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Method And Apparatus For Siloxane Measurements In A Biogas

  • US 20130193325A1
  • Filed: 01/17/2013
  • Published: 08/01/2013
  • Est. Priority Date: 09/30/2005
  • Status: Active Grant
First Claim
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1. A method for monitoring one or more silicon-containing compounds present in a biogas, the method comprising:

  • providing a non-absorptive gas to a sample cell, the non-absorptive gas having substantially no infrared absorptions in a specified wavelength range of interest;

    obtaining a first spectral measurement from the sample cell;

    providing a biogas to the sample cell;

    obtaining a second spectral measurement from the sample cell;

    generating a first absorption spectrum based on a ratio of the first spectral measurement and the second spectral measurement;

    generating at least one surrogate absorption spectrum based on, at least, individual absorption spectrum for each of a subset of one or more silicon-containing compounds selected from a larger set of known silicon-containing compounds with known concentrations; and

    calculating a total concentration of the one or more silicon-containing compounds in the biogas based on the first absorption spectrum and the at least one surrogate absorption spectrum.

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