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Research progress and prospects of coal petrology and coal quality in China 认领
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作者 Yuegang Tang Ruiqing Li Shaoqing Wang 《国际煤炭科学技术学报:英文版》 EI 2020年第2期273-287,共15页
Clean utilization of coal depends on the quality of raw coal,which depends on the coal-forming parent materials(petrology and chemical composition of coal),the multiple media of the coal-forming environment,and some e... Clean utilization of coal depends on the quality of raw coal,which depends on the coal-forming parent materials(petrology and chemical composition of coal),the multiple media of the coal-forming environment,and some epigenetic conditions,such as thermal evolution(coalification),magmatic hydrothermal fluid,groundwater.Based on the research results of predecessors and prediction studies of coal resources since the founding of China,the present status of research on coal petrology,coal quality,coal metamorphism,and coal geochemistry in China is discussed in detail,with emphasis on research progress and the general situation of highly efficient and clean utilization of coal in the technical fields of coking,pyrolysis,combustion,gasification,and liquefaction,and the development prospects of coal petrology and coal quality in China are prospected. 展开更多
关键词 Coal petrology Coal quality Coal metamorphism Coal geochemistry Research status PROSPECT
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煤灰成分对其熔融性影响探究 认领
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作者 宋宝瑞 《煤炭与化工》 CAS 2020年第4期133-135,共3页
煤灰组成与煤灰熔融性之间有十分密切关系,煤灰熔融温度高低取决于煤灰组成成分的不同。通过实验,探讨了煤灰成分的组分SiO2、Al2O3、TiO2、Fe203、CaO等对煤灰熔融温度影响,分析了煤灰组分对灰熔融温度影响大小,提出探讨煤灰成分与煤... 煤灰组成与煤灰熔融性之间有十分密切关系,煤灰熔融温度高低取决于煤灰组成成分的不同。通过实验,探讨了煤灰成分的组分SiO2、Al2O3、TiO2、Fe203、CaO等对煤灰熔融温度影响,分析了煤灰组分对灰熔融温度影响大小,提出探讨煤灰成分与煤灰熔融性关系,对煤灰成分、煤灰熔融性结果审核及评价动力用煤气化用煤具有实际意义。 展开更多
关键词 煤炭 煤灰成分 煤灰熔融性
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Numerical investigation on the caving mechanism with different standard deviations of top coal block size in LTCC 认领
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作者 Jiachen Wang Weijie Wei +2 位作者 Jinwang Zhang Brijes Mishra Ang Li 《矿业科学技术学报:英文版》 SCIE EI CSCD 2020年第5期583-591,共9页
The size distribution of the broken top coal blocks is an important factor,affecting the recovery ratio and the efficiency of drawing top coal in longwall top coal caving(LTCC)mining panel.The standard deviation of to... The size distribution of the broken top coal blocks is an important factor,affecting the recovery ratio and the efficiency of drawing top coal in longwall top coal caving(LTCC)mining panel.The standard deviation of top coal block size(dt)is one of the main parameters to reflect the size distribution of top coal.To find the effect of dt on the caving mechanism,this study simulates experiments with 9 different dt by using discrete element software PFC.The dt is divided into two stages:uniform distribution stage(UDS)whose dt is less than 0.1(Schemes 1–5),and nonuniform distribution stage(NDS)whose dt is more than 0.1(Schemes 6–9).This research mainly investigates the variation of recovery ratio,drawing body shape,boundary of top coal,and contact force between particles in the two stages,respectively.The results showed that with the increasing dt,the recovery ratio of the panel increases first and then decreases in UDS.It is the largest in Scheme 3,which mainly increases the drawing volume at the side of starting drawing end.However,the recovery ratio decreases first and then increases quickly in NDS,and it is the largest in Scheme 