[Q&A Question 066] June 25, 2016
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【Q&A Question 066】June 25, 2016: What is the pattern regarding the reaction rates in various hydrorefining reactions? The answer key can be seen after responding; scoring is based on identifying the key points. The main factors affecting the reaction depth include: catalyst performance, properties of the feed oil, reaction temperature, pressure, space velocity, hydrogen-to-oil ratio, etc. With the current methods, the performance of the catalyst and the properties of the raw materials are uncontrollable; all other factors can be adjusted. The higher the reaction temperature, the higher the reaction pressure, the lower the space velocity, the greater the hydrogen-to-oil ratio, and the greater the degree of reaction ； Conversely, the lower the depth.
The higher the CAT temperature, the faster the reaction rate.
Generally, hydrogenation reactions follow the following order (ranked by reaction rate): demetallization > diene saturation > desulfurization > deoxygenation > monene saturation > denitration > aromatic saturation
The reaction rate is generally related to temperature and pressure; the higher the temperature, the more pronounced the desulfurization effect, and the higher the pressure, the more significant the denitrification effect
Within a certain range, the higher the reaction temperature, the faster the reaction rate; the higher the catalyst activity, the faster the reaction rate
With the same raw materials and stable properties, the higher the temperature, pressure, and hydrogen-to-oil ratio, the faster the reaction rate and the greater the degree of reaction； Catalyst activity: the higher the activity, the faster the reaction rate ； In various forms of hydrorefining reactions, the order of difficulty in hydrogenation follows this rule: (1) The breaking of C-C bonds is more difficult than the breaking of C-O, C-S, and C-N bonds ； (2) Aromatic hydrogenation > Hydrodenitration > Hydrodeoxygenation > Hydrodesulfurization ； (3) Aromatic hydrogenation >> Olefin hydrogenation >> Cyclohydrocarbon hydrogenation ； (4) Monocyclic aromatic hydrocarbon hydrogenation > Bicyclic aromatic hydrocarbon hydrogenation > Polycyclic aromatic hydrocarbon hydrogenation ；
With the same raw materials and stable properties, the higher the temperature, pressure, and hydrogen-to-oil ratio, the faster the reaction rate and the greater the degree of reaction； Catalyst activity: the higher the activity, the faster the reaction rate ；
Generally, hydrogenation reactions follow the following order (ranked by reaction rate): demetallization > diene saturation > desulfurization > deoxygenation > monene saturation > denitration > aromatic saturation
Generally, hydrogenation reactions follow the following order (ranked by reaction rate): demetallization > diene saturation > desulfurization > deoxygenation > monene saturation > denitration > aromatic saturation
It accelerates as temperature increases, and it also accelerates as pressure increases