Measuring multicomponent constituency of gas emission flow

An on-line gas measurement apparatus, comprising:

• (a) dilution tube means for sequestering a sample flow from a gas emission flow, said sample flow being diluted to lower its dew point to below room temperature and changed in either temperature and/or pressure to be substantially the same in temperature and pressure as that of gases used to create reference transmission frequency spectral data;
• (b) FTIR apparatus effective to Produce electromagnetic signals with discernible amplitude variations resulting from irradiating said sample flow;
• (c) computer means for (i) detecting and collecting said signals at a sufficiently high rate to substantially completely distinguish between adjacent spectral amplitudes without mutual spectral interference, and (ii) analyzing said signals in accordance with Beer's Law to create reformed background-corrected data and applying reference transmission frequency spectral data to said reformed data for each suspected gas component to give a linear quantitative measure of the presence of each and every suspected gas component in said gas emission flow.

An on-line gas measurement apparatus, comprising:

• (a) dilution tube means for sequestering a sample flow from a gas emission flow, the sample flow being filtered to substantially eliminate solid or liquid particles, diluted to lower its dew point to below room temperature, and changed in either temperature and/or pressure to be substantially the same in temperature and pressure as that of gases used to create reference transmission frequency spectral data;
• (b) FTIR apparatus effective to produce electromagnetic signals with discernible amplitude variations resulting from irradiating said sample flow;
• (c) computer means for (i) detecting and collecting said signals at a sufficiently high rate to substantially completely distinguish between adjacent spectral amplitudes without mutual spectral interference, and (ii) analyzing said signals in accordance with Beer's Law to create reformed background-corrected data and applying reference transmission frequency spectral data to said reformed data for each suspected gas component to give a linear quantitative measure of the presence of each and every suspected gas component in said gas emission flow.