Examining the Impact of Coal Contamination on Soil …
Correlation analysis reveals that changes in CTN, Nthroat, and Lthroat significantly influence moisture parameter variations, with most pore parameter changes affecting saturated hydraulic conductivity. ... The results showed that the coal-derived carbon content (the amount of coal-derived carbon per unit mass of dried soil) was 7% (7% …
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The occurrence state of moisture in coal and its influence …
Moisture is one of the most important factors that influences coal seepage and coal-bed methane (CBM) extraction. To obtain the water occurrence state and dynamic processes of water change in coal, a series of microscopic observation experiments of Wei Jiagou coal by using field-emission environmental scanning-electron microscopy (ESEM) was …
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Influence of inherent moisture on the ignition and …
The influence of the moisture content on the ignition and combustion characteristics of lignite single particles was studied using an ignition model of single coal particles with moisture and ... The influences of inherent moisture in Collie coal during pyrolysis has been studied using a series of Collie coal samples, including the raw coal, ...
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Influence of Moisture Content of the Reactivity of Coal in …
Abstract Ozone is employed to accelerate oxidation and hence shorten experiments regarding the susceptibility of coal to oxidation and self-ignition. To avoid profound oxidative destruction of the coal sample, experiments are conducted at 25°C and low ozone concentrations (~10 mg/L). The influence of the sample's moisture content …
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Effect of coal moisture content on gas desorption and …
Theoretically, the diffusion coefficients of both models are inversely proportional to the coal moisture content, possibly because water molecules may occupy the adsorption sites of gas molecules and hinder the diffusion channel. ... High-pressure CH 4 and CO 2 sorption isotherms as a function of coal maturity and the influence of …
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Experimental Study on the Effect of Moisture Content on Bituminous Coal
Bituminous coal in the Xutuan Coal Mine of the Huaibei Mining Bureau (China) is the research object of this study. The influence of moisture content on the porosity of the bituminous coal was investigated from a microscopic perspective by using a high-solution 3D X-ray micro-analyzer. The threshold segmentation method was used to …
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Influence of dextrin content and sintering temperature on …
Influence of dextrin content and sintering temperature on the properties of coal fly ash-based tubular ceramic membrane for flue gas moisture recovery. ... In this paper, coal fly ash-based tubular ceramic membrane for flue gas moisture is prepared using coal fly ash (> 80 wt.%) as raw material, adding dextrin and other additives by …
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Influence of Volatile Content on the Explosion Characteristics of Coal
During this process, the oxygen content decreased from 21.04% of the raw coal to 3.14%, the hydrogen content decreased from 4.52% of the raw coal to 1.19%, and the carbon content increased from 71.97 to 93.68%.
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Influence of Moisture Content on Creep
The saturated moisture content of a coal specimen ω is about 10.02%. According to the preparation scheme of coal specimen moisture content and the corresponding time nodes of different moisture content, the water-bearing coal specimens with a moisture content of 2.5%, 5%, 7.5%, and saturated are prepared successively.
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Study of gas adsorption characteristics influenced by moisture content
That is, the gas pressure drop in coal reservoirs with 11.6% moisture content is 1.95 times that in coal reservoirs with 1.09% moisture content, and 2.44 times that in coal reservoirs with 0.54% ...
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Effect of coal moisture content on gas desorption and …
Moisture in coal plays a critical role in influencing gas desorption. This work numerically establishes a mathematical model for the gas desorption in spherical coal …
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Influence of the moisture content of coal batch on coke …
The strength of coke is greatly affected by the elevated and variable moisture content of the coal batch. The moisture content of the batch supplied to coal-preparation shops at coke plants must be no more than 6–7%. Otherwise, the plant must take measures to dry the coal.
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Insights into moisture content in coals of different ranks by …
The results reveal that the moisture content of low-rank coal is mainly controlled by the content of oxygen elements, followed by the specific surface area …
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The influence of moisture content on coal deformation and …
The moisture content adsorbed on the coal matrix influences the gas storage and gas flow characteristics in wet coal reservoirs. This study shows that the capacity of …
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Experimental investigation on the influences of the moisture content …
The influences of moisture content on coal dust explosion behavior had been studied by testing the maximum explosion pressure, the maximum rate of pressure rise and the explosive limit ...
