0104760 - UCHP-M 20040011 RIV GB eng J - Journal Article
Svoboda, Karel - Pohořelý, Michael
Influence of Operating Conditions and Coal Properties on NOx and N2O Emissions in Pressurized Fluidized Bed Combustion of Subbituminous Coals.
[Vliv pracovních podmínek a vlastností uhlí na emise NOx a N2O ze spalování subbitumenózních uhlí v tlakové fluidní vrstvě.]
Fuel. Roč. 83, 7-8 (2004), s. 1095-1103. ISSN 0016-2361. E-ISSN 1873-7153
R&D Projects: GA AV ČR IAA4072801
Institutional research plan: CEZ:AV0Z4072921
Keywords : NOx and N2O emissions * combustion
Subject RIV: CI - Industrial Chemistry, Chemical Engineering
Impact factor: 1.368, year: 2004

Our experimental study is aimed at finding effects of operating conditions in Pressurized Fluidized Bed Combustion (PFBC) of subbituminous coals differing in ash content/composition and in particle size distribution on nitrogen oxide ( NOx + N2O) emissions. The experiments have been performed on a smaller laboratory apparatus with ID = 8 cm. The effects of operating pressure (0.1 - 1 MPa), temperature of the fluidized bed ( 800 - 900 oC), freeboard temperature and oxygen concentration (3 - 10 vil. %) in flue gas on the nitrogen oxides emissions is relatively complex, coupled with temperature of burning coal particles. The NOx emissions decrease with increasing pressure, the N2O emissions can exhibite a maximum at pressure 0.2 - 0.5 MPa or can be practically constant. At higher temperatures (900 oC) the N2O emissions are small/negligible.

Experimenty byly realizovány v malém laboratorním aparátu o průměru 10 cm. Emise NOx klesají s rostoucím tlakem, emise N2O vykazují maximum při tlacích 0,2 – 0,5 MPa.
Permanent Link: http://hdl.handle.net/11104/0012026