A method for the determination of pyrite in coal
β Scribed by C. H. Kos
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 194 KB
- Volume
- 101
- Category
- Article
- ISSN
- 0165-0513
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β¦ Synopsis
Abstract
A rapid and simple method for the determination of pyrite in coal, based upon a twoβstep extraction of iron from coal is presented. After milling the coal in a tungstenβcarbide vessel, the nonβpyritic iron is first removed and then the pyritic iron dissolved. This is then followed by AAS analysis. Analysis of pyritic sulfur and total iron in four types of coal demonstrate the reliability of this method.
π SIMILAR VOLUMES
A procedure was developed for determining the pyritic sulfur content of the products from physical coal separation processes on the basis of their total sulfur and ash analyses. By assuming that the organic sulfur content in the combustible material in a given coal is constant, a linear relationship
A thorough investigation into the British Standard method for the determination of pyritic sulphur has shown that it is not suitable for all Australian coals, and that instead, the direct or non-simultaneous method should be adopted. Determinations of the iron which is not extractable with nitric ac
X-ray Photoelectron Spectroscopy (XPS) was used to study mineral, synthetic and coalassociated pyrites, oxidized for various time intervals at low temperatures with humid air or oxygen. This was done to find out if XPS could detect, monitor and clarify pyrite surface-oxidative changes that influence