2-15　Characterization of pyrolysis gas in coals with the different rank using VUV-SPI-TOFMS

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  • 2-15　VUV-SPI-MS装置を用いた異なるランクの石炭乾留ガスの特性評価

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<p>For quantitative analysis of aromatic molecules in coal pyrolysis gas, a VUV-SPI-MS system have been developed to continuously measure the generated gases. Coals with different degrees of carbonization have been heated from room temperature to 800°C, and the generated gases have been measured using this equipment to compare the molecular species generated by the different coals types. It has been found that benzene and toluene are mainly detected in the pyrolysis gas of bituminous coals with relatively low oxygen concentrations, while gases containing OH groups such as phenol and cresol are mainly generated from subbituminous coals with high oxygen concentrations. Solid-state 13C-NMR spectra of coking coals corroborate this result, indicating that the proportion of oxygen bonded to aromatic carbon is greater in younger coals. These two results provide insight into the relationship between coal pyrolysis g as and the structure of the coking coal.</p>

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