Akademik Veri Yönetim Sistemi
CANADIAN JOURNAL OF CHEMICAL ENGINEERING, cilt.102, sa.5, ss.1726-1742, 2024 (SCI-Expanded)
Fuels consisting of high hydrogen concentration can be consumed under colourless distributed combustion (CDC) to suppress flashback tendency in premixed conditions. Higher NOX challenges can also be overcome through CDC. For those purposes, coke oven gas was consumed under CDC within the scope of this study. To achieve CDC, N-2 or CO2 diluents were introduced into the oxidizer so that oxygen concentration in the oxidizer would be decreased from 21% O-2 to its lean blow-off limits. Excess air ratios were determined as lambda = 1.2 and lambda = 1.5 along with a thermal power of 10 kW under premixed conditions. A commercial computational fluid dynamics code was used to predict temperature distribution and NOX, CO, and CO2 emissions. 162-step reactions created with GRI-Mech 3.0 chemical kinetics was integrated to the eddy dissipation concept combustion model. The temperature and NOX profiles predicted were compared with the experimental results. Consistency was achieved at similar to 95% for temperature profiles, and almost 100% for NOX profiles between the measured and the predicted ones. According to the results, it is concluded that a more homogeneous temperature distribution with the similar to 21% decrease in the maximum temperature was observed, and there was about 96% decrease in NOX level. It was also demonstrated that using CO2 as a diluent is more effective in terms of temperature distribution over the combustor and NOX reduction, while dilution with N2 is more effective in terms about 70% in decrease on CO.