The issue of hydrogen content in the overhead gas of the gasoline hydrodesulfurization fractionator
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In the overhead gas of the gasoline hydrodesorption tower, the hydrogen content in this gas is analyzed in order to determine the extent of the olefin addition reaction in the selective hydrogenation reactor; what should be the appropriate level for this content? How should this reaction depth be understood? Or rather, how can one determine whether the reaction in a selective hydrogenation reactor is optimal?
Relying solely on this hydrogen purity indicator is insufficient to accurately determine the degree of olefin saturation during gasoline hydrogenation; it is necessary to measure both the group composition of the gasoline after hydrogenation and the changes in its olefin content, as well as to examine the bromine number value of the gasoline. During the hydrogenation of crude gasoline, in addition to the saturation of olefins, there are also processes of sulfur compound conversion, as well as the conversion of nitrogen compounds and oxides; a comprehensive evaluation is necessary.