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首页> 外文期刊>Fuel >Spontaneous combustion of carbonaceous stockpiles. Part I: the relative importance of various intrinsic coal properties and properties of the reaction system
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Spontaneous combustion of carbonaceous stockpiles. Part I: the relative importance of various intrinsic coal properties and properties of the reaction system

机译：碳质储存料的自燃。第一部分：各种内在煤性质和反应体系性质的相对重要性

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The likelihood of a coal stockpile or carbonaceous waste dump undergoing spontaneous combustion is strongly influenced by factors that relate to both the intrinsic properties of the material itself, as well as the properties of the reaction system. An understanding of these material properties is a pre-requisite for the simulation of the large-scale reaction system with the aim of preventing or containing this phenomenon. The first part of this paper investigates a range of coal properties that were considered to be the most critical in terms of heat 'generation' in a bulk coal medium. Certain properties, such as the heat capacity, the heat of reaction with oxygen and the activation energy for this reaction, were found to vary to a relatively minor degree for coals of varying rank and geological origin. However, rates of reaction with oxygen were found to vary by orders of magnitude for different coals. The reaction kinetics is consistent with a diffusion-limited shrinking-core model. A study of the coal properties that most strongly influence these rates of reaction is the subject of part two of this paper.
机译：自燃的煤堆或含碳废物堆的可能性受与材料本身的固有特性以及反应系统的特性有关的因素的强烈影响。为了防止或抑制这种现象，了解这些材料的性质是模拟大规模反应系统的先决条件。本文的第一部分研究了一系列煤炭特性，这些特性被认为是散装煤介质中热量“产生”的最关键因素。对于某些等级和地质起源的煤，发现某些性质，例如热容量，与氧气的反应热以及该反应的活化能，变化相对较小。然而，发现对于不同的煤，与氧气的反应速率变化了几个数量级。反应动力学与扩散受限的收缩核模型一致。对煤炭性能的影响最大的研究是本文第二部分的主题。

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