How to achieve hydrogen balance in a hydrogenation unit
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Our plant’s hydrogenation unit consumes less hydrogen when using foreign-grade reagents, but more hydrogen when using domestic reagents; however, the quality of the products produced is inferior to that obtained with foreign-grade reagents. I would like to know what the difference lies in Where does all the hydrogen added to the hydrogenation unit go? Why is the hydrogen consumption lower in foreign plants? Can the difference between them be understood by performing a hydrogen balance, and how is such a balance carried out?
This is mainly related to the composition of the catalyst; high hydrogen consumption indicates that large molecular hydrocarbons are reacting, and these are not the desired products, so the quality of the product is poor. Hydrogen consumption also increases.
Do you mean that high hydrogen consumption indicates more chain breaks in the macromolecules? So, by analyzing which parameters can we determine how much of the macromolecular hydrocarbons have been converted?
1. Yield of the target product. 2. Family composition of the product. For example, the purpose of hydrodenating diesel is to lower its freezing point; isomerization dewaxing can be used to alter the molecular structure in order to reduce the freezing point of diesel, with the aim of avoiding other reactions that would increase hydrogen consumption and reduce the yield of the desired product. All of these factors are related to the structure of the hydrogenation catalyst carrier.