MnS掺杂多孔碳复合材料的制备及电化学性能（两张发票1000+2500）

褐煤作为低级煤资源利用率不高，但褐煤中具有腐植酸成分，将褐煤中提取的腐植酸作为化肥原料，提取后剩余残渣作为碳源，与MnS纳米粒子制备了MnS@C复合材料。采用XRD、拉曼光谱、XPS、N2吸附-脱附、SEM和TEM对样品进行了表征。将该复合材料应用于锂离子电池负极材料，对其电化学性能进行了测试。结果表明，MnS@C复合材料的比表面积和孔容分别为117.19m2/g和0.044mL/g，该电极在0.1 A/g电流密度条件下循环200次后比容量高达830 mA‧h/g，且电极容量保持率为99%左右。在0.2、0.4、0.8、1.0、1.2和1.6 A/g电流密度下比容量分别为644、522、427、399、373和348mAh/g，展现出良好的倍率性能。MnS@C复合材料优异的电化学性能得益于碳基体的存在，不仅可以缓解MnS纳米粒子在嵌锂/脱锂过程中的体积膨胀，而且展示了锂离子电池高性能的巨大潜力，为褐煤的高值化利用作出巨大贡献。     

Effect of ultrasound on the true flotation of lignite and its entrainment behavior

In this study, the ultrasound was fixed in the pulp zone of flotation cell and its effect on the true flotation of lignite was analyzed. Flotation results indicated that the simultaneous ultrasound treatment increased the concentrate yield and decreased the concentrate ash content. Screening analysis of flotation products revealed that the ultrasound could crush coarse coal to fine coal and scanning electron microscopy (SEM) tests indicated that the ultrasound could reduce the coverage of high-ash coal fines on the coarse particle surface. Thus, the flotation recovery of coarse lignite particle was increased. In addition, the true flotation and entrainment of ?0.074 mm fine particles were studied by the sink-float test and the method of Trahar. It was found the ultrasound significantly enhanced the true flotation of fine particles and improved the overall water recovery in lignite flotation.     

Coal and Lignite Production

Current data on coal and lignite production, as well as a breakdown of production by country. Updated on a monthly basis.     

Coal and Lignite Production

Current data on coal and lignite production, as well as a breakdown of production by country. Updated on a monthly basis.     

Hydrogen transfer during co-liquefaction of Elbistan lignite and biomass: liquid product characterization approach

In this study, Elbistan lignite (EL) and manure were liquefied under catalytic conditions in an inert atmosphere. Red mud, tetralin, and distilled water were used as a catalyst and solvent, respectively. The liquefaction studies were carried out under catalytic conditions in the catalyst concentration of 9%, solvent/solid ratio of 3/1, reaction time of 60 min, waste/lignite ratio of 1/3, and at temperature of 400°C. Stirring speed and initial nitrogen pressure were kept constant at 400 rpm and 20 bar, respectively. At the end of liquefaction process, the soluble liquefaction products were separated by successive solvent extraction to preasphaltene, asphaltene, and oils. Oil products characterized by H-NMR to be able to differ hydrogen transfer from manure to EL surface. To obtain the hydrogen transfer way, liquefaction experiments conducted under inert atmosphere which does not related to hydrogen reaction, other above experimental conditions were kept same but only solvent type changed. The reason of using distilled water instead of tetraline is tetraline known as hydrogen donor but not water. Because water behaves supercritical conditions during the liquefaction stage. EL liquefied alone while using tetraline however EL liquefied with manure with using distilled water as a solvent. The obtained oil products form both experiments characterized by H-NMR. The radical groups diffraction and range values are not changed significantly shows that manure behaved as an hydrogen donor. So, EL with manure is the one great option to reduce cost of hydrogen source for direct coal liquefaction plant.     

Coal and Lignite Production

Current data on coal and lignite production, as well as a breakdown of production by country. Updated on a monthly basis.     

Effect of pore characteristics of fine lignite on particle density in separation medium

Effect of porosity on particle density was analyzed, which can be a potential factor of low efficiency. The porosity of particle with different densities was detected by surface area analyzer. In addition, Three-dimensional X-ray micro-imaging system (3D-XRM) was used to analyze the spatial distribution of internal pores. Results show that mesoporous and microporosity content increase with the increase of particle density. Three-dimensional distribution of pores shows that the pores are very rich and show a good connection. The density model including porosity and medium density was established, which shows the effect of medium filling on the change of particle density.     

循环流化床脱硫灰用于水泥生产的研究

褐煤作燃料热电厂产生的循环流化床脱硫灰应用于我公司2 500 t/d新型干法窑生产线水泥生产，由于褐煤中全硫含量偏高且波动大，由此致使脱硫过程中脱硫剂比例变化波动也大，将熟料、矿渣、脱硫灰分别用小磨粉磨后进行试验，在试验基础上，除了对该脱硫灰超细粉磨外，同时必须要解决脱硫灰的均化和f-CaO消解问题，通过技术改造使系统设备、工艺更加适合采用脱硫灰复掺技术。     

水热处理过程中伊敏褐煤微观结构的演变规律

褐煤水热处理可以脱除有害元素,降低n(O)/n(C)比,提高煤阶,有利于煤的洁净利用。利用高压反应釜对褐煤进行水热处理,采用拉曼光谱(Raman)和傅立叶红外光谱(FTIR)对处理后的煤样的化学结构进行分析,探索了不同温度水热处理后煤样微观结构的演变规律。结果表明:150℃水热处理时部分含氧官能团脱除,同时,部分脂肪族侧链断裂及不稳定大分子芳环结构分解形成小分子芳环结构,部分CO分解形成各类醚和羟基;当水热温度升至200℃,处理后褐煤的芳香度指数(R)和芳香结构稠合指数(DOC)上升,表明煤内缩合结构增加,同时,缺陷结构和杂环被去除,大分子芳环结构相对增加,CO大量分解;水热温度继续升高至250℃,褐煤发生氢转移反应导致脂肪族侧链增加;当水热温度达到300℃时,褐煤的芳环结构被破坏,交联结构和无定形碳增加。     

鄂尔多斯褐煤超精煤的制备及其黏结性能

改变温度（300~400 ℃）和溶剂,高温萃取鄂尔多斯褐煤制备超精煤,通过红外、热重等手段分析不同工艺条件下超精煤结构的变化,考察超精煤黏结性的影响因素,并对超精煤进行常温分级萃取实验,进一步分离出超精煤的黏结组分,寻求超精煤黏结性的来源与性质。研究结果表明：通过高温萃取工艺,即使以不具有黏结能力的褐煤为原料,所得超精煤仍具有较高的黏结性。300 ℃下NMP萃取褐煤所得超精煤的黏结指数为89.6,而380 ℃下以洗油为溶剂所得超精煤的黏结指数则可达到98.2,这是由于以相对低温度和极性溶剂萃取,所得超精煤中含大量挥发性物质,易在煤热解之前分解挥发,阻碍了胶质体液相的形成,提高萃取温度和采用非极性溶剂则可以在有效减少含氧官能团等小分子组分的同时保证活性氢的含量,可以得到黏结性更高的超精煤。沥青质和前沥青质是超精煤的黏结组分,它们具有适中的分子量,含有大量脂肪和短环芳香结构,其含量决定了超精煤的黏结性。