[Q&A Question 127] 2018.05.07
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This post was last edited by Internet Invisible Man on 2018-5-7 10:06. [Q&A Question 127] 2018.05.07: Briefly explain the function of the hydrogen circulation in hydrogenation, and how it differs from reforming ①The hydrogen circulation in hydrogenation is primarily used to supply the hydrogen required for the reaction and to remove the heat generated, thereby maintaining a certain hydrogen partial pressure, which helps to protect the catalyst ； ②The reforming reaction is an endothermic dehydrogenation reaction, and the circulation of hydrogen primarily serves to protect the catalyst from coking. (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. The APP short-video skills competition has started! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1951670
The main function of the hydrogen circulation in hydrogenation is to use hydrogen as a reactant for hydrogenation reactions aimed at removing oxygen, nitrogen, sulfur, or unsaturated hydrocarbons such as olefins. Although the catalytic reforming process is essentially a dehydrogenation reaction that produces hydrogen as a by-product, hydrogen circulation is still employed. The main reason is to prevent catalyst coking and the loss of catalyst activity. At the same reaction temperature, the catalyst becomes more easily deactivated when the hydrogen-to-oil ratio is low.
This post was last edited by zhangh on 2018-5-7 at 09:59. The hydrogen circulation in hydrogenation is primarily aimed at providing the hydrogen required for the reaction as well as removing the heat generated, thereby maintaining a certain hydrogen partial pressure. Reforming hydrogen serves as a reducing agent and is essential in the reforming reaction; it mixes with the reforming feed to enter the reactor where the reaction takes place. Additionally, the dehydrogenation reactions that occur during reforming produce large amounts of hydrogen, which can be used as raw material for other hydrogenation units, allowing for self-sufficiency in hydrogen supply. The hydrogen used for starting up the process is supplied from outside, while the hydrogen used in normal operation comes from the reforming process itself.
The main function of the hydrogen circulation in hydrogenation is to use hydrogen as a reactant for hydrogenation reactions aimed at removing oxygen, nitrogen, sulfur, or unsaturated hydrocarbons such as olefins. Although the catalytic reforming process is essentially a dehydrogenation reaction that produces hydrogen as a by-product, hydrogen circulation is still employed. The main reason is to prevent catalyst coking and the loss of catalyst activity. At the same reaction temperature, the catalyst becomes more easily deactivated when the hydrogen-to-oil ratio is low.
The hydrogen circulation in hydrogenation is primarily used to supply the hydrogen required for the reaction and to remove the heat generated. Maintaining a certain hydrogen partial pressure is beneficial for protecting the catalyst. The reforming reaction is an endothermic dehydrogenation reaction, and the circulation of hydrogen serves mainly to protect the catalyst from coking.
Answer: ① The hydrogen circulation in hydrogenation is primarily used to supply the hydrogen required for the reaction and to remove the heat generated, thereby maintaining a certain hydrogen partial pressure, which helps to protect the catalyst； ②The reforming reaction is an endothermic dehydrogenation reaction, and the circulation of hydrogen primarily serves to protect the catalyst from coking.
The hydrogen cycle in hydrogenation is primarily used to supply the hydrogen required for the reactions and to remove the heat generated, thereby maintaining a certain hydrogen partial pressure. Reforming hydrogen serves as a reducing agent and is essential for the reforming reactions; it mixes with the reforming feedstock and enters the reactor where the reactions take place. Meanwhile, the dehydrogenation reactions that occur during reforming also produce large amounts of hydrogen, which can be used as raw material for other hydrogenation units, allowing for self-sufficiency in hydrogen supply. The hydrogen needed for starting up the process is supplied from outside, while the hydrogen used in normal operations comes from the hydrogen produced by reforming.
Hydrogenation is primarily aimed at maintaining a stable and sufficient hydrogen partial pressure to meet the hydrogen demand of the reaction, and it also serves to remove the heat generated by the reaction； The main purpose of restructuring is probably to transfer heat, right?
The main function of the hydrogen circulation in hydrogenation is to use hydrogen as a reactant for hydrogenation reactions aimed at removing oxygen, nitrogen, sulfur, or unsaturated hydrocarbons such as olefins. Although the catalytic reforming process is essentially a dehydrogenation reaction that produces hydrogen as a by-product, hydrogen circulation is still employed. The main reason is to prevent catalyst coking and the loss of catalyst activity. At the same reaction temperature, the catalyst becomes more easily deactivated when the hydrogen-to-oil ratio is low.
The main function of the hydrogen circulation in hydrogenation is to use hydrogen as a reactant for hydrogenation reactions aimed at removing oxygen, nitrogen, sulfur, or unsaturated hydrocarbons such as olefins. Although the catalytic reforming process is essentially a dehydrogenation reaction that produces hydrogen as a by-product, hydrogen circulation is still employed. The main reason is to prevent catalyst coking and the loss of catalyst activity. At the same reaction temperature, the catalyst becomes more easily deactivated when the hydrogen-to-oil ratio is low.
The main function of the hydrogen circulation in hydrogenation is to use hydrogen as a reactant for hydrogenation reactions aimed at removing oxygen, nitrogen, sulfur, or unsaturated hydrocarbons such as olefins. Although the catalytic reforming process is essentially a dehydrogenation reaction that produces hydrogen as a by-product, hydrogen circulation is still employed. The main reason is to prevent catalyst coking and the loss of catalyst activity. At the same reaction temperature, the catalyst becomes more easily deactivated when the hydrogen-to-oil ratio is low.