On the rapid estimation of % ash in coal from silicon content obtained via FNAA, XRF, or Slurry‐injection AA
On the rapid estimation of % ash in coal from silicon content obtained via FNAA, XRF, or Slurry‐injection AA
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DOI：
10.1063/1.32925
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发表时间：
2008-07
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影响因子：
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通讯作者：
D. G. Hicks;J. E. O'Reilly;D. W. Kopenaal
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文献类型：
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作者：
D. G. Hicks;J. E. O'Reilly;D. W. Kopenaal
一些典型的美国烟煤的高温灰分含量可以通过% Si和%灰分之间的简单线性关系，以1.7%灰分的标准误差（绝对）快速估计出来。Si含量可以通过快中子活化分析（FNAA）、X射线荧光（XRF）或浆液注入原子吸收光谱（SIAAS）方法快速测定，除了短暂的研磨和称重外，几乎不需要更多的样品制备。这三种仪器方法显示出大致相等的相关性。与以前的报告相比，对数图并没有产生更好的估计数。此外，在一个等级内或从一个地理区域中选择煤炭，相关性似乎没有显著改善。浆液注入原子吸收法不需要对现有的商用AA仪器进行重大修改。测定煤灰分含量的传统方法虽然简单而准确，但需要在实验室中花费大量时间。煤的灰分含量是一个重要的参数，关系到它们最终用作燃料、液化和气化过程的原料以及冶金过程。
The high‐temperature ash levels of some typical U. S. bituminous coals can be rapidly estimated with a standard error (absolute) of 1.7% ash from simple linear correlations between % Si and % ash. Si contents may be rapidly determine by Fast Neutron Activation Analysis (FNAA), X‐Ray Flourescence (XRF), or Slurry‐Injection Atomic Absorption Spectrometry (SIAAS) methods requiring little more sample preparation other than a brief grinding and weighing. These three instrumental methods showed roughly equivalent correlations. In contrast to earlier reports, logarithmic plots do not produce improved estimates. Also, correlations do not seem to be significantly improved by selecting coals within one rank or from one geographical area. The slurry‐injection atomic absorption method does not require significant modifications of existing commercial AA instruments. The conventional method for determining ash content of coal, though simple and accurate, requires a considerable amount of time in the laboratory. Ash content of coals is an important parameter related to their eventual use as fuels, as feedstocks in liquefaction and gasification processes, and in metallurgical processes.