期刊
INTERNATIONAL JOURNAL OF COAL GEOLOGY
卷 170, 期 -, 页码 7-13出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.coal.2016.02.002
关键词
Mercury; Trace elements; Coal; South Africa; Pyrite; Laser ablation ICP-MS
资金
- European Union
- USGS Energy Resources Program
Eight density separates of Permian Highveld (#4) coal were investigated for partitioning of Hg and trace elements. The separates include float fractions obtained in heavy media having densities of 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, and 2.0 g/cm(3), and the sink fraction for 2.0 g/cm(3). Bulk analysis of the separates shows strong (R-2 >= 0.80) positive correlations between pyritic sulfur and mercury, and between ash yield and both pyritic sulfur and mercury. Laser ablation (IA) ICP-MS analysis of individual pyrite grains in the separates confirms association of Hg and As with pyrite as indicated by bulk analysis. Other elements detected in pyrite by LA-ICP-MS include Mn, Co, Ni, Ti, and Pb. Results for the separates allow prediction of Hg, trace elements, and ash yields expected in specific South African coal products. These range from 0.06 ppm Hg and an ash yield of 11.5% ash for the export fraction to 0.47 ppm Hg and an ash yield of 60.9% for the discard (stone) fraction (dry basis). Results show pronounced differences expected between coal used for domestic power generation and coal which is exported. Published by Elsevier B.V.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据