从图2.3中可以看出，二氧化碳的粘度随着温度的增大而增大，这也符合气体

从图2.3中可以看出，二氧化碳的粘度随着温度的增大而增大，这也符合气体的粘度性质，当温度较低时其粘度几乎不随压力的变化而发生改变，但是当温度超过10℃左右时，其粘度会由于压力的增加而减小。和密度一样，在超临界状态二氧化碳的粘度也会发生较大的转变，当压力超过7.38Mpa时其粘度会迅速降低，远远小于液态的，几乎和气态的相当，这样就会很大程度上的减少介质在管道中的摩阻，更有利于管道输送。

From Figure 2.3, it can be seen that the viscosity of carbon dioxide increases with the increase of temperature, which is also in line with the viscosity properties of gases. When the temperature is low, its viscosity hardly changes with the change of pressure. However, when the temperature exceeds about 10 ℃, its viscosity decreases due to the increase of pressure. Like density, the viscosity of carbon dioxide in the supercritical state also undergoes a significant transition. When the pressure exceeds 7.38Mpa, its viscosity rapidly decreases, much smaller than that of the liquid state and almost equivalent to that of the gas state. This greatly reduces the friction of the medium in the pipeline and is more conducive to pipeline transportation.

As can be seen from Figure 2.3, the viscosity of carbon dioxide increases with the increase of temperature, which is also in line with the viscosity property of gas. When the temperature is low, its viscosity hardly changes with the change of pressure, but when the temperature exceeds about 10℃, its viscosity will decrease due to the increase of pressure. Like density, the viscosity of carbon dioxide will change greatly in supercritical state. When the pressure exceeds 7.38Mpa, its viscosity will decrease rapidly, far less than that in liquid state and almost equal to that in gas state, which will greatly reduce the friction of the medium in the pipeline and be more conducive to pipeline transportation.