000			01989nab a2200169 4500
005			20260520000815.0
008			260224s2009 xxu
245	0	0	_aModeling of contaminant transport in underground coal gasification
260			_a _b _cene. 2009
270			_a15/04/2009 ; 15/04/2009
300			_a8 p. ; 193-201
520			_aTranscripción del resúmen publicado por el autor: In order to study and discuss the impact of contaminants produced from underground coal gasification on groundwater, a coupled seepage-thermodynamics-transport model for underground gasification was developed on the basis of mass and energy conservation and pollutant-transport mechanisms, the mathematical model was solved by the upstream weighted multisell balance method, and the model was calibrated and verified against the experimental site data. The experiment showed that because of the effects of temperature on the surrounding rock of the gasification panel the measured pore-water-pressure was higher than the simulated one; except for in the high temperature zone where the simulation errors of temperature, pore water pressure, and contaminant concentration were relatively high, the simulation values of the overall gasification panel were well fitted with the measured values. As the gasification experiment progressed, the influence range of temperature field expanded, the gradient of groundwater pressure decreased, and the migration velocity of pollutant increased. Eleven months and twenty months after the test, the differences between maximum and minimum water pressure were 2.4 and 1.8 MPa, respectively, and the migration velocities of contaminants were 0.24-0.38 m/d and 0.27-0.46 m/d, respectively. It was concluded that the numerical simulation of the transport process for pollutants from underground coal gasification was valid.
773	0		_tEnergy & fuels _g23
942			_cARTICULO
100	1		_aYang, Lanhe _940867
999			_c169556 _d169556