Sulfur trioxide formation during oxy-coal combustion
Sulfur trioxide formation during oxy-coal combustion
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DOI：
10.1016/j.ijggc.2011.05.009
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发表时间：
2011-01-01
影响因子：
3.9
通讯作者：
Eddings, Eric G.
中科院分区：
文献类型：
--
作者：
Ahn, Jiyoung;Okerlund, Ryan;Eddings, Eric G.
这项研究的目的是研究增加两种不同类型的前试剂炉中氧气和二氧化碳浓度增加对三氧化硫三氧化硫的影响解雇系统。对于粉碎 - 煤（PC）测试，与空气燃烧条件相比，氧气供应条件的SO（3）等浓度明显更高。平均大4-6倍。当发射低硫磺犹他州沥青煤时，（3）发射氧气与发射空气相似，与伊利诺伊州煤相比，总体水平非常低，与燃料硫含量的差异一致。对于伊利诺伊州和犹他州的煤炭，在空气播种条件下与氧气燃料相对于氧气燃料，PC燃烧的质量基础（每单位能量输入质量（3）每单位能量输入）表示（3）排放量。还使用犹他州低硫磺煤进行，因此（3）氧气与发射空气的浓度明显更高，与相似的浓度水平相反观察到PC射击。当以归一化质量为基础进行比较时，空气和氧气的排放均相似，这与该煤的PC诱发结果也相反。 （c）2011 Elsevier Ltd.保留所有权利。
The purpose of this study was to investigate the effects of increased oxygen and carbon dioxide concentration on the formation of sulfur trioxide during oxy-coal combustion in two different types of pilot-scale furnaces: a pulverized-coal and a circulating-fluidized-bed-fired system. For pulverized-coal (PC) testing, concentrations of SO(3) and SO(2) were significantly higher for oxy-fired conditions as compared to air-fired conditions.For a high-sulfur Illinois bituminous coal, SO(3) concentrations were 4-6 times greater on average. When firing a low-sulfur Utah Bituminous coal, SO(3) concentrations were similar for oxy-firing vs. air-firing, and the overall levels were very low compared to the Illinois coal, consistent with differences in the fuel sulfur contents. PC-fired emissions on a normalized mass basis (mass SO(3) per unit energy input) indicated higher SO(3) emissions under air-fired conditions vs. oxy-firing, for both the Illinois and Utah coals.Circulating fluidized bed testing was also carried out using the low-sulfur Utah coal, and SO(3) concentrations were notably higher for oxy-firing vs. air-firing, in contrast to the similar concentration levels observed for PC-firing. When compared on a normalized mass basis, the emissions were similar for both air- and oxy-firing, which is also in contrast to the PC-fired results for this coal. (C) 2011 Elsevier Ltd. All rights reserved.