Hydrorefining, reforming, cracking
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This post was last edited by liuquan1100 on 2017-1-11 20:28. Hello, colleagues. What is the difference between hydrorefining, hydroreforming, and hydrocracking? I forget to help everyone solve their problems.
As far as I know, hydrocracking refers to the process of removing impurities and saturating olefins through hydrogenation, while also having the capability to crack molecules into lighter hydrocarbons； The main reactions in hydrorefining are hydrodesulfurization, hydrodenitration, hydrodeoxygenation, saturated hydrogenation of olefins and aromatics, and hydrometallurgy. Hydroreforming is unclear. Can it be understood that hydrorefining is the same as hydroprocessing, just with different terms used?
1. Hydrorefining: The main reactions in hydrorefining include hydrodesulfurization, hydrodenitration, hydrodeoxygenation, saturated hydrogenation of olefins and aromatics, as well as hydrodemetallization. 2. Modification reaction: This is aimed at increasing the cetane number, which is an important indicator of the combustion performance of diesel. Among diesel fractions, alkanes have the highest cetane number, followed by naphthenes, while aromatics have the lowest cetane number. Among hydrocarbons of the same type, those with a low degree of isomerism for the same number of carbon atoms have a higher cetane number, while hydrocarbons with a large number of aromatic rings have a lower cetane number. Therefore, diesel with a low content of cyclic hydrocarbons and a high content of linear hydrocarbons has a higher cetane number. 3. Hydrocracking: It is a processing method in which, under high pressure and temperature conditions, hydrogen acts as a catalyst to induce hydrogenation, cracking, and isomerization reactions in heavy oils, converting them into light oils (gasoline, kerosene, diesel, or raw materials for catalytic cracking and olefin production). What sets it apart from catalytic cracking is that hydrocracking involves hydrogenation reactions of hydrocarbons simultaneously. The yield of liquid products from hydrocracking exceeds 98%, and their quality is also much higher than that of products obtained through catalytic cracking. Although hydrocracking has many advantages, it is not as widely used as catalytic cracking due to the demanding operating conditions required – high pressure, the need for specialized alloy steels, significant hydrogen consumption, and high investment costs.
May I ask, what are the devices used in hydroprocessing?
The explanation is very thorough. :victory::victory::victory: