[Q&A Question 196] 2017.07.15
Thread Content
This post was last edited by liuquan1100 on 2017-8-7 21:40. [Q&A Question 196] 2017.07.15 What are the advantages of using external regeneration for catalysts compared to internal regeneration? The reference answers will be visible after responding; scoring is awarded by identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Note: For questions of the type \"one question per day,\" if a person replies continuously for a month, that is, posts more than 30 times, their score will be assigned as 2 points, which is the lowest possible score. Click once to reply; if multiple replies are made, points will be awarded as appropriate, as deleting posts is also a waste of time. ①The catalyst regeneration time is short, which can reduce the downtime of the plant ； ②Conditions such as the regeneration temperature can be precisely controlled; the catalyst coking process is stable, regeneration is uniform, product quality remains consistent, and efficiency is high ； ③After regeneration, the catalysts are screened to remove particulate impurities ； ④The catalyst has high reactivity. Scoring criteria: 2 Wealth points for incorrect responses; *incomplete* answers earn 3–8 points. 10 Wealth points are given for correct answers accompanied by detailed explanations; responses that are correct but lack sufficient details earn 15–20 Wealth points. Please score according to these criteria. Note: If there are editing records after answering, only those who participated will be given points. For continuous malicious spamming, 2 points will be deducted each time, with no upper limit. Pure numbers, pure emojis, or random letters unrelated to the answer are all considered malicious spamming; points will start to be deducted after three warnings. 2017 Q&A Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html Petrochemical Sector – “Creative Ideas for Energy Savings” Campaign (Phase 2 is in full swing) http://bbs.hcbbs.com/thread-1666758-1-1.html 2017 Coal Chemicals – “My Technical Upgrades” http://bbs.hcbbs.com/thread-1786290-1-1.html
The regeneration process does not easily lead to local overheating; the catalyst’s activity is restored to a high level; it is possible to increase the operating hours of the hydrogenation unit; the equipment in the hydrogenation unit is no longer subjected to corrosion caused by sulfur-containing gases during regeneration; and it offers good economic benefits.
It requires little system time, ensures high quality in the regeneration process, and can reduce investment in internal regeneration equipment
(1) Reduces the risk of catalyst coking: it minimizes equipment corrosion and results in minimal loss of the specific surface area of the catalyst carrier; (2) The coking process is easy to control, with a low risk of overheating; (3) When renewing the catalyst through chlorination, chlorine injection is uniform and easy to regulate, ensuring an appropriate amount of chlorine is added to the catalyst as well as good dispersion of platinum metal; (4) Electrolytic hydrogen is used for catalyst reduction, which guarantees the quality of this reduction process; (5) It is easy to obtain relevant analysis data on the catalyst, such as sulfur, carbon, chlorine, and specific surface area, providing necessary technical references for future operations.
(1) Reduce the risk of catalyst charring: minimize equipment corrosion and reduce the loss of specific surface area of the catalyst carrier； (2) The burning process is easy to control, with a low risk of overheating ； (3) During the chlorination renewal of the catalyst, chlorine injection is uniform and easy to control, ensuring an appropriate amount of chlorine on the catalyst as well as good dispersion of platinum metal ； (4) Electrolytic hydrogen is used for catalyst reduction, ensuring the quality of catalyst reduction ； (5) It is easy to obtain relevant analytical data of the catalyst, such as sulfur, carbon, chlorine, specific surface area, etc., which provides the necessary technical reference for future operation.
Local overheating is unlikely to occur during catalyst regeneration, and the catalyst’s activity is restored to a high level
(1) Reduce the risk of catalyst charring: minimize equipment corrosion and reduce the loss of specific surface area of the catalyst carrier； (2) The burning process is easy to control, with a low risk of overheating ； (3) During the chlorination renewal of the catalyst, chlorine injection is uniform and easy to control, ensuring an appropriate amount of chlorine on the catalyst as well as good dispersion of platinum metal ； (4) Electrolytic hydrogen is used for catalyst reduction, ensuring the quality of catalyst reduction ； (5) It is easy to obtain relevant analytical data of the catalyst, such as sulfur, carbon, chlorine, specific surface area, etc., which provides the necessary technical reference for future operation.
(1) Reduce the risk of catalyst charring: minimize equipment corrosion and reduce the loss of specific surface area of the catalyst carrier； (2) The burning process is easy to control, with a low risk of overheating ； (3) During the chlorination renewal of the catalyst, chlorine injection is uniform and easy to control, ensuring an appropriate amount of chlorine on the catalyst as well as good dispersion of platinum metal ； (4) Electrolytic hydrogen is used for catalyst reduction, ensuring the quality of catalyst reduction ； (5) It is easy to obtain relevant analysis data of the catalyst, such as sulfur, carbon, chlorine, specific surface area, etc.,
①The catalyst has a short regeneration time, which helps to reduce the downtime of the facility. ② The regeneration temperature and other conditions can be controlled accurately; as a result, the catalyst burns evenly, leading to stable product quality and high efficiency. ③ After regeneration, the catalysts are screened to remove any particulate impurities. ④ The catalysts retain high activity after regeneration.
The advantage of using off-device catalyst regeneration is as follows: (1) It reduces the risk of catalyst charring: it minimizes equipment corrosion and results in minimal loss of the specific surface area of the catalyst carrier； (2) The burning process is easy to control, with a low risk of overheating ； (3) During the chlorination renewal of the catalyst, chlorine injection is uniform and easy to control, ensuring an appropriate amount of chlorine on the catalyst as well as good dispersion of platinum metal ； (4) Electrolytic hydrogen is used for catalyst reduction, ensuring the quality of catalyst reduction ； (5) It is easy to obtain relevant analytical data on the catalyst, such as sulfur, carbon, chlorine, specific surface area, etc., which provides the necessary technical basis for future operation
This post was last edited by wangld on 2017-7-15 at 13:12. ① The catalyst regeneration time is short, which can reduce the downtime of the plant； ②Conditions such as the regeneration temperature can be precisely controlled; the catalyst coking process is stable, regeneration is uniform, product quality remains consistent, and efficiency is high ； ③After regeneration, the catalysts are screened to remove particulate impurities ； ④The catalyst has high reactivity.