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Abstrakty
The evolution of NO during air-staged combustion of pulverized lignite has been studied with an electrically-heated drop-tube reactor, in wide temperature and stoichiometric ratio range. In order to investigate the effect of mineral matter in lignite on NO formation, raw, demineralized and Ca-loaded lignite samples have been used. The obtained results showed that some active components in mineral matter promote NO reduction during air staging under certain combustion conditions. The maximum benefits of the catalysts presence were observed at low stoichiometric ratio region and combustion temperatures where the emission level of NO from raw lignite was apparently lower in comparison with HCl washed lignite. A similar effect has been also found for individual calcium catalyst introduced into demineralized lignite by impregnation.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
5--15
Opis fizyczny
Bibliogr. 10 poz., rys., tab.
Twórcy
autor
autor
- Institute of Heat Engineering and Fluid Mechanics, Wrocław University of Technology, W. Wyspiańskiego 27, 50-370 Wrocław, Poland, wojciech.zacharczuk@pwr.wroc.pl
Bibliografia
- [1] Spliethoff H, Greul U, Rudiger H, Hein K, Basic effects on NOx emissions in air staging and reburning at a bench-scale test facility, Fuel, 75, (1996), pp.560-564.
- [2] Lyngfelt A, Amand L, Leckner B, Reversed air staging - a method for reduction of N2O emissions from fluidized bed combustion of coal, Fuel, 77, (1998), pp.953-959.
- [3] Kopsel RFW, Halang S., Catalytic influence of ash elements on NOx formation in char combustion under fluidized bed conditions, Fuel, 76, (1997), pp.345-351.
- [4] Matsuoka K, Rosyadi E, Tomita A., Mode of occurrence of calcium in various coals, Fuel, 81, (2002), pp.1433-1438.
- [5] Wu Z, Sugimotob Y, Kawashima H, Effect of demineralization and catalyst addition on N2 formation during coal pyrolysis and on char gasification, Fuel, 82, (2003), pp.2057-2064.
- [6] Kordylewski W, Zacharczuk W, Hardy T, Kaczmarczyk J., The effect of the calcium in lignite on its effectiveness as a reburn fuel, Fuel, 84, (2005), pp.1110-1115.
- [7] Zhao Z, Li W, Li B., Catalytic reduction of NO by coal chars loaded with Ca and Fe in various atmospheres, Fuel, 81, (2002), pp.1559-l564.
- [8] Zevenhoven R, Hupa M., The reactivity of chars from coal, peat and wood towards NO, with and without CO, Fuel, 77, (1998), pp.1169-1176.
- [9] Tsubouchi N, Ohtsuka Y, Formation of N2 during pyrolysis of Ca-loaded coals, Fuel, 81, (2002), pp.l4231431.
- [10] Tsubouchi N, Ohshima Y, Xu C, Ohtsuka Y, Enhancement of N2 formation from nitrogen in carbon and coal by calcium, Energy&Fuels, 15, (2001), pp.158-162.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BWM4-0040-0013