THE RELATIONSHIP BETWEEN MERCURY COMPOUNDS AND MINERAL MATTER IN ALBERTA COAL
A vast amount of coal combustion consumption has emitted a host of mercury and/or mercury compounds into air. The technical community has become increasingly concerned with mercury emission control from combustion flue gas. In order to control mercury emission from combustion flue gas, dry method for coal cleaning and thermal upgrading for subbituminous coal are being considered as one of mercury emission control options. In this study, Alberta subbituminous coal was tested for to reveal the effect of mercury removal by air dense medium fluidized bed (ADMFB) separation method and the thermal upgrading (Xu et al.,2004). Findings were the bottom 28％ of the coal cleaned by ADMFB separator contained over 46％ of mercury and contain over 57％ of ash. On the other hands, mineral matters without Al and Si tend to decrease from A to D sample or there was no relationship with them. Even D sample contained largest weight ratio of mercury and the upgrading temperature was 750℃, Ag, Cu, Fe, Na, Mg, K, Zn and Ca concentration were below under the detection limit (about 0.1ppm) of AAS analysis. There was possibility that mercury in Alberta subbituminous coal related with a compound contained Si and Al such as Kaolinite(Al2Si2O5) and so on. It was revealed that fluoride concentration was not changed if the mercury was released by upgrading. Therefore, if the fluoride was consisted mercury compounds in coal, and the sample was evaporated and/or decomposed by heating temperature, fluoride was not release to gas phase with mercury and remained in coal.
Subbituminous coal Alberta mineral matter
Wataru Minami Zhenghe XU Hee Joon Kim
Department of Ecological Engineering, Toyohashi University of Technology, Toyohashi, Aichi, Japan Department of Chemical and Materials Engineering University of Alberta, Edmonton, Alberta, Canada
国际会议
第六届煤燃烧国际会议(The 6th International Symposium on Coal Combustion)
武汉
英文
810-816
2007-12-01（万方平台首次上网日期，不代表论文的发表时间）