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Combustion characteristics of coal in a mixture of oxygen and recycled flue gas

机译：氧气和循环烟气混合物中煤的燃烧特性

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摘要

The combustion of coal in a mixture of pure O_2 and recycled flue gas is one variant of a novel combustion approach called oxy-fuel combustion. With the absence of N_2, this approach leads to a flue gas stream highly enriched in CO_2. For many applications, this flue gas stream can then be compressed and sequestered without further separation. As a result, oxy-fuel combustion is an attractive way to capture CO_2 produced from fossil fuel combustion. When coal is burned in this O_2 and CO_2 rich environment, its combustion characteristics can be very different from conventional air-fired combustion. In CETC-O, a vertical combustor research facility has been used in the past years to investigate the combustion characteristics of several different coals with this variant of oxy-fuel combustion. This included flame stability, emissions of NO_x, SO_x. and trace elements, heat transfer, in-furnace flame profiles and flue gas compositions. This paper will report some of the major findings obtained from these research activities.
机译：纯O_2和再循环烟气的混合物中的煤燃烧是一种称为氧燃料燃烧的新型燃烧方法的一种变体。在没有N_2的情况下，这种方法会导致烟气中的CO_2高度富集。对于许多应用而言，该烟气流可以在没有进一步分离的情况下被压缩和隔离。结果，氧燃料燃烧是捕获由化石燃料燃烧产生的CO 2的有吸引力的方式。在这种富含O_2和CO_2的环境中燃烧煤炭时，其燃烧特性可能与传统的空气燃烧非常不同。在CETC-O中，过去几年中使用了垂直燃烧器研究设施，以研究具有这种氧-燃料燃烧变体的几种不同煤的燃烧特性。这包括火焰稳定性，NO_x，SO_x的排放。微量元素，传热，炉内火焰分布和烟气成分。本文将报告从这些研究活动中获得的一些主要发现。

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