Analytical and Characterization Studies of Organic and Inorganic Species in Brown Coal
| Autor: | G. Domazetis, John Liesegang, Narelle Brack, R. Glaisher, Bruce D. James, Paul J. Pigram, Monthida Raoarun |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
chemistry.chemical_classification
Chemistry General Chemical Engineering Inorganic chemistry technology industry and agriculture Analytical chemistry Energy Engineering and Power Technology chemistry.chemical_element complex mixtures Chloride Sulfur chemistry.chemical_compound Fuel Technology X-ray photoelectron spectroscopy Elemental analysis medicine Hydroxide Phenol Carbon Inorganic compound medicine.drug |
| Zdroj: | Energy & Fuels. 20:1556-1564 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/ef0502251 |
| Popis: | Detailed studies have been carried out on the distribution of organic functional groups and inorganic species in as-received (ar) and acid-washed (aw) brown coals using elemental analysis, energy dispersive X-ray analysis (SEM-EDX), X-ray photoelectron spectroscopy (XPS), and Time-of-flight−secondary ion mass spectrometry (TOF−SIMS). Surface concentrations of the various carbon groups, organic oxygen, and inorganic hydroxide were obtained using XPS, but oxygen from clay and quartz, if present, interfered with organic oxygen determinations for the coals. A comparison of ar and aw coals using XPS and SEM-EDX is provided in terms of inorganic and organic sulfur groups. Chloride in these coals is present mainly as acid extractable forms, but small amounts of chloride in the organic matrix were indicated by the elemental analysis of ultra low-ash coals. TOF−SIMS fragments from brown coals were indicative of polymers consisting mainly of single aromatic groups linked by hydrocarbons with carboxyl and phenol fun... |
| Databáze: | OpenAIRE |
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