【Q&A Question 334】December 18, 2017
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【Q&A Question 334】December 18, 2017: What is the effect of a high hydrogen partial pressure on the reaction? A high hydrogen partial pressure is beneficial for the hydrogenation reaction, as it is an exothermic process that consumes hydrogen and results in a reduction in volume. Increasing the hydrogen partial pressure enhances the depth of the reaction and also helps to prevent coking of the catalyst. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) For management purposes, if you need to view content from a few days ago, please go through the summary post below. 2017 Q&A Summary Thread (updates starting now) https://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates starting now) https://bbs.hcbbs.com/thread-1657794-1-1.html 2017 Daily Image Summary Thread https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1875160 2017 LNG Version Daily Question List https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1804162 2016 Q&A Summary Thread (updates completed) https://bbs.hcbbs.com/thread-1597792-1-1.html
To increase the degree of reaction in hydrorefining, a sufficient hydrogen partial pressure is required; the volume of recycled gas is less important. Generally, to maintain a high enough hydrogen partial pressure, the most economical approach is to increase the total pressure rather than the volume of recycled gas. A high hydrogen partial pressure is beneficial for the hydrogenation reaction, as it is an exothermic process that consumes hydrogen and results in a reduction in volume. Increasing the hydrogen partial pressure enhances the depth of the reaction and also helps to prevent coking of the catalyst.
Good desulfurization, denitrification, and aromatic saturation effects； The depth of catalytic cracking increases
A high hydrogen partial pressure facilitates the progress of the hydrogenation reaction and prevents carbon deposition on the catalyst!
A high hydrogen partial pressure can suppress coking reactions, reduce the catalyst deactivation rate, and accelerate the rate of hydrorefining reactions; it is particularly beneficial for the hydrogenation saturation of polycyclic aromatics.
The effect of reaction pressure is manifested through the hydrogen partial pressure. The hydrogen partial pressure in the system is determined by the operating pressure, hydrogen-to-oil ratio, purity of the recycled hydrogen, and the vaporization rate of the feed oil. Increasing pressure is beneficial for hydrogenation reactions. For aromatic hydrogenation reactions constrained by thermodynamic equilibrium, the effect of pressure is particularly significant. An increase in hydrogen partial pressure increases the saturation of aromatic compounds, thereby improving the performance of related products. A high hydrogen partial pressure prolongs the catalyst’s service life by reducing its coking rate. As a result, the operating factor increases and the cost of the catalyst decreases
Promote the reaction and increase its depth
The reaction depth is large, resulting in products with overall lighter properties
Increasing the partial pressure is beneficial for catalytic reactions; on one hand, it can suppress coking reactions and reduce the rate of catalyst deactivation； On the other hand, it can improve the removal rates of HDS, HDN, and HDM, while also promoting the hydrogenation and saturation reaction of polycyclic aromatics.
To increase the degree of reaction in hydrorefining, a sufficient hydrogen partial pressure is required; the volume of recycled gas is less important. Generally, to maintain a high enough hydrogen partial pressure, the most economical approach is to increase the total pressure rather than the volume of recycled gas. A high hydrogen partial pressure is beneficial for the hydrogenation reaction, as it is an exothermic process that consumes hydrogen and results in a reduction in volume. Increasing the hydrogen partial pressure means increasing the depth of the reaction, and it also helps to prevent coking of the catalyst
A high hydrogen partial pressure is favorable for the hydrogenation reaction.