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Landfill gas treatment system

  • US 5,451,249 A
  • Filed: 06/14/1994
  • Issued: 09/19/1995
  • Est. Priority Date: 06/14/1994
  • Status: Expired due to Term
First Claim
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1. A method for treating a raw landfill gas stream to form a treated methane-based gas which may be used in lieu of natural gas as a fuel gas, said method comprising the steps of:

  • a) passing said landfill gas stream through a hydrogen sulfide adsorption bed to reduce hydrogen sulfide content of the raw landfill gas stream to about five ppm or less;

    b) cooling a resultant gas stream emanating from said adsorption bed to a temperature which is operable to condense water vapor and heavier hydrocarbon fractions in the resultant gas stream;

    c) adsorbing condensed water vapor and heavier hydrocarbon fractions from the resultant gas stream to form a dried gas stream;

    d) removing hydrocarbon contaminants from the dried gas stream by passing the dried gas stream through an activated carbon bed; and

    e) removing contaminant particules from the dried gas stream.

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