Emissions of nitrogen oxides in pulverized peat combustion between 730 and 900 °C

✍ Scribed by Martti J. Aho; Jarmo T. Rantanen

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 567 KB
• Volume: 68
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(89)90154-3

✦ Synopsis

Five Finnish peats were burned in an entrained flow reactor at temperatures between 730 and 900°C to study the conversion of peat nitrogen to nitrogen oxides (N,O, NO and NO,) in conditions simulating lowtemperature, unstaged pulverized fuel combustion.

Oxygen content was varied between 1 and 18%. The major product was NO (conversion of fuel-N to NO varied between 10 and 43 %), but the concentration of N,O was high at low temperatures and at 730°C the degree of conversion of fuel-N to N,O sometimes exceeded that of fuel-N to NO. Unlike NO, the formation of N,O was not sensitive to oxygen content of the reaction environment, and it decreased with increasing O/N ratio in the peat. This led to marked differences in the molar concentrations of N,O in the flue gas from different peats between 730 and 800°C. Particle sizes in the range 16-205 pm and moisture contents of S-20 'A had no observed effect on fuel nitrogen conversions. Conversion of fuel-N to NO, was < 1%.