| 摘要 |
The invention relates to a method for determining the gas quality of a sample gas having the main components H2, CO, CO2, N2, CH4, proceeding from a spectrum of the sample gas determined by means of infrared-spectroscopy measurement methods, from which the mole fractions of the sample gas are determined by means of correlative methods, and converted into characteristic variables of the gas quality. In this connection, the optical absorption of carbon monoxide CO, carbon dioxide CO2, methane CH4 and the heat conductivityλof the sample gas are measured, the mole fraction xCO is determined from the absorption of the CO, the mole fraction xCO2 is determined from the absorption of the CO2, and the mole fraction xCH4 is determined from the absorption of the CH4, the optically not detected mole fractions of nitrogen xN2 and of hydrogen xH2 are determined from the mole fractions xCO, xCO2 xCH4 and the heat conductivityλ, by means of a correlation equationλ=F(xH2,xCO,xCO2,xN2,xCH4), whereupon characteristic parameters of the sample gas are calculated from the mole fractions obtained in this manner.
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