9,where the drawing volume at the side of finishing drawing end are relatively higher.In UDS,the major size of top coal is basically medium,while in NDS,the size varies from medium to small,and then to large,with a distinct difference in shape and volume of the drawing body.When the major size of top coal is medium and small,the cross-section width of the initial boundary of top coal at each height is relatively small.Conversely,when the top coal size is large,the initial boundary of top coal has a larger opening range,the rotating angle of lower boundary is relatively small in the normal drawing stage,which is conducive to the development of drawing body and reduces the residual top coal,and the maximum particle velocity and the particles movement angle are both larger.This study lays a foundation for the prediction of recovery ratio,and suggests that the uniform top coal is more mana 展开更多
关键词 Longwall top coal caving mining Standard deviation of top coal size Recovery ratio Drawing body Boundary of top coal Contact force
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Decomposition of carbon dioxide hydrate in the samples of natural coal with different degrees of metamorphism 认领
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作者 Vyacheslav G. Smirnov Valeriy V. Dyrdin +1 位作者 Andrey Yu. Manakov Zinfer R. Ismagilov 《中国化学工程学报:英文版》 SCIE EI CAS CSCD 2020年第2期492-501,共10页
Methane and carbon dioxide hydrates are one of the possible forms in which these gases exist in natural coal(for more detailed discussion see Refs [1,2]). In this work, the decomposition of carbon dioxide hydrate in f... Methane and carbon dioxide hydrates are one of the possible forms in which these gases exist in natural coal(for more detailed discussion see Refs [1,2]). In this work, the decomposition of carbon dioxide hydrate in five samples of natural coal differing from each other in metamorphism degree was investigated experimentally. Carbon dioxide hydrate dispersed in coals was synthesized from water adsorbed in these coals. During a linear temperature rise in an autoclave with the coal + hydrate sample the hydrate decomposition manifests itself as a step of increase in gas pressure, accompanied by a decrease/stabilization of the temperature of coal sample. The dependencies of the amount of hydrate formed on initial coal humidity and on gas pressure during hydrate formation were studied. It was demonstrated that each coal sample is characterized by its own humidity threshold below which hydrate formation in natural coal is impossible. With an increase in gas pressure, the amount of water transformed into hydrate increases. For the studied coal samples, the decomposition of carbon dioxide hydrates proceeds within a definite temperature and pressure range, and this range is close to the curve of phase equilibrium for bulk hydrate. 展开更多
关键词 GAS HYDRATE Carbon dioxide COAL COAL RANK Phase transformation COAL bed GAS
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Gas Drainage Technology in Fully Mechanized Caving Face with Horizontal Sublevel Mining in Steep and Extra-Thick Coal Seam 认领
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作者 Bingxing Sun 《地质学期刊(英文)》 2020年第9期957-970,共14页
