A study of Oxy-fuel Co-Combustion of Palm Empty Fruit Bunch with Australian coal

• Main Authors: Cheng-TsuPeng, 彭承祖
• Other Authors: Yei-Chin Chao
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/ykhfr4

碩士 === 國立成功大學 === 航空太空工程學系 === 106 === Co-combustion of PEFB and coal can make up for the adverse effects of high pollutant and high ash content of coal. Oxy-fuel combustion and CO2 capture from flue gases is a near-zero emission technology that can be adapted to both new and existing pulverized coal-fired power stations. In this study, the combustion characteristics of PEFB, Australian coal and their blend with various blending ratios were studied. The results indicated that replacing N2 by CO2 in the combustion atmosphere with 21% of O2 caused increase in the ignition temperature and burnout temperature. When the O2 concentration was increased to 30%, the ignition temperature and burnout temperature were lower than in the air case. A slight decrease in the ignition temperature and a significant reduction in the burnout temperature was observed after the addition of PEFB, this trend became more obvious as the blending ratios were increased. The emissions of NOx and SO2 during oxy-fuel combustion were lower than under air-firing conditions. The reaction rate constant of combustion process calculated by Coats-Redfern method for 21%O2/79%CO2 are slightly lower than for 21%O2/79%N2. There was a synergistic effect for the co-combustion of PEFB and Australian coal, especially in the char oxidation stage.