Experimental study of ash formation during pulverized coal combustion in O2/CO2 mixtures
Experimental study of ash formation during pulverized coal combustion in O2/CO2 mixtures
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DOI：
10.1016/j.fuel.2007.07.023
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发表时间：
2008-06-01
期刊：
影响因子：
7.4
通讯作者：
Li, Yi
中科院分区：
文献类型：
--
作者：
Sheng, Changdong;Li, Yi
本文主要研究粉煤 O-2/CO2 燃烧过程中的矿物转化和灰分形成。四种中国动力煤在落管式炉中燃烧，在不同的燃烧条件下产生灰烬。通过 XRD 分析和 Fe-57 穆斯堡尔光谱对灰分样品进行了表征。通过O-2/CO2燃烧与O-2/N-2燃烧的比较，探讨了O-2/CO2燃烧对矿物转化和灰分形成的影响。结果发现，O-2/CO2 燃烧并没有显着改变残灰中形成的矿物相，但确实影响了矿物相的相对量。在两种气氛中形成的灰烬中观察到的差异归因于气体气氛对煤焦颗粒燃烧温度的影响，从而影响了所含矿物的灰烬形成行为。 (c) 2007 Elsevier Ltd. 保留所有权利。
The present paper was addressed to mineral transformations and ash formation during O-2/CO2 combustion of pulverized coal. Four Chinese thermal coals were burned in a drop tube furnace to generate ashes under various combustion conditions. The ash samples were characterized with XRD analysis and Fe-57 Mossbauer spectroscopy. The impacts Of O-2/CO2 combustion on mineral transformation and ash formation were explored through comparisons between O-2/CO2 combustion and O-2/N-2 combustion. It was found that, O-2/CO2 combustion did not significantly change the mineral phases formed in the residue ashes, but did affect the relative amounts of the mineral phases. The differences observed in the ashes formed in two atmospheres were attributed to the impact of the gas atmosphere on the combustion temperatures of coal char particles, which consequently influenced the ash formation behaviors of included minerals. (c) 2007 Elsevier Ltd. All rights reserved.