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直接从热力发电站的烟气中分离CO2，然后对其进行储存或加以利用，是控制和减缓温室气体排放的重要措施之一。本文描述了利用吸收、吸附、薄膜分离和低温分离等原理从热力发电站烟气中分离CO2的技术，对它们在4种发电技术上的应用做了分析比较。同时，也给出了一些有可能的储存和利用CO2的途径。“,”One important measure for controlling greenhouse gas CO2 emissions is to capture CO2 from power plant flue gas and store it or utilize it. In this paper, the principal technologies to capture CO2 are introduced,including absorption, adsorption, membrane separation and cryogenic separation. Their application in 4 kinds of power plants is analysed and compared. Some methods to store and utilize CO2 are also discussed.