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Title: Ventilation of porous media

Methods are presented for distributing gases throughout the interstices of porous materials and removing volatile substances from the interstices of porous materials. Continuous oscillation of pressures and flows results in increased penetration of the interstices by flowing gases and increased transport of gaseous components out of the interstices. The invention is particularly useful in soil vapor extraction. 10 figures.
Inventors:
Issue Date:
OSTI Identifier:
5177290
Assignee:
Dept. of Energy, Washington, DC () PTO; EDB-94-065439
Patent Number(s):
US 5288169; A
Application Number:
PPN: US 7-829346
Contract Number:
W-7405-ENG-36
Resource Relation:
Patent File Date: 31 Jan 1992
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; GASES; ENVIRONMENTAL TRANSPORT; POROUS MATERIALS; VENTILATION; SOILS; DECONTAMINATION; VOLATILE MATTER; EXTRACTION; CLEANING; FLUIDS; MASS TRANSFER; MATERIALS; MATTER; SEPARATION PROCESSES; 540220* - Environment, Terrestrial- Chemicals Monitoring & Transport- (1990-)