[Q&A Question 070] 2017.03.11
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This post was last edited by 955559 on 2017-7-21 22:19. [Q&A Question No. 070] Why does a high content of carbon monoxide and carbon dioxide in the fresh hydrogen lead to overheating of the catalyst bed? 2017.03.11 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.) ) Under production conditions, carbon monoxide, carbon dioxide, and hydrogen react to form methane, releasing a large amount of heat that disrupts the thermal balance of the reactor, causing the bed temperature to rise and resulting in overheating of the bed. 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 Third Phase of Haimen Chemical’s Outstanding Management Members Selection Contest http://bbs.hcbbs.com/thread-1655902-1-1.html (Source: Haimen Chemical Forum)
It releases heat because methanation reactions occur easily.
The methanation reaction releases a large amount of heat.
The reaction in which carbon monoxide and carbon dioxide are hydrogenated to form methane is called methanation； The methanation reaction releases a large amount of heat, which can easily cause the catalyst bed to overheat
The reaction in which carbon monoxide and carbon dioxide are hydrogenated to form methane is called methanation ； The methanation reaction releases a large amount of heat, which can easily cause the catalyst bed to overheat.
Carbon monoxide and carbon dioxide react with the components in the catalyst to produce nickel carbonyl.
Because under production conditions, carbon monoxide, carbon dioxide, and hydrogen react to form methane, releasing a large amount of heat that disrupts the thermal balance of the reactor, causing the bed temperature to rise and resulting in bed overheating.
Methanation reactions can occur, and at high levels this can cause the catalyst to overheat!
Carbon monoxide, carbon dioxide, and hydrogen undergo methanation reactions at a temperature of around 280°C