Compositional evolution of lignite during spontaneous ...
In order to better explore the spontaneous combustion characteristics of lignite, a low-temperature heating experimental device was used to study the changes in the physical and chemical structure of lignite in an air atmosphere of 50–350°C. Through FTIR, XRD and SEM, the coal sample's chemical structure and surface microstructure change at low temperature …
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Lignite (Brown Coal) - Geology Superstore
Unfortunately its high moisture content and susceptibility to spontaneous combustion can cause problems in transportation and storage. It is used almost exclusively for the generation of electricity in countries such as Greece & China. Germanium is extracted from lignite mined in China. This example is from Miocene deposits in Germany.
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What is Lignite? (with picture) - wiseGEEK
Brown coal can be more difficult to use than other types of coal. For instance, it can be susceptible to spontaneous combustion, making transporting and storing it problematic. Due to its transportation limitations, brown coal is often burned in a utility plant that has been set up near a lignite mine.
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Lignite in Arkansas - Arkansas Geological Survey
Lignite has a high content of volatile matter which makes it more convertible into gas and liquid petroleum products than the higher ranking coals. However, its high moisture content and susceptibility to spontaneous combustion may cause problems in transportation and storage.
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Lignite - Types, Characteristics, Uses, Applications and Facts
The high moisture content of lignite creates a number of issues for its use, as it reduces the electrical efficiency of thermal power plants and can cause problems during handling, such as spontaneous combustion. Furthermore, the high moisture level affects the fuel's energy density, making long-distance transportation uneconomic.
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Experimental Study of the Volume Drying Shrinkage ...
lignite is prone to spontaneous combustion or burning. It is not suitable for long-term stacking and long-distance trans- portation and has serious safety risks.4−6The existence of water leads to coal softening. Under exposed conditions, the volume shrinkage of …
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Polyethylene as a novel low-temperature inhibitor for ...
Spontaneous Combustion Introduction Spontaneous combustion of coal causes serious accidents and economic losses for the storage and transportation of coal. Especially for the lignite coal, it is susceptible to spontaneous combustion due to its low coalification rank [1–3]. As time of exposure to air goes on, the lignite prefers to ...
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Microstructural characteristics of Shengli lignite during ...
It is important to understand low-temperature oxidation to inhibit the spontaneous combustion of lignite for its safe transportation and efficient utilization. The study investigates the effect of temperature on microstructure and mass change during low-temperature oxidation of Shengli lignite (SL) and further explores the promoting effect of ...
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Spontaneous Combustion of Coal - Practical Maintenance
Spontaneous combustion of coal is the process of self heating resulting eventually in its ... They are lignite, subbituminous, bituminous and anthracite. ... as it adds unnecessary weight during transportation, reduces the calorific value, and poses some handling problems.
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Lignite ammonia adsorption and surface chemistry after ...
The dewatering can therefore slightly reduce the risk of spontaneous combustion for lignite, which will improve the safety of transportation of lignite . As seen from HIM images in Fig. 4, the original lignite had irregular size and shape distributions while a typical structural change of lignite after modification was the removal of pore ...
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(PDF) Combustion Characteristics of 24 Lignite Samples
The risk of spontaneous combustion is also ... The purpose of this study is to relate the combustion reactivity of lignite to its physical and chemical properties. ... The transportation efforts ...
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Experimental Study of the Volume Drying Shrinkage ...
processing, utilization, storage, and transportation of lignite are increasing, and the problem of the spontaneous combustion of lignite is also becoming of increasing concern.1−3 Lignite has a large pore structure (mainly macropores and mesopores), a large surface area, rich functional groups, and a large electrostatic potential, which
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An Autopsy of Spontaneous Combustion of Lignite | …
The increasing demand of lignite in the power sector has led to a renewed interest to study the possibilities of spontaneous combustion behavior. Bulk …
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An Autopsy of Spontaneous Combustion of Lignite | Request PDF
The increasing demand of lignite in the power sector has led to a renewed interest to study the possibilities of spontaneous combustion behavior. Bulk …
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Lignite ammonia adsorption and surface chemistry after ...
Unfortunately, the high-water content of lignite leads to high transportation costs that preclude the use of this otherwise low-cost and efficient NH 3 absorbing material. Efficient dewatering of lignite is required so that its transportation from mining sites to feedlots is economically feasible.
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Lignite - Wikipedia
Lignite has a high content of volatile matter which makes it easier to convert into gas and liquid petroleum products than higher-ranking coals. Unfortunately, its high moisture content and susceptibility to spontaneous combustion can cause problems in transportation and storage.
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Microstructural characteristics of Shengli lignite during ...
As a result, a better understanding of the mechanisms governing low-temperature oxidation of lignite plays a key role in the prevention of self-heating and spontaneous combustion. In low-temperature oxidation range of temperature, self-heating and spontaneous combustion of coal occur from room temperature to ignition temperature (<300 °C).
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Thermogravimetric and infrared spectroscopic studies of ...
Therefore, the risk of spontaneous combustion of lignite is prominent. Many scholars use the crossing point temperature (CPT) method to determine the spontaneous combustion tendency of lignite.18–20 The crossing point temperature is an important temperature parameter for the spontaneous combus-tionprocessofcoal.Itde ...
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Spontaneous Combustion of Coal - Practical …
Spontaneous combustion of coal is the process of self heating resulting eventually in its ... They are lignite, subbituminous, bituminous and anthracite. ... as it adds unnecessary weight during transportation, reduces the calorific value, and poses some handling problems.
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