000			02335nab a2200205 4500
005			20260520000926.0
008			260224s2011 xxu
245	0	0	_aFundamental study on decomposition characteristics of mercury compounds over solid powder by temperature-programmed decomposition desorption mass spectrometry
260			_a _b _cene./feb. 2011
270			_a01/04/2011 ; 01/04/2011
300			_a10 p. ; 144-153
520			_aTranscripción del resumen del autor. Stabilities and/or decomposition characteristics of mercury compounds are important for the design of solid sorbents for mercury vapor removal from coal-derived flue gas and fuel gas. However, available data on the stability and decomposition behavior of mercury compounds are inadequate. The stability and/or decomposition behavior of mercury compounds, such as HgS (metacinnabar and cinnabar), HgO, HgSO4, HgCl2, and Hg2Cl2, were investigated by the temperature-programmed decomposition and desorption technique using a mass spectrometer (TPDD-mass) method. The effects of solid diluents, such as quartz, SiC, Al2O3, TiO2, or activated carbon (AC), on the decomposition characteristics were also studied by the TPDD-mass method. In particular, the stability and reactivity of mercury chloride (HgCl2) in coal combustion flue gas and coal-derived fuel gas conditions were examined. The following results were obtained: (1) the order of the main peak temperature of mercury evolution from the decomposition of the mercury compound diluted with quartz sand in He flow was as follows: HgS (metacinnabar) = HgO < HgS (cinnabar) < HgSO4; (2) HgSO4 was hydrolyzed with H2O; (3) HgO was reduced by SO2 in the presence of H2O and O2; (4) HgCl2 and Hg2Cl2 over SiO2 were more easily decomposed than the other mercury compounds; (5) Among the diluents of HgCl2, SiO2, SiC, Al2O3, TiO2, and AC, HgCl2 was most easily decomposed to Hg0 over SiO2; (6) AC as a diluent apparently stabilizes HgCl2; and (7) HgCl2 gas could be converted to Hg0 over quartz wool, Pyrex wool, ceramic (SiO2-Al2O3) wool, carbon fiber, and AC at high temperatures (>ca. 200 °C).
581			_a1
773	0		_tEnergy & fuels _g25
942			_cARTICULO
100	1		_aWu, Shengji _936837
100	1		_aNagano, Saori _945010
100	1		_aOzaki, Masaki _945011
999			_c174386 _d174386