A permeation tbeo~, of insitu coal gasificationis developed, and a mathematical model is derived for the process, Predicted gas compositions, gas fiow rates, and temperature pro/iles are in good agreement with /ieid test data, For example, experimental gas compositions deviate no more than 3 to 4 molYa from calculated values, On the average, agreement is much better. The major purpose oi the permeation theory is to provide a basis for quantitative understanding of in-situ coal gasification and to lead to important ,yeneral conclusions concerning the nature of !be process. The well instrumented Hanna 2, Phase 2 test was essential in providing needed information to coniirm the theoretical conclusions. This test was conducted near Hanna, WY, during 1976 and was the best instrumented and most succ~ss~ul /ield test ever conducted up to that time.

No abstract

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LEGALDISCLAIMER Thisreportwas preparedas 3n accountof worksponsored by an agencyof the UnitedStatesGovernment.Neitharthe UnitedStatesGovernment norany agencythereof,nor anyof theiremployees, norany of theircontractors, subcontractors or theiremployees, makesanywarranty,expressor implied, or assumesany legalliabilityor responsibility for the accuracy, completeness, or anythirdparty'suseor the results of suchuseof any information, apparatus, product, or process disclosed, or represents that itsuse wouldnotinfringe privatelyownedrights. Referencehereinto anyspecific commercial product, process, or serviceby tradename, trademark, manufacturer, or otherwise, doesnotnecessarily constitute or implyits endorsement, recommendation, or favoringbythe UnitedStates Government or anyagency thereofor its contractors or subcontractors. Theviewsand opinions of authorsexpressed hereindo not necessarily state or reflectthoseof the UnitedStatesGovernment or any agencythereof. Thisreporthasbeenreproduced fromthe bestavailablecopy. Availablein papercopyandmicrofiche.

Ij^ PREFACEThis report is pajrt of a seven-volume series on the Hanna, Wyoming, underground coal gasification field tests. Volume 1 is a summary of the project and each of Volumes 2 through 6 describes a particular test. Volume 7 is a compilation of all the data for the tests in Volumes 2 through 6.