INVESTIGATION OF COAL FUELED CHEMICAL LOOPING COMBUSTION USING Fe3O4 AS OXYGEN CARRIER
Chemical-looping combustion (CLC) is a novel combustion technique with CO2 separation. Magnetite (Fe3O4) was selected as the oxygen carrier and Shenhua coal (Inner Mongolia, China) as the fuel for this study. The influences of operation temperatures, and coal to Fe3O4 mass ratios on the reduction characteristics of the oxygen carrier were investigated using an atmosphere TGA. The sample, comprised of 2.25mg coal and 12.75mg Fe3O4, was heated to 1000℃ . Experimental results show that the reaction between the coal volatile and Fe3O4 began at 700℃ while the reaction between the coal char and Fe3O4 occurred at 800℃ and reached a peak at 900℃ . Fe3O4 was fully reduced into FeO, while some FeO was further reduced to Fe. As the operation temperature rises, the reduction conversion rate increases. At the temperatures of 850℃ , 900℃ , and 950℃ , the reduction conversion rates were 37.1％, 46.5％, and 54.1％ respectively. When the mass ratios of coal to Fe3O4 were 5/95, 10/90, 15/85, and 20/80, the reduction conversion rates were 29.5％, 40.8％, 46.5％, and 46.6％ respectively. With the increase of coal to Fe3O4 mass ratio, the conversion rate increases first and then changes no more. There exists an optimal coal to Fe3O4 mass ratio.
chemical-looping combustion CO2 separation magnetite coal
Wenguo Xiang Xiaoyan Sun Sha Wang Wendong Tian Xiang Xu Yanji Xu Yunhan Xiao
School of Energy and Environment, Southeast University, Nanjing, 210096, China Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, 100080, China
国际会议
第20届国际流化床燃烧会议(20th International Conference on Fluidized Bed Combustion)
西安
英文
527-532
2009-05-18（万方平台首次上网日期，不代表论文的发表时间）