煤阶

不同煤阶煤表面改性的FTIR谱研究

Study on Surface Modification of Different Rank Coals by Using FTIR

煤阶的升高使焦产率上升，热解气产率降低。

The increasing coal rank decreased the gas yields and increased the char yields .

不同煤阶煤的CS2-NMP萃取率及与煤性质的关联

Extraction yield of different rank coals in cs_2-nmp and their relation with coals property

文中针对沁水盆地高煤阶、低渗透的特点，进行注CO2提高采收率模拟研究，研究结果表明多分支水平井注入CO2能够明显提高煤层气采收率。

Aiming at the high rank coal , low permeability characteristics of Qinshui Basin , this paper carried out CO2 injection enhanced oil recovery simulation , the results show that injecting CO2 can significantly increase the CBM recovery rate of multi-lateral horizontal wells .

热解过程中半焦的H/C和O/C变化关系与VanKrevelen图上典型煤阶的H/C和O/C关系类似。

The relationship of change of H / C and O / C during pyrolysis is similar with van Krevelen diagram of H / C and O / C of typical coal rank .

煤层储气能力是制约含气量大小的主要因素，它随着煤阶的增高和埋深的增加而增高，在埋深小于800m时最明显。

The gas reserve capacity is the essential factor controlling the gas-bearing amount in coal measures , which increases with the growth of coal ranks and burial depths ( the most distinct example is when the burial depth is less than800m ) .

对五种不同煤阶的煤样在25℃的条件下以苯和四氯化碳的混合液为重液进行重介离心浮沉分选，每个煤样从1.320g/cm3到1.459g/cm3分为五个密度级。

Coals with different ranks were separated respectively into five density grades ranging from 1.320g/cm3 to 1.459g/cm3 in heavy media ( C6H6-CCl4 ) at 25 ° C using centrifugal float-sink separation technique . The separation efficiency of each coal differed significantly .

海拉尔盆地具有多煤阶煤分布。

The coals with different coal ranks occurrence in Hailaer basin .

世界低煤阶煤资源及其分类

Resources of low rank coal in the world and its classification

我国高低煤阶煤层气成藏的差异性

Forming differences between high and low coal rank coalbed methane reservoirs

浅层低煤阶煤层气成藏条件分析

Analysis of the forming conditions of shallow low-rank coalbed gas pool

浅议我国低煤阶地区的煤层气勘探思路

Discussion on finding coalbed methane in low rank coal in China

煤炭切削力学模型的研究不同煤阶煤岩力学参数测试

Mechanical model of coal cutting testing study on mechanical parameters of coal

低煤阶煤热解煤气性质研究

Study on the pyrolysis gas properties from low rank coals

岩相及煤阶对煤的燃烧特性的影响

Influences of maceral and rank on combustion characteristic of coal

煤阶对煤吸附能力影响的微观机理研究

Microscopic Mechanism Study on the Influence of Coal Rank on Adsorption Capacity

低煤阶煤层气藏水动力条件的物理模拟实验

Experimental Study on Physical Modeling of Hydrodynamic Condition in Low-Rank Coalbed Methane Reservoir

高煤阶煤的阶跃性演化机理研究

Study on the step evolution mechanism of high-rank coal

焦炭氮向NO的转化率随着煤阶程度的增高而增高。

The conversion rate increased with increasing coal rank .

煤阶对无烟煤型焦质量的影响

Effect of coal ranks on quality of formed coke

06%～0.9%煤阶范围内。

Ranges from 0.6 % to 0 '9 % .

煤阶对煤的吸附能力的影响

Influence of coal rank on coal adsorption capacity

高煤阶无烟煤热爆机理研究

Study on thermal cracking of high rank anthracite

不同煤阶煤成焦过程中密度及挥发分的变化

Variation of true relative density and volatile during coking process of different rank coals

中国高煤阶地区的煤层气勘探理论与实践

Coalbed methane exploration theory and practice in the high coal rank areas of China

煤粉产出对高煤阶煤层气井产能的影响及其控制

Destructive influences and effectively treatments of coal powder to high rank coalbed methane production

烃源岩有机质成熟度／煤阶研究方法

The review of study of thermal maturity of organic matter in hydrocarbon source rocks

GB/T2566-1995低煤阶煤的透光率测定方法

Determination of transmittance for low rank coal

本文介绍了世界低煤阶煤炭资源及其分类。

The resources of low rank coal in the world have introduced in this paper .

浅议我国低煤阶地区煤层气的成藏特点&从甲烷风化带的角度

Discussion on low rank coalbed methane between China and U.S.A. from the methane oxidation zone