Method for increasing the calorific value of gas produced by the in situ combustion of coal

Shuck, Lowell Z

Title: Method for increasing the calorific value of gas produced by the in situ combustion of coal

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Abstract

The present invention relates to the production of relatively high Btu gas by the in situ combustion of subterranean coal. The coal bed is penetrated with a horizontally-extending borehole and combustion is initiated in the coal bed contiguous to the borehole. The absolute pressure within the resulting combustion zone is then regulated at a desired value near the pore pressure within the coal bed so that selected quantities of water naturally present in the coal will flow into the combustion zone to effect a hydrogen and carbon monoxide-producing steam-carbon reaction with the hot carbon in the combustion zone for increasing the calorific value of the product gas.

Inventors:

Shuck, Lowell Z ^[1]

Morgantown, WV

Issue Date:: 1978-01-01

Research Org.:: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)

OSTI Identifier:: 863116

Patent Number(s):: 4095650

Assignee:: United States of America as represented by United States (Washington, DC)

Patent Classifications (CPCs):: E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

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E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING
E21B43/243 - Combustion in situ

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S48/06 - Underground gasification of coal

E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING
E21B43/305 - {comprising at least one inclined or horizontal well}

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Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: method; increasing; calorific; value; gas; produced; situ; combustion; coal; relates; production; relatively; btu; subterranean; bed; penetrated; horizontally-extending; borehole; initiated; contiguous; absolute; pressure; resulting; zone; regulated; desired; near; pore; selected; quantities; water; naturally; flow; effect; hydrogen; carbon; monoxide-producing; steam-carbon; reaction; hot; product; situ combustion; btu gas; calorific value; coal bed; product gas; combustion zone; carbon monoxide; gas produced; steam-carbon reaction; absolute pressure; subterranean coal; pore pressure; desired value; water natural; hot carbon; /166/48/

Citation Formats


                    Shuck, Lowell Z. Method for increasing the calorific value of gas produced by the in situ combustion of coal.  United States: N. p., 1978. 
        Web.

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                    Shuck, Lowell Z. Method for increasing the calorific value of gas produced by the in situ combustion of coal.  United States.

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                    Shuck, Lowell Z. Sun .  
        "Method for increasing the calorific value of gas produced by the in situ combustion of coal".  United States.  https://www.osti.gov/servlets/purl/863116.

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@article{osti_863116,

  title        = {Method for increasing the calorific value of gas produced by the in situ combustion of coal},

  author       = {Shuck, Lowell Z},

  abstractNote = {The present invention relates to the production of relatively high Btu gas by the in situ combustion of subterranean coal. The coal bed is penetrated with a horizontally-extending borehole and combustion is initiated in the coal bed contiguous to the borehole. The absolute pressure within the resulting combustion zone is then regulated at a desired value near the pore pressure within the coal bed so that selected quantities of water naturally present in the coal will flow into the combustion zone to effect a hydrogen and carbon monoxide-producing steam-carbon reaction with the hot carbon in the combustion zone for increasing the calorific value of the product gas.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1978},

  month        = {1}

}

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