This paper analyzes the gas source of the horizontally sectioned fully mechanized caving face in the steeply inclined and extra-thick seam of Adaohai Coal Mine, and numerically simulates the stress distribution and pr... This paper analyzes the gas source of the horizontally sectioned fully mechanized caving face in the steeply inclined and extra-thick seam of Adaohai Coal Mine, and numerically simulates the stress distribution and pressure relief of the lower section coal after the upper section working face is mined. It theoretically analyzed the reasonable layout of the drainage boreholes, and designed the drainage borehole layout accordingly. In the upper and lower section of the working face, the actual drainage effect of the boreholes was inspected, and the air exhaust gas volume in the working face was statistically analyzed. It was confirmed that the layout of boreholes was reasonable, the gas control effect of working face was greatly improved and fully met the needs of safe mining. The control effect was greatly improved and the need for safe mining was fully met, and thus a gas drainage technology suitable for the coal seam storage conditions and mining technology of the Adaohai Coal Mine was found. That is to say: the gas emission from the working face of the section mining mainly comes from its lower coal body. Pre-draining the lower coal body of the section and depressurizing gas interception and drainage are the key to effectively solve the problem of gas emission from the working face. Drainage boreholes in the working face of the section should be arranged at high and low positions. The high-level boreholes are located about 2 m from the top of the working face, and the high-level boreholes are about 9 m away from the top of the working face. Through the pre drainage of high and low-level boreholes in advance and the interception and pressure relief drainage, the gas control in the horizontal sublevel fully mechanized caving mining face in steep and extra thick coal seam can realize a virtuous cycle. 展开更多
关键词 Steeply Inclined Extra Thick Seam Horizontal Segmentation Top Coal Caving The Source of the Gas Pressure Relief Gas Drainage
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基于水力割缝的高瓦斯煤层掘进工作面强化增渗技术与实践 认领
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作者 程波 樊正兴 何显能 《中国矿业》 北大核心 2020年第6期121-126,共6页
以山西省潞安一缘煤业150112试验工作面运输巷的掘进为工程背景,基于GF-100型超高压水力割缝设备,分析了煤巷掘进工作面高压水力割缝强化瓦斯抽采的技术原理。将高压水力割缝工艺与高瓦斯矿井煤巷的安全、快速掘进有机结合,提高了掘进... 以山西省潞安一缘煤业150112试验工作面运输巷的掘进为工程背景,基于GF-100型超高压水力割缝设备,分析了煤巷掘进工作面高压水力割缝强化瓦斯抽采的技术原理。将高压水力割缝工艺与高瓦斯矿井煤巷的安全、快速掘进有机结合,提高了掘进工作面煤体的渗透特性,增强了瓦斯抽采效果,形成了基于水力割缝的高瓦斯煤层掘进工作面强化增渗技术工艺体系,并在试验工作面煤巷掘进中进行了应用。结果表明:①将高压水力割缝工艺应用于高瓦斯矿井煤巷的掘进作业,解决了使用常规方法施工措施钻孔工程量大、抽采周期长的问题;②在采用水力割缝作业期间,瓦斯抽采量提高了2.36~2.4倍,平均日进尺提升了近2.5倍。 展开更多
关键词 瓦斯 水力割缝 煤巷掘进
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Application of Fly Ash and Organic Material as Dry Cover System in Prevention of Acid Mine Drainage Generation 认领
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作者 Thant Swe Win Sendy Dwiki +4 位作者 Akihiro Hamanaka Takashi Sasaoka Hideki Shimada Shinji Mastumoto Ginting Jalu Kusuma 《地球科学和环境保护期刊(英文)》 2020年第5期56-64,共9页
The common practice in AMD prevention is a dry cover technique. In this technique, rock that is potential in producing acidity (PAF) will be placed below non-acid producing rock (NAF). Depends on NAF availability in t... The common practice in AMD prevention is a dry cover technique. In this technique, rock that is potential in producing acidity (PAF) will be placed below non-acid producing rock (NAF). Depends on NAF availability in the mine site situation, organic covers can be used to prevent diffusion of oxygen into reactive sulphide wastes and subsequently to eliminate sulphide compounds oxidation and generation of acidic waters. The utilization of additional material cover layer is proposed, by using fly ash and organic material combination. To investigate the possibility of using these materials, a column leaching test in the laboratory scale was conducted with several scenarios of simulation. By comparing between column with different thickness of fly ash and organic material, the leachate water behavior is observed in the experiment, including the measurement of water quality (pH and EC), major cations-anions. The result suggests the possible thickness of fly ash (FA) and organic material (OM) as cover layer material, especially in the case of mine with domination of PAF rock material. 展开更多
