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首页> 外文期刊>Environmental Science & Technology >Process for Capturing CO_2 Arising from the Calcination of the CaCO_3 Used in Cement Manufacture
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Process for Capturing CO_2 Arising from the Calcination of the CaCO_3 Used in Cement Manufacture

机译：由水泥生产中使用的CaCO_3的煅烧捕获CO_2的方法

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This paper outlines a new CaCO_3 calcination method for producing a stream of CO_2 (suitable for permanent geological storage after purification and compression). The process is based on the use of very hot CaO particles (T > 1000 ℃) to transfer heat from a circulating fluidized bed combustor (CFBC) to a calciner (fluidized with CO_2 and/or steam). Since the fluidized bed combustor and calciner have separate atmospheres, the CO_2 resulting from the decomposition of CaCO_3 can be captured, while the CO_2 generated in the combustion of the fuel in air is emitted to the atmosphere. We demonstrate that with this system it is possible to reduce the CO_2 emissions of a cement plant by around 60%. Furthermore, since the key pieces of equipment are similar to the commercial CFBCs used in power generation plants, it is possible to establish the additional investment required for the system and to estimate the cost per ton of CO_2 avoided for this process to be about 19 $/tCO_2 avoided.
机译：本文概述了一种新的CaCO_3煅烧方法，用于生产CO_2流（适用于纯化和压缩后的永久地质存储）。该工艺基于使用非常热的CaO颗粒（T> 1000℃）将热量从循环流化床燃烧器（CFBC）传递到煅烧炉（经CO_2和/或蒸汽流化）。由于流化床燃烧器和煅烧炉具有分开的气氛，因此可以捕获由CaCO_3分解产生的CO_2，而在空气中燃料燃烧时产生的CO_2则排放到大气中。我们证明，使用该系统可以将水泥厂的CO_2排放降低约60％。此外，由于关键设备类似于发电厂中使用的商用CFBC，因此有可能建立该系统所需的额外投资，并估计此过程避免的每吨CO_2成本约为19 $ / tCO_2避免了。

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