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The influence of moisture content on coal deformation and coal …
The influence of moisture content on coal deformation and coal permeability during coalbed methane (CBM) production in wet reservoirs April 2020 Journal of Petroleum Exploration and Production ...
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Investigation of the influence of moisture during coal self …
Due to the high moisture in the mine, the moisture content of the fresh coal sample (Marked as Coal C: M = 9.4%) is close to the critical moisture value. The fresh coal sample was dried at 105 °C under nitrogen to obtain coal samples A and B, with a moisture content of 2.8 % and 6.6% (Marked as Coal A: M = 2.8%, Coal B: M = …
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Influence of moisture content and temperature on …
The equilibrated moisture content of the coal is difficult to predict in advance and even a 15% RH atmosphere may result in a zero moisture coal. ... The influence of moisture on adsorbed gas content is marked, with low moisture content resulting in elevated gas adsorption at all pressures. A power series relationship is observed at each ...
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Chemistry and geology of coal: nature, composition, coking
The pressure may affect the porosity and moisture content of the coal [16, 29]. ... Blander M, Sinha S, Pelton A, Eriksson G (1989) Calculations of the influence of additives on coal combustion deposits. Am Chem Soc Div Fuel Chem 34:340–346 (Preprints of papers)
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Influence of moisture on crack propagation in coal and its …
The influence of the moisture content on the ignition and combustion characteristics of lignite single particles was studied using an ignition model of single coal particles with moisture and ...
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Experimental investigations on the roles of moisture in coal …
To investigate the influences of moisture content on explosion sensitivity, the MEC data of coal dusts with different moisture content were presented in Fig. 7. As expected, the MEC enhances gradually with the rising moisture content, but has different variation trends for fine (No. 1 and No. 2) and coarse (No. 3) dusts.
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Moisture in coal
Understanding that the moisture generated in a particular determination is sensitive to changes in temperature and time, highlights the importance of having strong controls on …
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The occurrence state of moisture in coal and its …
Moisture is one of the most important factors that influences coal seepage and coal-bed methane (CBM) extraction. To obtain the water occurrence state and dynamic processes of water change in coal, a …
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Minerals | Free Full-Text | Coal Moisture …
Moisture content is a key index of coal quality that influences both the physical and chemical characteristics of coal, and it is required for determining the calorific value and handling properties of …
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Effect of moisture content on methane adsorption- and …
Intermolecular forces that act between moisture and the atoms of the coal structure have a significant influence on methane adsorption- and desorption-induced …
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Study of gas adsorption characteristics influenced by moisture content
The fitted first-order adsorption rate constant k 1, the improved formula adsorption rate constant k 2, and the second-order adsorption rate constant k 3 all decreased with an increase of moisture content in the coal samples, where k 3 is higher than k 2 which in turn is higher than k 1. The results are shown in Table 5. A is the …
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Experimental study on the effect of inherent moisture on hard coal …
On the other hand, the moisture content of coal samples obtained from the water injection method over a long time could reach 10–30% or higher ... Krooss, B.M.: High-pressure CH 4 and CO 2 sorption isotherms as a function of coal maturity and the influence of moisture. Int. J. Coal Geol. 118, 45–57 (2013) Article CAS Google Scholar ...
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Experimental Study on the Influence of Moisture Content …
There are many components in coal, among which water is the intrinsic component. Consequently, it is necessary to investigate the influence of coal moisture content on the mechanical properties of coal. Many scientists have studied the key factor of moisture content [12 – 15]. Yang et al. studied the influence of moisture …
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(388e) Experimental Investigation On the Influence of the Moisture …
The influences of moisture content on the ignition and explosion processes of coal dust had been studied by testing the lower heat value, explosion severity and explosive limit. Inhibition phenomena of moisture have been confirmed for various dust concentrations and particle size distribution.
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Chemistry and geology of coal: nature, composition, coking
For economic reasons, it is important to know the moisture and ash content of coal as they do not contribute to the heating value of coal. The calorific value mainly …
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