Analysis of hydrogen sulfide in urea carbon dioxide feed gas
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The hydrogen sulfide analysis results of the urea feed gas are not consistent with the hydrogen sulfide results in the mixed gas from the decarbonization system. The cooler is passed between the two sampling points. Why is the hydrogen sulfide result on the urea side higher than that on the decarbonization side?
This post was last edited by qugd on 2017-2-3 09:13. First, confirm whether there are any problems with the analysis method? If there is no problem with the analysis method and the analysis results are credible (the analysis data itself), then look for the reasons from the following points: 1. The sampling process, including sampling containers, selection of sampling points, and representativeness during sampling 2. The sample transfer process is caused by leakage (including air leakage into the sample) and contamination, including contamination of the previous sample 3. The analyst's own operating process and proficiency in using instruments and equipment, and whether the analysis operation specifications are 4. Fluctuations in process conditions, whether the sample contains moisture 5. Changes in other sample components in the analysis data
This post was last edited by thefirstboy on 2017-2-3 11:33. The section chief of the quality inspection department of our factory personally took the samples and eliminated all the effects of the gas flow meters, spectrophotometers, desalted water, and chemicals used in the two analysis rooms. Why is it that the same sample placed in this analysis room has a high result, but the result of the other one is low, and the difference is much worse? The length of time between samples of the same gas has a great influence on the hydrogen sulfide results. It is known that the amount of moisture carried by each sampling point is different.
If the same gas sample is analyzed at different time points, will it affect the results of hydrogen sulfide analysis?