关键词 AMD FLY Ash Organic Material DRY COVER Coal Mine Column LEACHING
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Radiological Impact Assessment of Mining on Soil, Water and Plant Samples from Okobo Coal Field, Nigeria 认领
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作者 A. U. Itodo P. O. Edimeh +1 位作者 I. S. Eneji R. A. Wuana 《地球科学和环境保护期刊(英文)》 2020年第5期65-81,共17页
Anthropogenic, including mining activities leaves the environment contaminated with potentially toxic substances and remote hazards if not properly checked. The quest in this study is the levels of naturally occurring... Anthropogenic, including mining activities leaves the environment contaminated with potentially toxic substances and remote hazards if not properly checked. The quest in this study is the levels of naturally occurring radionuclides in Okobo coal, Nigeria and their possible distribution in coal mine vicinity soils, water and plants (cassava). Samples were characterized for levels of radionuclides and radiological detriments using high resolution gamma spectrometer, Gamma ray liquid scintillation and applicable radiological hazard indices. The range of mean activity concentrations (Bq·kg-1) for the environmental samples are as follows: 226Ra (8.39 ± 1.0 to 77.6 ± 4.0), 232Th (0.470 ± 0.4 and 77.8 ± 2), and 40K (29.1 ± 0.4 and 289 ± 6), with their respective mean values of 32.7 ± 2.1, 54.0 ± 1.5 and 158.8 ± 3.1 (Bq·kg-1). Radiological detriments including radium equivalent activity (Raeq), external hazard index (Hex), internal hazard index (Hin), radioactivity level index or gamma index (Iγ) and the ELCR for coal sample is 96.94 Bq·kg-1, 0.26, 0.30, 0.69, and 1.56 respectively. Reported values were below the safety limits stipulated by UNSCEAR and implied that the environment is relatively safe with low levels of natural radioactivity. Overall, this background study has demonstrated that Okobo coal mine is a less radio-hazard contributor to environmental samples. Exceptions to this generalization are representative gamma index (Iγr) and annual effective dose equivalent values for some cassava and soil samples, which may call for future impact monitoring. 展开更多
关键词 Coal RADIOLOGICAL Detriments HAZARD Okobo Activity CONCENTRATIONS GAMMA-RAY SPECTROMETRY
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我国洁净煤技术2035发展趋势与战略对策研究 认领
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作者 孙旭东 张博 彭苏萍 《中国工程科学》 CSCD 北大核心 2020年第3期132-140,共9页
煤炭在我国能源结构中长期保持基础性地位。实现煤炭资源的清洁高效利用,亟待大力发展洁净煤技术。本文在界定洁净煤技术概念的基础上,辨识了洁净煤技术的先进性特征,预判了面向2035的关键前沿技术,结合国内外主要前沿技术的发展现状,... 煤炭在我国能源结构中长期保持基础性地位。实现煤炭资源的清洁高效利用,亟待大力发展洁净煤技术。本文在界定洁净煤技术概念的基础上,辨识了洁净煤技术的先进性特征,预判了面向2035的关键前沿技术,结合国内外主要前沿技术的发展现状,明确了我国洁净煤技术发展战略目标与路径,据此提出了相应的政策建议。研究发现,我国在700℃超超临界、整体煤气化联合循环/整体煤气化燃料电池联合循环(IGCC/IGFC)等先进发电技术及煤炭深加工产业的技术研发、装备制造和工程示范等方面具有一定的国际竞争力,但在自主创新能力、体制机制、区域或企业间平衡发展等方面仍存在诸多问题,应当着眼于煤炭能源长远发展,前瞻规划面向2035的洁净煤技术与产业发展方向,积极部署先进技术研发与工程示范,全面提升我国洁净煤技术发展水平,有效改善煤炭清洁高效利用的产业发展环境。 展开更多
关键词 煤炭 洁净煤技术 能源战略 2035
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A review on co-pyrolysis of coal and oil shale to produce coke 认领
