SIMULTANEOUS REDUCTION OF SOX AND FINE ASH PARTICLES DURING COMBUSTION OF COALS ADDED WITH ADDITIVES
SO2 emission from coal combustion is the important problem in many countries. This paper aims to evaluate the possibility of simultaneous reduction of SOx and fine ash particles during combustion of coal added with inorganic Ca-containing sorbent and organic Mg-containing sorbent in the fluidized bed conditions. Compared to addition of limestone particles to coal, the use of these sorbents produces the ultra-fine active oxides in the coal/char at higher temperature. The formed ultra-fine active oxides provide larger reaction surface area for the S and chemical sorbents, and, therefore, the high desulfurization efficiency will be expected in the fluidized bed coal combustion. In addition, the addition of chemical additives can affect the mineral transformation process during combustion. The results indicate that at certain temperature, higher sulfur removal efficiency can be obtained for selected Ca- and Mg-rich sorbents than those of natural limestone under fluidized bed combustion conditions. It is mainly due to the fine dispersion of Ca and Mg in impregnated coal so that a good is obtained between calcium and sulfur-containing coal particles. The addition of additives has a visible impact on the particle size distribution and chemical composition of the PM, wherein, it improves the degree of coalescence of sub-micron and fine mineral particles, which reduces PM2.5 emissions. For the selected coal, the effect on the reduction of PM2.5 emissions strongly depends on the addition and the type of sorbent being used.
chemical additives FBC reduction of PM2.5 De-SOz
Yoshihiko Ninomiya Shuyin Xu Qunying Wang Yi Cheng Isao Awaya
Department of Applied Chemistry, Chubu University1200 Matsumoto-cho,Kasugai, Aichi 487-8501, Japan Research Laboratory, Taihokohzai Co.,Ltd.9 Kirihara-cho, Fujisawa, Kanagawa, 252-0811, Japan
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
960-965
2009-05-18（万方平台首次上网日期，不代表论文的发表时间）