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- W100208521 abstract "A model describing cavity growth and gas production during underground coal gasification (UCG) has been developed. It is applicable to UCG of shrinking coals in which oxidant injection is maintained at a fixed point low in the coal seam. It is based on a few fundamental assumptions; namely that the cavity is axisymmetric about the injection point, all resistance to injected gas flow is through ash and overburden rubble that accumulates on the cavity floor, thermal radiation dominates in the well-mixed void space, and the coal and overburden spall or rubblize on a small scale du to parameterized thermal effects. The model calculates water influx from the coal aquifer, flow dispersion trough the rubble piles, radiant and convective heat transfer, gas/solid, gas-phase and simple pyrolysis reactions to calculate, through mass and energy balances, recession rates of cavity surfaces and generation rates of major product species. Model predictions are shown to compare very well with process and geometrical data from two UCG field tests, and the model is used to simulate UCG Of other coals of UCG interest." @default.
- W100208521 created "2016-06-24" @default.
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- W100208521 date "1989-01-01" @default.
- W100208521 modified "2023-09-24" @default.
- W100208521 title "A model for cavity growth and resource recovery during underground coal gasification" @default.
- W100208521 hasPublicationYear "1989" @default.
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