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作者 Xiangchun Liu Ping Cui +2 位作者 Qiang Ling Zhigang Zhao Ruilun Xie 《化学科学与工程前沿:英文版》 SCIE EI CAS CSCD 2020年第4期504-512,共9页
It has become the top priority for coking industry to rationally use and enlarge coking coal resources because of the shortage of the resources.This review focuses on the potential utilization of oil shale(OS)as a fee... It has become the top priority for coking industry to rationally use and enlarge coking coal resources because of the shortage of the resources.This review focuses on the potential utilization of oil shale(OS)as a feedstock for coal-blending coking,in which the initial and basic step is pyrolysis.However,OS has a high ash content.If such OS is directly used for coal-blending coking,the coke product will not meet market demand.Therefore,this review firstly summarizes separation and beneficiation techniques for organic matter in OS,and provides an overview on coal and OS pyrolysis through several viewpoints(e.g.,pyrolysis process,phenomena,and products).Then the exploratory studies on co-pyrolysis of coal with OS,including co-pyrolysis phenom-ena and process mechanism,are discussed.Finally,co-pyrolysis of different ranks of coals with OS in terms of coal-blending coking,where further research deserves to be performed,is suggested. 展开更多
关键词 COAL oil shale CO-PYROLYSIS coal blending coking COKE
Organic Geochemical and Petrographic Characteristics of the Coal Measure Source Rocks of Pinghu Formation in the Xihu Sag of the East China Sea Shelf Basin: Implications for Coal Measure Gas Potential 认领
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作者 WANG Yang QIN Yong +3 位作者 YANG Liu LIU Shimin Derek ELSWORTH ZHANG Rui 《地质学报:英文版》 SCIE CAS CSCD 2020年第2期364-375,共12页
Coal measure source rocks, located in the Xihu Sag of the East China Sea Shelf Basin, were analyzed to define the hydrocarbon generation potential, organic geochemistry/petrology characteristics, and coal preservation... Coal measure source rocks, located in the Xihu Sag of the East China Sea Shelf Basin, were analyzed to define the hydrocarbon generation potential, organic geochemistry/petrology characteristics, and coal preservation conditions. The Pinghu source rocks in the Xihu Sag are mainly gas-prone accompany with condensate oil generation. The coals and shales of the Pinghu Formation are classified from "fair" to "excellent" source rocks with total organic carbon(TOC) contents ranging from 25.2% to 77.2% and 1.29% to 20.9%, respectively. The coals are richer in TOC and S1+S2 than the shales, indicating that the coals have more generation potential per unit mass. Moreover, the kerogen type of the organic matter consists of types Ⅱ-Ⅲ and Ⅲ, which the maturity Ro ranges from 0.59% to 0.83%. Petrographically, the coals and shales are dominated by vitrinite macerals(69.1%–96.8%) with minor proportions of liptinite(2.5%–17.55%) and inertinite(0.2%–6.2%). The correlation between maceral composition and S1+S2 indicates that the main contributor to the generation potential is vitrinite. Therefore, the coals and shales of the Pinghu Formation has good hydrocarbon generation potential, which provided a good foundation for coal measure gas accumulation. Furthermore, coal facies models indicates that the Pinghu coal was deposited in limno-telmatic environment under high water levels, with low tree density(mainly herbaceous) and with low-moderate nutrient supply. Fluctuating water levels and intermittent flooding during the deposition of peat resulted in the inter-layering of coal, shale and sandstone, which potentially providing favorable preservation conditions for coal measure gas. 展开更多
