The fate of sodium during pulverized coal combustion
The fate of sodium during pulverized coal combustion
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DOI：
10.1016/0016-2361(85)90429-6
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发表时间：
1985-03
期刊：
影响因子：
7.4
通讯作者：
M. Neville;A. Sarofim
中科院分区：
文献类型：
--
作者：
M. Neville;A. Sarofim
钠在煤燃烧过程中产生的不同尺寸的飞灰中的分布提供了有用的见解钠的蒸发和冷凝机制。对于残余飞灰，钠的浓度偏离与颗粒尺寸成反比的平方依赖关系可以用来推断钠蒸发的程度。对于低阶煤，大多数钠在燃烧温度<1900 K时蒸发;在较高温度下，随着与二氧化硅反应的量增加，钠的释放减少。钠在亚微米烟气中的冷凝分数受总灰分蒸发量和开尔文效应的影响。
The distribution of sodium in the different sizes of fly ash produced during coal combustion provides useful insights into the vaporization and condensation mechanisms for sodium. For the residual fly ash, the departure of the concentration of sodium from an inverse square dependence on particle size can be used to infer the degree of sodium vaporization. For low-rank coals most of the sodium vaporizes at combustion temperatures <1900 K; at higher temperatures the release of sodium decreases as increasing amounts react with silica. The fraction of sodium condensing on the submicrometre fume is influenced both by the amount of total ash vaporized and by the Kelvin effect.