多元杂质对CO_(2)相态特性影响研究

Study on the Effect of Multiple Impurities on the Phase Properties of CO_(2)

在CCUS技术中,CO_(2)输送作为纽带将整个系统连接起来。CO_(2)输送的几种方式中,管道输送从长期来看是最经济的输送方式。CO_(2)由于特殊的物性特点,使其在管道输送条件下很容易发生相变,为管道安全输送带来风险。而捕集到的CO_(2)会掺杂一些气体杂质,这些气体杂质会影响CO_(2)的临界点和气液两相区,从而影响发生相变的温压条件。因此,对常见的气体杂质与CO_(2)的混合气进行相态特性分析,得到气体杂质类型及含量对CO_(2)相态的影响规律,并研究二元杂质对CO_(2)的综合影响情况,为CO_(2)管道输送条件的选择提供数据支撑。

In CCUS technology,CO_(2) transport serves as the link to connect the whole system.Among the several methods of CO_(2) transport,pipeline transport is the most economical way in the long run,but the special physical characteristics of CO_(2) make it easy to undergo phase change under pipeline transport conditions,which poses a risk for safe pipeline transport.The captured CO_(2) is mixed with some gas impurities,which affect the critical point of CO_(2) and the gas-liquid two-phase region,thus affecting the temperature and pressure conditions under which the phase change occurs.In this paper,the phase properties of common gas impurities mixed with CO_(2) were analyzed,the influence law of gas impurity types and contents on CO_(2) phase state was obtained,and the comprehensive influence of binary impurities on CO_(2) was studied to provide data support for the selection of CO_(2) pipeline transportation conditions.