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The time evolution analysis of methane reburn process at high temperature
Author(s) -
Wang Enlu,
Xu Xuchang,
Zhang Mingchuan
Publication year - 2012
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.579
Subject(s) - methane , stoichiometry , chemistry , atmosphere (unit) , nitrogen , radical , analytical chemistry (journal) , thermodynamics , organic chemistry , physics
The time evolution of the methane reburn process at high temperature was investigated by the simulation method. The simulated results show that the time evolutions of each component are different with the stoichiometric ratio (SR) of the reburn zone and the reaction time. In the simulation conditions, CH 4 , C 2 H 2 , and H appear as SR is from 0.66 to 0.96; CH 3 appears as SR is from 0.66 to 0.76; HCN, NH 3 , and HNCO appear as SR is from 0.66 to 0.86; OH appears as SR is from 0.82 to 0.96. In the case with SR of 0.76, C 2 H 2 and CH 3 only appear in the initial 0.2 s, NH 3 and HNCO appear in the whole 2.0 s; In the case with SR of 0.82, C 2 H 2 also appears in the initial 0.2 s, NH 3 and HNCO only appear in initial 0.5 s, CH 3 does not appear in the whole reaction time of 2.0 s. The reaction between CH 3 and NO mainly occurs in the strong reducing atmosphere, and contributes significantly to remove NO to HCN, NH 3 , and HNCO. The interactions of NO with H and OH radicals mainly occur in the weak reducing atmosphere, and contribute to remove a small part of NO to N 2 . Through comparing the time evolutions of total fixed nitrogen (TFN) with different SR, it is suggested that the optimum SR for reducing TFN in the methane reburn process is about 0.82. © 2011 Curtin University of Technology and John Wiley & Sons, Ltd.