TECHNOLOGY OPTIONS FOR CLEAN COAL POWER GENERATION WITH CO 2 CAPTURE
暂无分享,去创建一个
Coal contributes to about forty percent of the electricity generation in the world today and is expected to maintain its dominant share in the foreseeable future. The state-of-the-art coal-fired power plant today with 600 oC steam temperature is about 20% more efficient than the average operating power plants, and can reduce emissions such as SO2, NOx, and mercury to ultra-low levels. Hitachi is developing a full portfolio of new clean coal technologies aimed at further efficiency improvement, 90% CO2 reduction, and near-zero emissions of other pollutants. The technologies under development include 700 oC next generation ultrasupercritical boilers and steam turbines, post-combustion CO2 absorption, oxyfuel combustion, and IGCC with CO2 capture. This paper provides an overview of the development status of the technologies and discusses their expected performance and economic impacts, with special focus on post-combustion absorption and oxyfuel combustion which are promising near-term solutions of CO2 capture for new and existing power plants.