【Q&A Question 243】2018.09.06
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This post was last edited by Green Lotus on 2018-9-6 at 15:08. [Q&A Question 243] 2018.09.06: Briefly describe the impact of various key operational parameters in the reaction system on the hydrogenation reaction 1) System pressure: High pressure is favorable for the hydrogenation reaction, but it is limited by the operating pressure of the equipment ； 2) Hydrogen partial pressure: An increase in the hydrogen partial pressure can sustain the coking reaction, promote the hydrogenation saturation reaction, and reduce the rate of catalyst deactivation; therefore, the hydrogen partial pressure should be increased as much as possible within the limits permitted by the equipment and operating conditions ； 3) Circulating hydrogen flow rate: Its role is to maintain a high hydrogen partial pressure and remove the heat generated by the reaction in the catalyst bed; maintaining a high circulating hydrogen flow rate as much as possible is beneficial for the hydrogenation reaction ； 4) Circulating hydrogen purity: An increase in the purity of circulating hydrogen ensures an adequate hydrogen partial pressure, which is beneficial for the hydrogenation reaction ； 5) Reaction temperature: Increasing the temperature can accelerate the reaction rate and enhance the degree of reaction ； However, the deactivation rate of the catalyst increases at high temperatures, especially as localized high temperatures have the most adverse effect on the catalyst’s service life. A reasonable temperature should be controlled based on the performance of the catalyst in each bed layer, in order to ensure an optimal temperature distribution as much as possible and thus extend the catalyst’s service life. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below
(1) System pressure: High pressure is favorable for the hydrogenation reaction, but it is limited by the operating pressure of the equipment. (2) Hydrogen partial pressure: An increase in the hydrogen partial pressure can inhibit coking reactions, promote hydrogenation saturation reactions, and reduce the catalyst deactivation rate; therefore, the hydrogen partial pressure should be increased as much as possible within the limits permitted by the equipment and operating conditions. (3) Circulating hydrogen flow rate: Its role is to maintain a high hydrogen partial pressure and remove the heat generated by the reaction in the catalyst bed; maintaining a high circulating hydrogen flow rate as much as possible is beneficial for the hydrogenation reaction
1) System pressure: High pressure is favorable for the hydrogenation reaction, but it is limited by the operating pressure of the equipment； 2) Hydrogen partial pressure: An increase in the hydrogen partial pressure can sustain the coking reaction, promote the hydrogenation saturation reaction, and reduce the rate of catalyst deactivation; therefore, within the limits permitted by the equipment and operating conditions, the hydrogen partial pressure should be increased as much as possible ； 3) Circulating hydrogen flow rate: Its role is to maintain a high hydrogen partial pressure and remove the heat generated by the reaction in the catalyst bed; maintaining a high circulating hydrogen flow rate as much as possible is beneficial for the hydrogenation reaction ； 4) Circulating hydrogen purity: An increase in the purity of circulating hydrogen ensures an adequate hydrogen partial pressure, which is beneficial for the hydrogenation reaction ； 5) Reaction temperature: Increasing the temperature can accelerate the reaction rate and enhance the degree of reaction ； However, the deactivation rate of the catalyst increases at high temperatures, especially as localized high temperatures have the most adverse effect on the catalyst’s service life. A reasonable temperature should be controlled based on the performance of the catalyst in each bed layer, in order to ensure an optimal temperature distribution as much as possible and thus extend the catalyst’s service life.
Generally speaking, it seems like the topic is too broad. As the temperature rises, the degree of reaction increases; the effects of refinement and cracking become more pronounced, as does carbon deposition, which is not conducive to the long-term operation of the plant ； An increase in pressure (hydrogen partial pressure) is favorable for the reaction, and further raising the pressure enhances the denitration effect ； As the hydrogen-to-oil ratio increases, the distribution improves, which is beneficial for the reaction ；
1) System pressure: High pressure is favorable for the hydrogenation reaction, but it is limited by the operating pressure of the equipment； 2) Hydrogen partial pressure: An increase in the hydrogen partial pressure can sustain the coking reaction, promote the hydrogenation saturation reaction, and reduce the rate of catalyst deactivation; therefore, within the limits permitted by the equipment and operating conditions, the hydrogen partial pressure should be increased as much as possible ； 3) Circulating hydrogen flow rate: Its role is to maintain a high hydrogen partial pressure and remove the heat generated by the reaction in the catalyst bed; maintaining a high circulating hydrogen flow rate as much as possible is beneficial for the hydrogenation reaction ； 4) Circulating hydrogen purity: An increase in the purity of circulating hydrogen ensures an adequate hydrogen partial pressure, which is beneficial for the hydrogenation reaction ； 5) Reaction temperature: Increasing the temperature can accelerate the reaction rate and enhance the degree of reaction ； However, the deactivation rate of the catalyst increases at high temperatures, especially as localized high temperatures have the most adverse effect on the catalyst’s service life. A reasonable temperature should be controlled based on the performance of the catalyst in each bed layer, in order to ensure an optimal temperature distribution as much as possible and thus extend the catalyst’s service life.
