of non-functioning storage is interrupted district heating that is more difficult to replace in winter than lost electricity ://. Spontaneous Combustion of Coal: Characteristics, Evaluation and Risk Assessment by Xinyang Wang English | PDF | | Pages | ISBN: | MB This book aims to understand, analyze and mitigate the harmful impacts of spontaneous coal combustion in underground mines, a thermal phenomenon that triggers fires and explosions threatening the safety of mine workers ://Book • Edited by: Processes of self-heating changed the properties and composition of the wastes, and generated fluids and melts resulting in the formation of new mineral phases.

Coal and Peat Fires: A Global Perspective, Volumes 1–4, presents a fascinating collection of research about prehistoric and historic coal and peat   determine the physiochemical and combustion properties of the material and its co-firing potential with high-ash coal.

In this study, the reactivities of macadamia nut shell, high-ash coal, and anthracite, individually and in blended proportions, were analysed thermogravimetrically in air, oxygen, and CO2 atmospheres at different heating rates.