Effect of biomass blending on coal ignition and burnout during oxy-fuel combustion
Effect of biomass blending on coal ignition and burnout during oxy-fuel combustion
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DOI：
10.1016/j.fuel.2008.01.020
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发表时间：
2008-09
期刊：
影响因子：
7.4
通讯作者：
B. Arias;C. Pevida;F. Rubiera;J. J. Pis-J.
中科院分区：
文献类型：
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作者：
B. Arias;C. Pevida;F. Rubiera;J. J. Pis-J.
全氧燃料燃烧是一种温室气体减排技术，该技术使用氧气和循环烟气的混合物燃烧煤炭，以获得可供封存的丰富二氧化碳流。本文采用夹带流反应器研究了全氧条件下煤和生物质混合物的着火和燃尽。采用不同浓度的CO2/O2混合物，并与空气作对照。当氧气浓度与空气浓度相同时，在CO2/O2混合物中检测到点火温度的恶化。然而，在氧气浓度为30%或更高时，观察到点火的改善。生物质的掺入明显改善了煤在空气中的点火性能。煤的燃尽率和煤与79%CO2-21%O2的混合物的燃尽率比在空气中低，但当氧浓度为30或35%时，燃尽率有所改善。研究结果表明，在CO2/O2混合物中掺入生物质可以改善煤的燃尽。
Oxy-fuel combustion is a GHG abatement technology in which coal is burned using a mixture of oxygen and recycled flue gas, to obtain a rich stream of CO2 ready for sequestration. An entrained flow reactor was used in this work to study the ignition and burnout of coals and blends with biomass under oxy-fuel conditions. Mixtures of CO2/O2 of different concentrations were used and compared with air as reference. A worsening of the ignition temperature was detected in CO2/O2 mixtures when the oxygen concentration was the same as that of the air. However, at an oxygen concentration of 30% or higher, an improvement in ignition was observed. The blending of biomass clearly improves the ignition properties of coal in air. The burnout of coals and blends with a mixture of 79%CO2–21%O2 is lower than in air, but an improvement is achieved when the oxygen concentration is 30 or 35%. The results of this work indicate that coal burnout can be improved by blending biomass in CO2/O2 mixtures.