Interaction of fuel nitrogen with nitric oxide during reburning with coal

✍ Scribed by Thomas E. Burch; Wei-Yin Chen; Thomas W. Lester; Arthur M. Sterling

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 875 KB
• Volume: 98
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(94)90177-5

✦ Synopsis

lsotopically labeled N150 was used to study the interaction of fuel nitrogen from coal with NO in a simulated reburning environment. Experiments were conducted in an alumina flow reactor operated at ll00°C with a reaction time estimated at 0.2 s. A North Dakota lignite and a Pittsburgh #8 bituminous coal were burned with a simulated flue gas containing 1000 ppm of N~50. Stoichiometric ratios ranged from 0.7 to 1.0. Species and isotope separation were accomplished using GC/MS. The ratio of labeled to unlabeled isotopes of each major nitrogen-containing species varied with stoichiomctry, but not with coal type. Delayed nitrogen evolution from both coals was evident from the data. Data analysis showed that significant N 2 production (i.e., greater than 50%) probably occurred through non-NO pathways. Little N150 was observed, indicating low conversion rates of intermediates to NO after significant nitrogen evolved from the coal.