Abstract
Proper and systematic control of the odorization process is a basic condition for ensuring public safety in the distribution and use of gaseous fuels and for the continuity of the process. Maintaining a constant level of gas odorization requires gas network operators to constantly monitor the odorizing process. The control is carried out, among others by measuring the concentration of odorant in the gas. This is an important and inseparable element of controlling the degree of odorization of gaseous fuels, aimed at controlling the operation of odorizing devices by verifying the dose of odorizing agent or controlling the composition of gaseous fuel at any point of the gas distribution network. The correctness of uninterrupted control of the degree of gas odorization depends on the availability and quality of measuring instruments. The only process chromatographic analyzer intended for continuous measurement of the odorant concentration in gaseous fuels used on a national scale is the ANAT-M analyzer. Since this device works under process conditions, not supervised by an analyst, it is extremely important to recognize the restrictions on the correctness of its indications resulting from the presence of certain compounds in the gas. The article presents the analysis of observations and results of analyzes regarding the impact of selected sulfur compounds and other components of high-methane natural gas on the response of the THT detector currently used in ANAT-M analyzers. The significance of this influence for the quality of obtained THT concentration measurement results was determined. Gases containing sulfur compounds that may be present in the network gas, such as hydrogen sulfide, methyl mercaptan, dimethyl sulfide, as well as network gas containing the addition of LNG and biogas gases were tested. The obtained test results were analyzed in terms of determining the magnitude of the impact of the tested parameters on the precision of measurements performed with the ANAT-M analyzer.
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