Analysis of Nitrogen-Containing Species during Pyrolysis of Coal at Two Different Heating Rates

• Published in: Energy & fuels Vol. 14; no. 1; pp. 184 - 189
• Main Authors: Kidena, Koh, Hirose, Yoshihisa, Aibara, Toshihiro, Murata, Satoru, Nomura, Masakatsu
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 01.01.2000
• Subjects: Applied sciences; Combustion of solid fuels; Combustion. Flame; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Theoretical studies. Data and constants. Metering; Ammonia; Pyrolysis; Hydrogen Cyanides; Model compound; Coal; Combustion; Nitrogen; Pollutant emission; Curie temperature
• ISSN: 0887-0624; 1520-5029
• DOI: 10.1021/ef9901241

The effect of heating rate on the conversion of nitrogen in coal to nitrogen-containing species during pyrolysis of coal was investigated. Two pyrolysis apparatuses were employed in this study. One was an infrared image furnace (IIF) which can heat a sample up to 1100 °C at a heating rate of 10 K/s. The other apparatus was a Curie-point pyrolyzer (CPP) whose heating rate was around 3000 K/s. Conversion of nitrogen in coal to HCN from CPP pyrolysis at 1040 °C was higher than that in the case of IIF pyrolysis at 1000 °C. On the other hand, IIF pyrolysis experiments at 1000 °C produced large amounts of N2 from low rank coals. The results indicate that heating rate can be one of the dominant factors affecting the behavior of nitrogen release as a range of heating rate applied in this study. The pyrolysis of a nitrogen-containing model polymer showed similar behavior to coal pyrolysis.