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| 1 | 热提质过程中褐煤的碎裂特性显示文摘研究固定床和回转窑工艺的褐煤热碎裂特性.结果表明:固定床工艺中产物碎裂程度随温度及入料粒度增加而增加.当温度为400~700℃、入料粒度为6~13mm时,总碎裂率α为20.439/6~36.94%,粉化率8为5.039/6~9.249,6;入料粒度增为20~25mm,α由25.03%增至80.639/6,8为4.35%~5.609/6.回转窑工艺中回转速率为褐煤碎裂主要因素,当温度为105~230℃、入料粒度为13~20mm、转速为5r/min时,α为66.67%~78.41%,β为10.26%~14.78%,产物碎裂、粉化程度较高;转速由3r/min增为9r/min,α由57.63%增至75.82%,8为11.05%~11.88%.通过对热提质褐煤的孔隙结构、挥发分含量及表面相貌分析,得到了褐煤热碎裂的复合生成因素:孔隙结构变化、水汽行为、挥发分析出及热加工工艺参数. | 曲洋 初茉 丁力 张慧慧 王芳 | 2014 | 中国矿业大学学报2014，43，3： | 14 |
| 2 | 回转窑提质过程宝日褐煤热碎性工艺因素分析显示文摘在千克级回转窑中研究提质过程多种工艺因素对宝日褐煤粒度分布及碎裂/粉化程度的影响.结果表明:随提质温度的升高(120~700℃),产物中保持粒级(25~13 mm)的比率由86.62%降至4.32%,碎裂粒群(13~1mm)和粉化粒群(-1mm)的比率分别由9.51%,3.87%增至80.05%,15.63%,并以13~6mm和-0.075mm粒级的变化最为显著.褐煤的碎裂及粉化还随回转速率、保温时间及入料粒度的增加而升高.运用灰色关联方法分析4种因素对碎裂程度的影响权重依次为:温度〉粒度〉转速〉时间;对粉化的影响依次为:温度〉转速〉时间〉粒度.结合分析上述因素影响热碎的内在诱因如水汽-挥发分析出、机械力、间接强化、对颗粒材料抗力及内部气阻等的影响,建立了回转窑提质过程褐煤碎裂-粉化历程描述模型. | 曲洋 初茉 申国栋 原野 张勇 畅志兵 | 2016 | 中国矿业大学学报2016，45，2： | 7 |
| 3 | Improved analytic methods for coal surface area and pore size distribution determination using 77 K nitrogen adsorption experiment显示文摘77 K nitrogen adsorption was the most widely used technique for determining surface area and pore size distribution of coal. Brunauer–Emmett–Teller(BET) and Barrett–Joyner–Halenda(BJH) model are commonly used analytic methods for adsorption/desorption isotherm. A Chinese anthracite coal is tested in this study using an improved experimental method and adsorption isotherm analyzed by three adsorption mechanisms at different relative pressure stages. The result shows that the micropore filling adsorption predominates at the relative pressure stage from 6.8E 7 to 9E 3. Theoretically, BET and BJH model are not appropriate for analyzing coal samples which contain micropores. Two new analytic procedures for coal surface area and pore size distribution calculation are developed in this work. The results show that BET model underestimates surface area, and micropores smaller than 1.751 nm account for 35.5% of the total pore volume and 74.2% of the total surface area. The investigation of surface area and pore size distribution by incorporating the influence of micropore is significant for understanding adsorption mechanism of methane and carbon dioxide in coal. | Wang Gongda Wang Kai Ren Tingxiang | 2014 | International Journal of Mining Science and Technology2014，24，3： | 6 |
| 4 | 基于分子间作用力的不同吸附模型适用性研究显示文摘针对不同吸附模型对无烟煤阶段煤样吸附的适用性问题,在SPSS18.0平台上对程庄矿无烟煤吸附试验数据进行拟合,基于分子间作用力,从微观上对比研究Langmuir-Freundlich等6个模型的适用性。研究结果表明:(1)基于分子间作用力对煤样吸附适用性的研究是可靠有效的;(2)三参数模型的拟合效果优于二参数模型;(3)无烟煤阶段采用Freundlich吸附模型拟合是不适宜的,采用D-A模型效果最好;(4)依据超临界状态饱和蒸汽压所估算的饱和吸附量偏大,表明推算饱和蒸汽压的经验公式存在缺陷;(5)针对不同吸附模型对其它煤阶煤样吸附的适用性问题应该进一步研究。研究结果可为煤层气储量分析及涌出预测提供理论依据或参考。 | 李元星 吴世跃 李长龙 张美红 | 2014 | 地下空间与工程学报2014，10，5： | 4 |
