Chromatography column
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Ethylene is intended to be produced by dehydrating anhydrous ethanol using an N2 carrier and a catalyst. Over 75% of the product is N2, with the remainder consisting of 15% ethylene, 5% propylene, 2% n-butylene, 2% isobutylene, and 1% pentene. What detector should be used for chromatographic analysis of this gas? What chromatography column to use? Filling or capillary? What are the testing conditions like? Thank you!
Other than nitrogen, there are olefins; a packed column and hydrogen flame detection can be used
Does no one know? :lol
Why not just ask the manufacturer directly about this question? ? Do you want to assemble the instruments by yourself? If you buy them, you should ask the manufacturer directly; as for the price and such, it depends on your own capabilities.
In the owner’s experiment, after dehydrating anhydrous ethanol, does the water enter the chromatograph along with the product? That is, has the sample gas been dehydrated? In this dehydration process, a large amount of water is involved, and water has a significant impact on the selection of chromatography columns as well as on the chromatographic signals. If only the olefins produced by the dehydration of alcohols are to be analyzed, it is recommended to use a packed column with a TCD detector and hydrogen as the carrier gas, which allows for the detection of nitrogen, ethylene, propylene, butylene, and others. If a capillary column and FID detector are used, nitrogen cannot be analyzed; to detect nitrogen, a micro TCD detector is required.
Is there water in the product? For gas analysis, it is recommended to use a FID detector with hydrogen as the carrier gas, in order to detect ethylene, propylene, butylenes, and others simultaneously. If analyzing N2, it is better to use a TCD detector alone, with hydrogen as the carrier gas, to fill the column and conduct the detection.