Thermogravimetry−Photoionization Mass Spectrometry of Different Rank Coals
| Autor: | William H. Calkins, David. L. Zoller and, Jasna Tomić, Murray V. Johnston, and Xiaogong Wang |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
business.industry
General Chemical Engineering technology industry and agriculture Analytical chemistry Energy Engineering and Power Technology chemistry.chemical_element respiratory system Mass spectrometry complex mixtures Sulfur respiratory tract diseases Solvent Thermogravimetry chemistry.chemical_compound Fuel Technology chemistry otorhinolaryngologic diseases Mass spectrum Coal Phenols business Pyrolysis |
| Zdroj: | Energy & Fuels. 13:1097-1104 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/ef990069w |
| Popis: | Volatile matter evolved during pyrolysis of 20 different rank coals was studied by thermogravimetry−photoionization mass spectrometry (TG-PI-MS). The composition of the TGA effluent revealed several significant trends with coal rank. First, the relative intensities of peaks due to compounds containing oxygen such as CnH2nO (n = 2, 3, or 4), phenols, and dihydroxybenzenes decreased with increasing coal rank. Also, the relative intensities of peaks due to aromatic compounds such as naphthalenes, phenanthrenes, and pyrenes increased with increasing coal rank. Mass signals due to sulfur compounds evolved from coal showed qualitative correlations between CS2 (%TIC) and pyritic sulfur content and between CH3SH (%TIC) and aliphatic sulfur content. Several of the coals were extracted with a solvent to remove the soluble portion of the coal. TG-PI-MS analysis of the raw coal, extracted material and coal residue remaining after solvent extraction produced very similar mass spectra. These results suggest that the ma... |
| Databáze: | OpenAIRE |
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