由于杂质的存在扩大了二氧化碳的两相区范围，因此在二氧化碳进行增压和升温

由于杂质的存在扩大了二氧化碳的两相区范围，因此在二氧化碳进行增压和升温过 程中尤其要对其进行检测，若再此过程中介质的状态处于两相区，若采用泵进行增压，则很容易发生汽蚀现象，因此在实际操作过程中应该尽量调整其工艺条件，使其避免进入两相区。

Due to the presence of impurities, the range of the two-phase zone of carbon dioxide is expanded. Therefore, it is particularly important to detect carbon dioxide during its pressurization and heating process. If the medium is in the two-phase zone during this process, using a pump for pressurization can easily cause cavitation. Therefore, in actual operation, the process conditions should be adjusted as much as possible to avoid entering the two-phase zone.

Because the existence of impurities enlarges the range of two-phase zone of carbon dioxide, it is especially necessary to detect carbon dioxide during the process of pressurization and temperature rise. If the medium is in the two-phase zone during this process, cavitation will easily occur if the pump is used for pressurization, so the process conditions should be adjusted as much as possible in the actual operation to avoid it entering the two-phase zone.