This post was last edited by hesonchang214 on 2018-9-6 at 11:10. 1) System pressure: High pressure is favorable for the hydrogenation reaction, but it is limited by the operating pressure of the equipment； 2) Hydrogen partial pressure: An increase in the hydrogen partial pressure can sustain the coking reaction, promote the hydrogenation saturation reaction, and reduce the rate of catalyst deactivation; therefore, within the limits permitted by the equipment and operating conditions, the hydrogen partial pressure should be increased as much as possible ； 3) Circulating hydrogen flow rate: Its role is to maintain a high hydrogen partial pressure and remove the heat generated by the reaction in the catalyst bed; maintaining a high circulating hydrogen flow rate as much as possible is beneficial for the hydrogenation reaction ； 4) Circulating hydrogen purity: An increase in the purity of circulating hydrogen ensures an adequate hydrogen partial pressure, which is beneficial for the hydrogenation reaction ； 5) Reaction temperature: Increasing the temperature can accelerate the reaction rate and enhance the degree of reaction ； However, the deactivation rate of the catalyst increases at high temperatures, especially as localized high temperatures have the most adverse effect on the catalyst’s service life. A reasonable temperature should be controlled based on the performance of the catalyst in each bed layer, in order to ensure an optimal temperature distribution as much as possible and thus extend the catalyst’s service life
(1) System pressure: High pressure is favorable for the hydrogenation reaction, but it is limited by the operating pressure of the equipment. (2) Hydrogen partial pressure: An increase in the hydrogen partial pressure can inhibit coking reactions, promote hydrogenation saturation reactions, and reduce the catalyst deactivation rate; therefore, the hydrogen partial pressure should be increased as much as possible within the limits permitted by the equipment and operating conditions. (3) Circulating hydrogen flow rate: Its role is to maintain a high hydrogen partial pressure and remove the heat generated by the reaction in the catalyst bed. Maintaining a high circulating hydrogen flow rate as much as possible is beneficial for the hydrogenation reaction. (4) Purity of recycled hydrogen ； An improved purity of recycled hydrogen ensures an adequate hydrogen partial pressure, which is beneficial for the hydrogenation reaction. (5) Reaction temperature: An increase in temperature can accelerate the hydrogenation reaction rate and enhance the degree of reaction ； However, the deactivation rate of the catalyst also increases at high temperatures, with localized high temperatures being particularly detrimental to its service life. A reasonable temperature should be controlled based on the performance of the catalyst in each bed layer, in order to ensure an optimal temperature distribution as much as possible and thus extend the catalyst’s service life.
1) System pressure: High pressure is favorable for the hydrogenation reaction, but it is limited by the operating pressure of the equipment； 2) Hydrogen partial pressure: An increase in the hydrogen partial pressure promotes the hydrogenation saturation reaction and reduces the rate of catalyst deactivation; therefore, within the limits permitted by the equipment and operating conditions, the hydrogen partial pressure should be increased as much as possible ； 3) Circulating hydrogen flow rate: Its role is to maintain a high hydrogen partial pressure and remove the heat generated by reactions in the catalyst bed. Maintaining a high circulating hydrogen flow rate will be beneficial for the hydrogenation reaction. 4) Circulating hydrogen purity: An increased purity of circulating hydrogen ensures an adequate hydrogen partial pressure, which is beneficial for the hydroprocessing reaction. 5) Reaction temperature: Increasing the temperature can accelerate the reaction rate and enhance the degree of reaction ； However, the deactivation rate of the catalyst increases at high temperatures, especially as localized high temperatures have the most adverse effect on the catalyst’s service life. A reasonable temperature should be controlled based on the performance of the catalyst in each bed layer, in order to ensure an optimal temperature distribution as much as possible and thus extend the catalyst’s service life.
1) System pressure: High pressure is favorable for the hydrogenation reaction, but it is limited by the operating pressure of the equipment； 2) Hydrogen partial pressure: An increase in the hydrogen partial pressure can sustain the coking reaction, promote the hydrogenation saturation reaction, and reduce the rate of catalyst deactivation; therefore, the hydrogen partial pressure should be increased as much as possible within the limits permitted by the equipment and operating conditions ； 3) Circulating hydrogen flow rate: Its role is to maintain a high hydrogen partial pressure and remove the heat generated by the reaction in the catalyst bed; maintaining a high circulating hydrogen flow rate as much as possible is beneficial for the hydrogenation reaction ； 4) Circulating hydrogen purity: An increase in the purity of circulating hydrogen ensures an adequate hydrogen partial pressure, which is beneficial for the hydrogenation reaction ； 5) Reaction temperature: Increasing the temperature can accelerate the reaction rate and enhance the degree of reaction ； However, the deactivation rate of the catalyst increases at high temperatures, especially as localized high temperatures have the most adverse effect on the catalyst’s service life. A reasonable temperature should be controlled based on the performance of the catalyst in each bed layer, in order to ensure an optimal temperature distribution as much as possible and thus extend the catalyst’s service life.
(1) System pressure: High pressure is favorable for the hydrogenation reaction, but it is limited by the operating pressure of the equipment. (2) Hydrogen partial pressure: An increase in the hydrogen partial pressure can inhibit coking reactions, promote hydrogenation saturation reactions, and reduce the catalyst deactivation rate; therefore, the hydrogen partial pressure should be increased as much as possible within the limits permitted by the equipment and operating conditions. (3) Circulating hydrogen flow rate: Its role is to maintain a high hydrogen partial pressure and remove the heat generated by the reaction in the catalyst bed. Maintaining a high circulating hydrogen flow rate as much as possible is beneficial for the hydrogenation reaction.