Peroxidation of Coal— Analysis of Minerals
| Autor: | R. A. Friedel, J. A. Queiser, A. J. Nalwalk |
|---|---|
| Rok vydání: | 1974 |
| Předmět: |
Bituminous coal
chemistry.chemical_classification Chemistry business.industry General Chemical Engineering geology.rock_type Inorganic chemistry Anthracite geology Energy Engineering and Power Technology chemistry.chemical_element Calcium chemistry.chemical_compound Fuel Technology Reagent Organic matter Coal Sulfate business Hydrogen peroxide |
| Zdroj: | Energy Sources. 1:179-187 |
| ISSN: | 1521-0510 0090-8312 |
| DOI: | 10.1080/00908317408945919 |
| Popis: | Inorganic minerals in coals can be identified advantageously if they are concentrated by removal of the organic matter of the coal. The concentrating method involves the use of 30–35% hydrogen peroxide. Several days of treatment with this reagent at 20–80°C are required, depending on the substance; anthracite, the most difficult material, requires a few weeks. Under the conditions used most minerals are stable with the exception of carbonates and pyrites which slowly become oxidized to sulfate. Calcium oxalate was found to form in the peroxidation of lignite which contains appreciable amounts of calcium; no other coal residue studied contained oxalates. Carbon analyses indicated the extent of removal of the organic material. Infrared and X-ray techniques were used to identify the minerals present. Some portions of a bituminous coal were found to be intimate mixtures of organic and mineral matter and were quite resistant to peroxidation. |
| Databáze: | OpenAIRE |
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