【Q&A Question 041】2018.02.10
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【Q&A Question 041】February 10, 2018: What are the advantages of using a reducing atmosphere to protect the catalyst during conversion parking? Protecting the conversion catalyst with a reducing atmosphere while parking is primarily aimed at preventing the catalyst from oxidizing. It offers the following benefits for the catalyst: (1) reducing the number of repeated oxidation-reduction cycles of the catalyst. It contributes to the stability of the catalyst’s structural properties and activity. (2) Reduce startup time: when restarting after shutdown under a reducing atmosphere, there is no need for re-reduction; it is sufficient to raise the temperature to the conditions required for oil injection under a reducing atmosphere. Shutting down under a reducing atmosphere is beneficial for extending the catalyst’s service life as well as for saving energy and reducing consumption; this method should be employed for shutdowns whenever conditions permit. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Due to the limits on the number of posts in the “One Question per Day” section, “One Image per Day” has been moved to the registered devices section; you can access it through the directory I posted. For management purposes, if you need to access content from a few days ago, please go to the summary post below to enter the “My Registration Season” event – (Note: This event is currently underway in the Chemical Engineering section). https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=18978 For the daily questions section related to chemical engineering technology training in 2018: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888971 For the daily image summary section related to registered equipment in 2018: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888970 For the Q&A section related to hydrogen production and hydrogenation technologies in 2018: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888968 For the daily questions section related to LNG technology in 2018: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888973 For the Q&A section from 2017 (updates have started): https://bbs.hcbbs.com/thread-1657793-1-1.html For the daily questions section from 2017 (updates have started): https://bbs.hcbbs.com/thread-1657794-1-1.html For the daily image summary section from 2017: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1875160 For the list of daily questions related to LNG in 2017: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1804162 For the Q&A section from 2016 (updates are complete): https://bbs.hcbbs.com/thread-1597792-1-1.html
Answer: Protecting the conversion catalyst with a reducing atmosphere when parking is mainly aimed at preventing the catalyst from oxidizing. It offers the following benefits for catalysts: 1. It reduces the number of repeated oxidation-reduction cycles, which helps to maintain the structural properties and activity of the catalyst. 2. Reduce startup time. When restarting after stopping under a reducing atmosphere, there is no need to re-reduce; it is sufficient to raise the temperature to the feeding conditions in a reducing atmosphere before feeding the material. Shutting down under a reducing atmosphere is beneficial for extending the catalyst’s service life as well as saving energy and reducing consumption; units that have the necessary conditions should adopt this method for shutdown.
This post was last edited by “The Moon in My Hometown is Round” on February 10, 2018, at 09:04. It serves to protect the reducing atmosphere of the converter and prevent the catalyst from oxidizing； Reduce the number of catalyst redox reactions ； Reduce startup time ；
Protecting the conversion catalyst with a reducing atmosphere while parking is primarily aimed at preventing the catalyst from oxidizing. It offers the following benefits for the catalyst: (1) It reduces the number of repeated oxidation-reduction cycles, which helps to maintain the structural properties and activity of the catalyst. (2) Reduce startup time. When restarting after stopping under a reducing atmosphere, there is no need to re-reduce; it is sufficient to raise the temperature to the feeding conditions in a reducing atmosphere before feeding the material.
Protecting the conversion catalyst with a reducing atmosphere while parking is primarily aimed at preventing the catalyst from oxidizing. It offers the following benefits for the catalyst: (1) It reduces the number of repeated oxidation-reduction cycles, which helps to maintain the structural properties and activity of the catalyst. (2) Reduce startup time. When restarting after stopping under a reducing atmosphere, there is no need to re-reduce; it is sufficient to raise the temperature to the feeding conditions in a reducing atmosphere before feeding the material.
Protecting the conversion catalyst with a reducing atmosphere while parking is primarily aimed at preventing the catalyst from oxidizing. It offers the following benefits for the catalyst: (1) It reduces the number of repeated oxidation-reduction cycles, which helps to maintain the structural properties and activity of the catalyst. (2) Reduce startup time. When restarting after stopping under a reducing atmosphere, there is no need to re-reduce; it is sufficient to raise the temperature to the feeding conditions in a reducing atmosphere before feeding the material. Shutting down under a reducing atmosphere is beneficial for extending the catalyst’s service life as well as saving energy and reducing consumption; units that have the necessary conditions should adopt this method for shutdown.
Protecting the conversion catalyst with a reducing atmosphere while parking is primarily aimed at preventing the catalyst from oxidizing. It offers the following benefits for the catalyst: (1) It reduces the number of repeated oxidation-reduction cycles, which helps to maintain the structural properties and activity of the catalyst. (2) Reduce startup time. When restarting after stopping under a reducing atmosphere, there is no need to re-reduce; it is sufficient to raise the temperature to the feeding conditions in a reducing atmosphere before feeding the material.
Protecting the conversion catalyst with a reducing atmosphere while parking it serves primarily to prevent oxidation of the catalyst, and it offers the following benefits for the catalyst: 1. It reduces the number of times the catalyst undergoes oxidation-reduction cycles, which helps to maintain the structural properties and activity of the catalyst. 2 Reduce the startup time: when restarting after stopping under a reducing atmosphere, there is no need for re-reduction; it is sufficient to raise the temperature to the conditions required for oil injection under a reducing atmosphere. Shutting down in a reducing atmosphere is beneficial for extending the catalyst’s service life as well as saving energy and reducing consumption; units that have the necessary conditions should adopt this method for shutdown.
Protecting the conversion catalyst with a reducing atmosphere while parking is primarily aimed at preventing the catalyst from oxidizing. It offers the following benefits for the catalyst: (1) It reduces the number of repeated oxidation-reduction cycles, which helps to maintain the structural properties and activity of the catalyst. (2) Reduce startup time. When restarting after stopping under a reducing atmosphere, there is no need to re-reduce; it is sufficient to raise the temperature to the feeding conditions in a reducing atmosphere before feeding the material.
Prevent the catalyst from oxidizing; once the catalyst oxidizes, it becomes difficult to reduce it back to active metallic nickel