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Homogeneous nitrous oxide formation and destruction under combustion conditions
Author(s) -
Hulgaard Tore,
DamJohansen Kim
Publication year - 1993
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690390811
Subject(s) - chemistry , decomposition , nitrous oxide , ammonia , inorganic chemistry , combustion , homogeneous , nitrogen , oxide , redox , kinetics , reaction mechanism , catalysis , organic chemistry , thermodynamics , physics , quantum mechanics
N 2 O decomposition and formation during the oxidation of NH 3 and HCN were studied in a quartz flow reactor in the presence of CO, NO and other gases. The emphasis is on the influence of CO and NO. In addition, the homogeneous nitrogen chemistry of fluidized bed combustion and the selective noncatalytic reduction of NO (SNR) are discussed. The rate of N 2 O decomposition in N 2 agrees with a first‐order rate expression. The presence of CO or H 2 increases the decomposition rate regardless of the additional presence of O 2 For the formation of N 2 O, HCN oxidation is more efficient than NH 3 oxidation. The presence of NO increases the amount of N 2 O formed during the oxidation of HCN or NH 3 .CO moves the N 2 O formation toward lower temperatures. H 2 O increases the reaction rate where few components are present, whereas H 2 O has little influence in the presence of large amounts of a combustible component such as CO. There are indications that NO is a necessary intermediate for any significant formation of N 2 O during the oxidation of NH 3 and HCN. NO reduction is obtained when NO is initially present during oxidation of both NH 3 and HCN. These results are comparable to the respective SNR results with reductant ammonia and urea.