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Effects of bias combustion on volatile nitrogen transformation
Author(s) -
Zhang Xiaohui,
Sun Shaozeng,
Sun Rui,
Li Xiaoli,
Zeng Guang
Publication year - 2009
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.335
Subject(s) - combustion , nitrogen , chemkin , pyrolysis , chemistry , pollutant , coal combustion products , process engineering , nitrogen oxides , coal , waste management , chemical engineering , environmental chemistry , organic chemistry , engineering
Nitrogen oxides (NO x ) are among the principal pollutants from coal combustion, which have caused serious environmental issues around the world. Many advanced combustion systems have been developed to reduce NO x emissions. Technologies that combine low NO x burners (LNB) and air staging systems have been widely used as they can control the formation of volatile NO x effectively. In this paper, the process of volatile nitrogen release was simulated using the FG–DVC pyrolysis model, in order to provide reliable reference for designing LNBs and air staging combustion systems. The mechanism of NO x emission from volatile N in a combustion system was studied with CHEMKIN 4.1 package, which demonstrated that noticeable reduction of NO x could be obtained at an equivalence ratio (ER) of 1.22, which was 3–4% and 10–15% higher than that at an ER of 0.77 and 0.39, respectively. Sensitivity study of all basic reactions indicated that NH 2 and HCNO radicals are the major inter‐compounds which can reduce NO at bias combustion conditions. Copyright © 2009 Curtin University of Technology and John Wiley & Sons, Ltd.