关键词 hydrocarbon generation POTENTIAL COAL facies COAL MEASURE GAS Pinghu Formation Xihu SAG
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煤中伴生稀有元素及其分布、迁移的几个规律 认领
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作者 杨建业 张卫国 邹建华 《稀有金属》 EI CAS CSCD 北大核心 2020年第4期440-448,共9页
本文研究了煤中元素,特别是微量稀有元素,在不同的化学分异和机械分异过程中,遵循着一些基本的迁移分配规律。得到,即便是人工作用,任何可量化的地球化学过程或者是其他化学过程,均符合元素周期性变化规律,并在本文中首次实现了定量化... 本文研究了煤中元素,特别是微量稀有元素,在不同的化学分异和机械分异过程中,遵循着一些基本的迁移分配规律。得到,即便是人工作用,任何可量化的地球化学过程或者是其他化学过程,均符合元素周期性变化规律,并在本文中首次实现了定量化描述。而人工的机械分异过程,元素在不同粒级的飞灰颗粒之间,其分配规律除了可用元素周期性变化规律描述外,还可用自回归函数得到的经验公式进行定量描述。但在实验空间密闭的条件下,元素到煤灰中浓集作用,则不符合元素周期性变化规律,呈现出所有元素均以同比例同倍数的迁移方式,富集到高温灰化后的煤灰中。从而得出了煤在不同利用过程中,煤及其燃烧的副产物中稀有金属元素和其他微量元素的几种常见的分布规律。 展开更多
关键词 元素的地球化学行为 元素周期律 自回归函数 煤灰
Construction of Green Theoretical Framework of Coal Resource Capitalization 认领
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作者 Xueyi Zhu Liangfeng Zhu 《清洁煤炭能国际期刊(英文)》 2020年第2期15-25,共11页
In recent years, the Chinese government has asked enterprises to follow the path of “green development”. This requirement naturally becomes the guiding ideology of coal resource capitalization theory. this paper foc... In recent years, the Chinese government has asked enterprises to follow the path of “green development”. This requirement naturally becomes the guiding ideology of coal resource capitalization theory. this paper focuses on the core contents of the green development of coal resource capitalization, and uses the software of ROSTCM6 and UCINET to construct six frameworks of the green theory of coal resource capitalization with the method of “Condensed Subgroup”: the basic theory of capitalization, the conservation theory of capitalization, the environmental protection theory of capitalization, the harmonious coexistence theory of capitalization, the mainline development theory of ecological industry of capitalization Industrial theory, benign cycle sustainable development theory of capitalization, the paper further designs the outline content of the framework. 展开更多
关键词 Condensed SUBGROUP Method COAL RESOURCES CAPITALIZATION ECOLOGICAL CIVILIZATION Green Theory
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煤炭生态地质勘查基本构架与科学问题 认领 被引量:7
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作者 王佟 孙杰 +4 位作者 江涛 林中月 张博 赵欣 谢志清 《煤炭学报》 EI CAS CSCD 北大核心 2020年第1期276-284,共9页
基于煤盆地矿产资源与生态环境地质特征,以实现煤盆地多资源协同勘查开发与资源开发中生态环境和谐为目标,提出了煤炭生态地质勘查的理念与基本构架。煤炭生态地质勘查是指以煤炭地质基础理论和生态学理论为指导,针对煤盆地呈固、液、... 基于煤盆地矿产资源与生态环境地质特征,以实现煤盆地多资源协同勘查开发与资源开发中生态环境和谐为目标,提出了煤炭生态地质勘查的理念与基本构架。煤炭生态地质勘查是指以煤炭地质基础理论和生态学理论为指导,针对煤盆地呈固、液、气、元素“四态”赋存的矿产资源、地表及地下空间关键层位、生态环境与其他自然资源,采用空、天、地一体化的多种勘查技术,涵盖资源勘查、开发地质保障、资源开发与环境保护、资源综合利用、生态修复与生态系统重构并贯穿于煤炭资源勘查开发到矿山闭坑全过程的相关地质与生态勘查工作。煤炭生态地质勘查是今后煤炭地质勘查工作的重要发展方向,核心理念是生态保护优先。基于煤炭生态地质勘查理念,以煤系矿产资源和水资源、地质关键层以及生态环境保护、监测、修复相关的主要地理要素、地质信息为对象,建立了煤炭生态地质勘查基本架构,分析了煤炭地质勘查工作向资源保障和环境保护与生态建设相结合的生态地质勘查方向转变的紧迫性。研究认为:煤炭生态地质勘查要统筹好资源保障与生态环境的关系,超前规划布局,优选遥感、快速精准钻探、高精度地球物理勘探等绿色勘查技术“空天地一体化”协同应用。根据煤盆地资源赋存特征选用煤与多种矿产资源的双目标、三目标、四目标、多目标协同勘查模式,同时在资源勘查、资源开采、采后修复全过程中注重地质关键层和生态环境信息的变化,实施环境保护与生态修复措施,并通过地质大数据分析技术,集成多维数据展示勘查成果,实现对煤系多种矿产资源、生态环境地质信息、开发地质条件的透明化、数字化。 展开更多
关键词 煤炭 煤系矿产 生态地质勘查 基本架构 勘查技术
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煤矿开采对自然保护区生态环境的影响 认领
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作者 MU Pengfei 《南水北调与水利科技(中英文)》 CAS 北大核心 2020年第4期111-120,148,共11页
