LLL in situ coal gasification program. Quarterly progress report, April--June 1978. [31 references and 19 abstracts of other reports]

Technical Report · Sun Oct 01 04:00:00 EDT 1978

OSTI ID:6356295

Cena, R J; Minkel, K J ^[1]

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1. eds.

The Hoe Creek No. 2 and No. 3 field gasification programs were reviewed. Progress in in situ modeling efforts is reported, along with results from in situ laboratory experiments and environmental studies. A Hoe Creek No. 2 postburn site examination confirmed that the 2-in. injection line remained intact throughout the experiment and that the A and B wellhead casings were burned off at or above the top of the coal seam. Post-experiment coring plans will attempt to measure the vertical roof collapse in Hoe Creek No. 2 and the extent to which Felix No. 1 coal participated in the gasification. In situ modeling studies have continued; a mechanistic theory for the drying of porous media is discussed with direct applicability to overburden drying and roof collapse during in situ gasification. Subsidence modeling employing this theory has indicated large vertical roof collapse for Hoe Creek No. 2 with a stable overburden above the collapse and very small surface deformations. This prediction agrees well with Hoe Creek No. 2 field results. Tracer studies performed during Hoe Creek No. 2 were analyzed and indicate that a highly dispersive flow pattern may exist underground during gasification in agreement with the two-dimensional simulator model. Hanna II field results with a more complete material balance are presented. Large char zones may exist underground following gasification of Hanna coal. Development of our in situ processing laboratory has continued with integration of the field computer and analytical instrumentation into the facility. Laboratory measurements of pollutant transport and field results from ground-water quality studies at Hoe Creek No. 1 are presented. Both studies indicate strong absorption of phenolic material by the native coal.

• Research Organization: California Univ., Livermore (USA). Lawrence Livermore Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6356295
• Report Number(s): UCRL-50026-78-2
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
ADSORPTION
AROMATICS
CARBONACEOUS MATERIALS
COAL
COAL GASIFICATION
DRYING
ENERGY SOURCES
ENVIRONMENTAL TRANSPORT
FOSSIL FUELS
FUELS
GASIFICATION
GROUND SUBSIDENCE
HYDROLOGY
HYDROXY COMPOUNDS
IN-SITU GASIFICATION
IN-SITU PROCESSING
ISOTOPE APPLICATIONS
MASS TRANSFER
MATERIAL BALANCE
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
ORGANIC COMPOUNDS
PHENOLS
PROCESSING
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
TRACER TECHNIQUES