对于大规模、长距离输送二氧化碳来说，管道运输是最经济的输送方式，但是介

对于大规模、长距离输送二氧化碳来说，管道运输是最经济的输送方式，但是介质 在管道中所处的状态会因外部条件的改变而发生变化，从而导致其输送的难以程度及输送的经济性发生变化，为了研究不同条件下的二氧化碳的性质规律及流动性能，有必要从二氧化碳本身的性质出发，通过研究二氧化碳的物理化学性质，分析其在不同条件下管道流动特性，为更好的开展后学的二氧化碳集输处理工作奠定基础。

For large-scale and long-distance transportation of carbon dioxide, pipeline transportation is the most economical transportation method. However, the state of the medium in the pipeline may change due to changes in external conditions, resulting in changes in the difficulty and economy of transportation. To study the properties and flow performance of carbon dioxide under different conditions, it is necessary to start from the properties of carbon dioxide itself, By studying the physical and chemical properties of carbon dioxide and analyzing its flow characteristics in pipelines under different conditions, a foundation is laid for better future research on carbon dioxide collection and transportation.

For large-scale and long-distance transportation of carbon dioxide, pipeline transportation is the most economical way, but the state of the medium in the pipeline will change due to the change of external conditions, which will lead to the change of its transportation difficulty and transportation economy. In order to study the properties and flow performance of carbon dioxide under different conditions, it is necessary to study the physical and chemical properties of carbon dioxide and analyze its pipeline flow characteristics under different conditions, so as to lay a foundation for better development of carbon dioxide gathering and transportation treatment.