With the gradual attention of the state to the protection of natural ecological environment,the planning and layout of the nature reserve will overlap with some coal mine areas.In order to strengthen the construction ... With the gradual attention of the state to the protection of natural ecological environment,the planning and layout of the nature reserve will overlap with some coal mine areas.In order to strengthen the construction of ecological civilization,it is necessary to study the impact of mining on the ecological environment of the nature reserve.Through the methods of GIS and RS,and evaluation of ecological protection index system,the differences and impacts of ecological environment changes before and after the planning of the nature reserve are analyzed.The results show that since 2002,the effect of water collection and artificial soil and water conservation measures on improving the ecological environment of vegetation are obvious,the dominant species of vegetation type in the overlapping area of coal mine and nature reserve have changed from grass vegetation to shrub vegetation,in which the area of arbor forest land has increased significantly,the vegetation coverage in the overlapping area has also increased considerably.The intensity of soil erosion has decreased year by year after mining the coal resources.Post-harvest hydraulic erosion intensity is mainly below mild,and the area of artificial soil and water conservation has increased significantly.The negative impact of the ground subsidence caused by coal mining on the ecological environment is less than the positive effect brought by artificial soil and water conservation measures,and it is generally developing in a more stable direction.The ecological protection status index increased from 32.98 to 45.94,and the change degree of ecological protection status in nature reserves is 12.9≥10.The ecological protection status of the nature reserve improved significantly.On the basis of ecological environment protection and restoration measures in the nature reserve,coal mines need to further study the comprehensive impact of human activities on the ecological environment of the nature reserve. 展开更多
关键词 coal mining nature reserve ecological environment soil-water conservation VEGETATION
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提升气化炉原料煤灰熔点的研究 认领 被引量:1
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作者 景登才 《化工管理》 2020年第4期132-133,159共3页
针对气化煤灰熔点较低煤活性差,炉体内壁挂渣效果较差,煤炭燃烧不充分,渣含碳量较高等问题,文章对气化用煤煤质进行了分析,并决定选用酸性氧化物SiO2和Al2O3含量较高、灰熔点均较高(FT>1500℃)的三矿和五矿煤矸石作为阻熔剂,按照一... 针对气化煤灰熔点较低煤活性差,炉体内壁挂渣效果较差,煤炭燃烧不充分,渣含碳量较高等问题,文章对气化用煤煤质进行了分析,并决定选用酸性氧化物SiO2和Al2O3含量较高、灰熔点均较高(FT>1500℃)的三矿和五矿煤矸石作为阻熔剂,按照一定比例与气化用煤混合,提高进气化炉煤粉的灰熔点。在反复试验过程中,采取95:5的配比方案后得到上述试验结果,可将巴彦高勒末原煤的灰熔点由1180℃提高至1270℃,增幅为90℃,满足了世林化工航天煤粉加压气化炉的运行需要。 展开更多
关键词 灰熔点 煤炭 煤质分析 提升
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煤吸附常数的影响因素分析 认领
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作者 赵立鹏 高为 周培明 《四川化工》 CAS 2020年第2期42-45,共4页
通过对烟煤和无烟煤各煤级173个煤样的平衡水分、灰分、挥发分产率、显微组分、镜质体反射率和吸附常数的综合研究,探讨了煤吸附常数的影响因素,揭示了不同影响因素条件下等温吸附常数的变化规律。结果显示:煤变质程度相近时,平衡水分... 通过对烟煤和无烟煤各煤级173个煤样的平衡水分、灰分、挥发分产率、显微组分、镜质体反射率和吸附常数的综合研究,探讨了煤吸附常数的影响因素,揭示了不同影响因素条件下等温吸附常数的变化规律。结果显示:煤变质程度相近时,平衡水分含量增加,灰分(干基)含量增加,温度升高,吸附常数a有线性下降的趋势。a值与烟煤和无烟煤的镜质组含量及镜质组反射率呈一定的正相关趋势,与挥发分产率呈一定的负相关趋势。b值与烟煤和无烟煤的镜质组反射率呈一定的负相关趋势。各煤级吸附常数a平均值呈较好一次正相关线性关系,吸附常数b平均值呈较好的二次负相关线性关系。 展开更多
关键词 等温吸附 煤级 镜质体反射率
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Towards an Ethical and Ecological Approach to Electricity Generation: A Comparative Analysis of Coal and Nuclear Power in the USA 认领
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作者 Joseph R. Laracy 《生态学期刊(英文)》 2020年第6期370-379,共10页
