二氧化碳中的杂质成分主要有N2、CH 4 ，他们的存在必然会对管道的输

二氧化碳中的杂质成分主要有N2、CH 4 ，他们的存在必然会对管道的输送性能造成 一定的影响，因此分析含氮气和甲烷不同摩尔分数含量为：0.5%、1%和2%的混合气体 管道性能，通过Hysys模拟得出如下图结论，氮气和甲烷的存在对气态和超临界态二氧 化碳管道的影响很小，他们对这两种状态管道的压降和温降的影响程度可以忽略，但是氮气和甲烷的存在对液态二氧化碳管道的影响较大：

The impurity components in carbon dioxide mainly include N2 and CH4, and their presence will inevitably have a certain impact on the transportation performance of pipelines. Therefore, analyzing the performance of mixed gas pipelines containing nitrogen and methane with different molar fractions of 0.5%, 1%, and 2%, Hysys simulation shows that the presence of nitrogen and methane has little impact on the gas and supercritical carbon dioxide pipelines, as shown in the following figure, Their impact on the pressure drop and temperature drop of pipelines in these two states can be ignored, but the presence of nitrogen and methane has a significant impact on liquid carbon dioxide pipelines:

Impurities in carbon dioxide mainly include N2 and CH 4, and their existence will inevitably affect the transportation performance of the pipeline. Therefore, the performance of the mixed gas pipeline with different mole fractions of nitrogen and methane: 0.5%, 1% and 2% is analyzed, and the following figure is drawn through Hysys simulation. The existence of nitrogen and methane has little influence on the gas and supercritical carbon dioxide pipelines, and their influence on the pressure drop and temperature drop of the pipelines in these two States can be ignored.