| 5 | 活性炭孔径分布对吸附CH_4性能的影响显示文摘为了分离和浓缩煤矿瓦斯中的CH_4,以太西无烟煤为原料、水蒸气为活化介质,研究了在添加剂作用下工艺条件对活性炭孔隙结构及吸附CH_4性能的影响.实验结果表明:影响CH_4吸附量的关键因素是0.6~0.8nm孔的孔容大小,无论工艺条件如何变化,只要能提高该范围的孔容积,活性炭的CH_4吸附量也随之增大.添加NH_4Cl和KNO3时,活化程度(烧失率)、炭化终温、炭化升温速率、活化温度等工艺条件对活性炭的微孔率影响不大,微孔率均在91%左右,但对微孔分布有明显影响,NH_4Cl和KNO3的添加有利于小微孔的生成,特别是有利于孔径0.6~0.8nm孔隙的形成,能有效提高活性炭CH_4吸附量的增大.活性炭的烧失率过低或过高都不利于0.6~0.8nm孔隙的形成,适宜的烧失率为30%~40%;较高的炭化升温速率不利于0.6~0.8nm之间孔容积的提高,适宜的炭化升温速率为3~5℃/min;过低或过高的炭化终温不利于0.6~0.8nm之间孔容积的提高,适宜的炭化终温为650℃;总体来说,活化温度的影响相对较小,适宜的活化温度为880℃.在最优条件下制备的活性炭CH_4吸附量达到24.31mL/g. | 张双全 卿涛 蔚德磊 侯帅 魏文轩 李孝审 张钰 | 2018 | 中国矿业大学学报2018，47，2： | 2 |
| 6 | CO_2 –H_2O–coal interaction of CO_2 storage in coal beds显示文摘In order to study the physical and chemical reaction after CO2 injected into coal beds at different condition.The physical and chemistry reaction among CO2,H2O and coal was studied,and the influence on permeability and porosity of coal beds was carried out.The experimental method was used,so did the basic theory of mineralogy,coal petrology,geochemistry,analytical geochemistry and physical chemistry.In this experiment,the changes of mineral and permeability of coal and water quality were observed through CO2 solution reacting with different coal samples.The differences could be found out by comparing the properties and microcrystalline structure before and after the reaction.There are three results were carried out:First,the content of carbonate in coal beds decreases because of the dissolution reaction between carbonate minerals and CO2 solution,and precipitation is formed by reaction of chlorite and orthoclase.Second,the result that permeability and porosity of coal beds are improved after the reaction is proposed.Third,the initial permeability of different coal samples plays a great role on the reaction,and the improvement of permeability is not obvious in the samples which have too low or too high permeability,and the improvement is good in medium permeability(0.2–3 mD). | Gao Shasha Wang Yanbin Jia Lilong Wang Hongjie Yuan Jun Wang Xianghao | 2013 | International Journal of Mining Science and Technology2013，23，4： | 2 |
| 7 | 基于红外成像技术的煤中甲烷分布特征研究显示文摘为了研究煤体在吸附过程中,甲烷的非均匀分布以及煤体温度的改变特征,通过红外热成像的方法和MATLAB程序,对不同变质程度的煤样进行观测分析。结果表明:在吸附过程中,不同煤阶的煤样截面具有不同范围的吸附明显区域,该区域温度变化大,且随着吸附压力的增大,该现象越显著;当煤样吸附达到平衡时,在任意吸附平衡压力下均存在某一温度变化临界值;在温度改变量大于该临界值的煤体截面区域范围,煤体中不同温度变化增量段的甲烷吸附量的分布比率高于煤单元数量分布比率,则定义该煤体区域为甲烷吸附聚积区;随着吸附压力的增大,煤样截面区域的温度变化范围变大,煤样吸附的非均匀性增强;随着温度变化量的增大,不同温度变化增量段的煤单元数量分布比率及其对应的甲烷吸附量分布比率呈现先增大后减小的趋势,服从正态分布。 | 王辰 冯增朝 | 2021 | 煤矿安全2021，52，6： | 1 |
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