According to the US Energy Information Administration, about 4118 billion kilowatt-hours (kWh) electricity was generated at large-scale generation facilities in 2019. About 63% of this was from fossil fuels, e.g., coa... According to the US Energy Information Administration, about 4118 billion kilowatt-hours (kWh) electricity was generated at large-scale generation facilities in 2019. About 63% of this was from fossil fuels, e.g., coal, natural gas, petroleum, and other gases. Environmental exposure to particulates, sulfur dioxide, nitrogen oxides, mercury, arsenic, radioactive fly ash, and other pollutants are extremely detrimental to the human cardiovascular, respiratory, and nervous systems. Such exposure increases the risk of lung cancer, stroke, heart disease, chronic respiratory diseases, respiratory infections, and other illnesses. In light of the challenges associated with renewables providing large quantities of base load power, as well as other factors, the benefits offered by nuclear power should be reexamined by policy makers to move the country towards a more ecological and ethical method of electric power production. This paper offers a concise analysis of many of the salient issues, comparing electricity generation from coal plants and light water nuclear reactors. 展开更多
关键词 Nuclear Energy COAL Electric Power Generation ECOLOGY Safety Health
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煤及其热解过程中微观结构的光谱学研究进展 认领
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作者 李金泽 王杰平 孙章 《燃料与化工》 2020年第2期8-13,共6页
介绍了利用现代仪器光谱学技术对煤微观结构研究的方法,综述了利用X射线衍射(XRD)、红外光谱(FTIR)、拉曼光谱(Raman)等现代仪器光谱技术在煤微观结构的分析、煤的热解过程及其热解后产物的微观结构分析的研究现状,分析了煤微观结构的... 介绍了利用现代仪器光谱学技术对煤微观结构研究的方法,综述了利用X射线衍射(XRD)、红外光谱(FTIR)、拉曼光谱(Raman)等现代仪器光谱技术在煤微观结构的分析、煤的热解过程及其热解后产物的微观结构分析的研究现状,分析了煤微观结构的变化对煤的性质及其热解过程中性质变化的影响,展望了现代分析仪器在煤化工领域的应用前景。 展开更多
关键词 煤热解过程 微观结构 XRD 红外光谱 拉曼光谱
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Investigation of thermochemical process of coal particle packed bed reactions for the development of UCG 认领
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作者 Tata Sutardi Linwei Wang +1 位作者 Nader Karimi Manosh C.Paul 《国际煤炭科学技术学报:英文版》 EI 2020年第3期476-492,共17页
In this study,a packed bed reactor was developed to investigate the gasification process of coal particles.The effects of coal particle size and heater temperature of reactor were examined to identify the thermochemic... In this study,a packed bed reactor was developed to investigate the gasification process of coal particles.The effects of coal particle size and heater temperature of reactor were examined to identify the thermochemical processes through the packed bed.Three different coal samples with varying size,named as A,B,and C,are used,and the experimental results show that the packed bed with smaller coal size has higher temperature,reaching 624°C,582°C,and 569°C for coal A,B,and C,respectively.In the case of CO formation,the smaller particle size has greater products in the unit of mole fraction over the area of generation.However,the variation in the porosity of the packed bed due to different coal particle sizes affects the reactions through the oxygen access.Consequently,the CO formation is least from the coal packed bed formed by the smallest particle size A.A second test with the temperature variations shows that the higher heater temperature promotes the chemical reactions,resulting in the increased gas products.The findings indicate the important role of coal seam porosity in underground coal gasification application,as well as temperature to promote the syngas productions. 展开更多
关键词 Thermochemical process Particle packed bed Coal particle gasification Gas products Underground coal gasification(UCG)
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