2Robert B Finkelman. Mode of occurrence of potentially hazardous el- ements in coal:levels of confidence [ J ]. Fuel Processing Technolo- gy, 1994,39:21-34.
3Kevin C Galbreath, Donald L Toman, Christopher J Zygarlicke, et al. Trace element partitioning and transformations during combustion of bituminous and subbituminous U. S. coals in a 7 kW combustion sys- tem [ J ]. Energy & Fuel,2000,14 : 1265-1279.
4Rong Yan ,Daniel Gauthier, Gilles Flamant. Volatility and chemistry of trace elements in a coal combustor [ J ]. Fuel, 2001,80 : 2217 - 2226.
5Koichi Matsuoka, Aki Abe, Yohsuke Suzuki, et al. Effectiveness of hydrothermal treatment of coal with lime for removal of trace ele- ments [ J ]. Energy Fuel, 2002,16 ( 4 ) : 920-924.
