Cellular Premixed Flames of Synthetic Biogas Composition Effects on Flat Burner
To compare the effects of biogas compositions, cellular premixed flames of synthetic biogas on flat burner was investigated. As the variation of main composition of biogas such as methane (CH4) and carbon dioxide (CO2), the biogas produced from agricultural waste (54.9 : 45.1), food waste (73.4 : 26.6) and cow dung (85.1 : 14.9) were used to investigate for this study. Moreover, the lean combustion system was experimented on flat burner to reduce the greenhouse gases. The variation of equivalence ratio between Φ = 0.65 - 1.00 and firing rate with 45 L/min of mixture flow rates were studied. The results showed the cellular flame from agricultural waste, food waste and cow dung were found between Φ = 0.75 - 1.00, Φ = 0.70 - 0.90 and Φ = 0.65 - 0.80, respectively. In addition, the blown off flames were also observed at Φ < 0.75, Φ < 0.70 and Φ < 0.65 from agricultural waste, food waste and cow dung compositions, respectively. The results showed the variation of biogas compositions, equivalence ratio and firing rate affected to cellular flames owing to the intrinsic instability. Moreover, it was concluded that small cell size, higher light emission and narrower unstable range and wider flame range obtained in the combustion of biogas produced from cow dung composition, was more stable compared to biogas from agricultural waste and food waste compositions.
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