In situ gasification process for producing product gas enriched in carbon monoxide and hydrogen [electronic resource].

Published:: Pittsburgh, Pa. ; Burgh, Pa. : National Energy Technology Laboratory (U.S.), 1978.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators:: National Energy Technology Laboratory (U.S.) and United States. Department of Energy. Office of Scientific and Technical Information

Access Online

www.osti.gov

Availability

Finding items...

Restrictions on Access:

Free-to-read Unrestricted online access

Summary:

The present invention is directed to an in situ coal gasification process wherein the combustion zone within the underground coal bed is fed with air at increasing pressure to increase pressure and temperature in the combustion zone for forcing product gases and water naturally present in the coal bed into the coal bed surrounding the combustion zone. No outflow of combustion products occurs during the build-up of pressure and temperature in the combustion zone. After the coal bed reaches a temperature of about 2000.degree. F and a pressure in the range of about 100-200 psi above pore pressure the airflow is terminated and the outflow of the combustion products from the combustion zone is initiated. The CO.sub.2 containing gaseous products and the water bleed back into the combustion zone to react endothermically with the hot carbon of the combustion zone to produce a burnable gas with a relatively high hydrogen and carbon monoxide content. About 11 to 29 percent of the gas recovered from the combustion zone is carbon monoxide which is considerably better than the 4 to 10 percent carbon monoxide obtained by employing previously known coal gasification techniques.

Report Numbers:

E 1.99:us 4122897
us 4122897

Other Subject(s):

Situ Gasification Process Producing Product Gas Enriched Carbon Monoxide Hydrogen Directed Situ Coal Gasification Process Combustion Zone Underground Coal Bed Fed Air Increasing Pressure Increase Pressure Temperature Combustion Zone Forcing Product Gases Water Naturally Coal Bed Coal Bed Surrounding Combustion Zone Outflow Combustion Products Occurs Build-Up Pressure Temperature Combustion Zone Coal Bed Reaches Temperature 2000 Degree Pressure Range 100-200 Psi Pore Pressure Airflow Terminated Outflow Combustion Products Combustion Zone Initiated Containing Gaseous Products Water Bleed Combustion Zone React Endothermically Hot Carbon Combustion Zone Produce Burnable Gas Relatively Hydrogen Carbon Monoxide Content 11 29 Percent Gas Recovered Combustion Zone Carbon Monoxide Considerably 10 Percent Carbon Monoxide Obtained Employing Previously Coal Gasification Techniques Percent Carbon Monoxide Content Underground Coal Situ Gasification Coal Bed Coal Bed Coal Bed Coal Bed Product Gases Product Gas Product Gas Combustion Products Combustion Products Combustion Zone Combustion Zone Combustion Zone Combustion Zone Combustion Zone Combustion Zone Combustion Zone Combustion Zone Carbon Monoxide Carbon Monoxide Carbon Monoxide Carbon Monoxide Coal Gasification Coal Gasification Gaseous Product Containing Gas Gasification Process Gasification Process Coal Gas Coal Gas Gaseous Products Combustion Product Combustion Product Pore Pressure Situ Coal Water Natural Hot Carbon Oxide Content Situ Gas Producing Product Containing Gaseous

Note:

Published through SciTech Connect.
01/01/1978.
"us 4122897"
Bissett, Larry A.; Capp, John P.

View MARC record | catkey: 14098169