【Q&A Question 056】February 25, 2018
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【Q&A Question 056】February 25, 2018: Why must all the hydrogen be recycled during the shutdown of the hydrogenation process? Answer: 1. Reduce the oil application time ； 2. Fast cooling rate ； 3. Purge the catalyst bed to protect its activity. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Due to the limitations 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 ongoing in the Chemical Engineering section) https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=18978. Summary post of daily questions for the 2018 Chemical Engineering Technology Training section: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888971. Summary post of daily images for the 2018 Registered Equipment section: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888970. Summary post of Q&A questions for the 2018 Hydrogen Production and Hydrogenation Technology section: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888968. Summary post of daily questions for the 2018 LNG Technology Discussion section: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888973. Summary post of Q&A questions for 2017 (updates have started): https://bbs.hcbbs.com/thread-1657793-1-1.html. Summary post of daily questions for 2017 (updates have started): https://bbs.hcbbs.com/thread-1657794-1-1.html. Summary post of daily images for 2017: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1875160. List of daily questions for the 2017 LNG section: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1804162. Summary post of Q&A questions for 2016 (updates completed): https://bbs.hcbbs.com/thread-1597792-1-1.html
Why must all the hydrogen be circulated during shutdown for hydrogenation? Answer: 1. To reduce the time during which oil is present; 2. To achieve a faster cooling rate; 3. To purge the catalyst bed and protect its activity.
Are you referring to the shutdown due to an accident? The full-cycle method brings the bed temperature down in the shortest possible time
(1) Reduce the oil contact time; (2) Fast cooling rate; (3) Purge the catalyst bed to protect its activity.
(1) Reduce the oil contact time; (2) Fast cooling rate; (3) Purge the catalyst bed to protect its activity.
1. Reduce the oiling time； 2. Fast cooling rate ； 3. Purge the catalyst bed to protect its activity.
1. Reduce the time spent with oil present. 2. Fast cooling rate. 3. Purge the catalyst bed to preserve its activity.
(1) Reduce the oil contact time; (2) Fast cooling rate; (3) Purge the catalyst bed to protect its activity.
(1) Reduce the oil contact time; (2) Fast cooling rate; (3) Purge the catalyst bed to protect its activity.
1. Reduce the oiling time； 2. Fast cooling rate ； 3. Purge the catalyst bed to protect its activity.
(1) Reduce the oil contact time; (2) Fast cooling rate; (3) Purge the catalyst bed to protect its activity.