Oxidation of coal and coal pyrite mechanisms and influence on surface characteristics. Progress report | Zendy

Fiona M. Doyle | Zendy

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Oxidation of coal and coal pyrite mechanisms and influence on surface characteristics. Progress report

Author(s) -

Fiona M. Doyle

Publication year - 1995

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/71641

Subject(s) - coal , pyrite , chemistry , aqueous solution , chemical engineering , ion , ion exchange , partition (number theory) , oxidation state , precipitation , metal , mineralogy , inorganic chemistry , organic chemistry , physics , mathematics , combinatorics , meteorology , engineering

The objective of this research is to develop a mechanistic understanding of the oxidation of coal and coal pyrite, and to correlate the intrinsic physical and chemical properties of these minerals, along with changes resulting from oxidation, with those surface properties that influence the behavior in physical cleaning processes. Work during the eighteenth quarter has focused on severe oxidation of coal by thermal and chemical treatment, and on investigating the partition of metal ions between such strongly oxidized coal samples and aqueous solutions. This partitioning behavior is being followed to obtain further information on the chemistry of the coal surfaces after different oxidation treatments, for example, whether partition occurs by an ion-exchange mechanism, or whether the surface is capable of changing the oxidation state of metallic species, with concurrent surface or bulk precipitation

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