矿井气组成
煤层气的甲  烷含量可高达80%以上，而矿井气的甲烷含量则决定于煤层气的涌出量。变质程度深的年老煤层的煤层气蕴藏量一般较丰富，故其涌出量大，所产矿井气的甲烷含量也高。例如，中国山西省阳泉无烟煤矿井的矿井气组成一般为甲烷约41%,氮约47%,氧约12%，其低位发热量约为14～15兆焦/米3。如果采用煤层内钻孔作纯甲烷排放，可保持煤层气的原来组成。矿井气作为城市燃气气源时，其甲烷含量应不低于35%，低位发热量不低于12.5兆焦/米3。甲烷含量低的矿井气可做矿区其他用途的燃料。

浩瀚色谱（山东）应用技术开发有限公司，研发5A填充柱测定矿井气中氧，氮，甲烷，结果满意。
 

名称：填充柱

固定相：分子筛

规格：1.2m*3mm

粒度“60-80目

型号：MS-5Å

应用：安捷伦，赛默飞，瓦里安，PE，布鲁克及所有国产气相色谱仪使用
 

Mine gas composition
The methane content of coalbed methane can be as high as 80% or more, while the methane content of mine gas depends on the amount of coalbed methane gushing out. The coalbed methane reserves of the old coal seams with deep metamorphism are generally rich, so the gushing volume is large, and the methane content of the mine gas produced is also high. For example, the mine gas composition of the Yangquan anthracite coal mine in Shanxi Province, China is generally about 41% methane, about 47% nitrogen, and about 12% oxygen, and its low-level calorific value is about 14-15 MJ/m3. If the pure methane emission is carried out by drilling holes in the coal seam, the original composition of the coal seam methane can be maintained. When mine gas is used as urban gas source, its methane content should not be less than 35%, and its low-level calorific value should not be less than 12.5 MJ/m3. Mine gas with low methane content can be used as fuel for other uses in the mining area.

Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. developed a 5A packed column to measure oxygen, nitrogen, and methane in mine gas, and the results were satisfactory.

Name: Packed Column

Stationary Phase: Molecular Sieve

Specifications: 1.2m*3mm

Particle size "60-80 mesh

Model: MS-5Å

Application: Agilent, Thermo Fisher, Varian, PE, Bruker and all domestic gas chromatographs