【Q&A Question 007】2017.01.07
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This post was last edited by liuquan1100 on 2017-7-21 13:19. [Q&A Question No. 007] 2017.01.07: How to evaluate catalyst activity? The reference answers will be visible after responding; points are awarded by identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Catalyst activity is manifested in a fast reaction rate, high production efficiency, small reaction vessels and low catalyst usage, high space velocity, mild operating conditions, and lower reaction temperatures. 2017 Q&A Summary Thread (updates have started) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have started) 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 Xinchang Cup – 2016 Haichuan Top 10 Selection – Please recommend candidates http://bbs.hcbbs.com/thread-1654112-1-1.html Third Round of Haichuan Outstanding Management Members Selection http://bbs.hcbbs.com/thread-1655902-1-1.html (Source: Haichuan Chemical Forum)
Reaction temperature rise, product desulfurization efficiency, bed pressure drop, and so on
From the perspective of the physicochemical properties of the catalyst itself, it is the content of active centers, pore structure, specific surface area, and other physical characteristics that determine its activity； From an application perspective, activity may be reflected in the reactant conversion rate and catalyst lifetime. Selectivity and product yield represent the requirements for high-quality catalysts based on their activity.
In industrial applications, the activity of catalysts can be evaluated using the following methods: 1. Initial reaction temperature – a better activity is indicated when a reaction occurs at lower inlet temperatures； 2. Bed temperature difference: Under the same inlet temperature conditions, a larger bed temperature difference implies higher activity ； 3. The lower the concentration of the reactant with a lower inlet content at the outlet, the better the catalyst activity. 4. At the same gas flow rate, observe the trend in the bed resistance; if it increases compared to before, it indicates that the activity is lower.
1. Initial reaction temperature: Better activity is observed at lower inlet temperatures when a reaction occurs； 2. Bed temperature difference: Under the same inlet temperature conditions, a larger bed temperature difference implies higher activity ； 3. The lower the concentration of the reactant with a lower inlet content at the outlet, the better the catalyst activity.
Catalyst activity is manifested in a fast reaction rate, high production efficiency, small reaction vessels and low catalyst usage, high space velocity, mild operating conditions, and a lower reaction temperature.
1. High reaction efficiency 2. Good selectivity 3. Long service life 4. Good resistance to toxins
1. Initial reaction temperature: Better activity is observed at lower inlet temperatures when a reaction occurs； 2. Bed temperature difference: Under the same inlet temperature conditions, a larger bed temperature difference implies higher activity ； 3. The lower the concentration of the reactant with a lower inlet content at the outlet, the better the catalyst activity.
1. Alkaline nitrogen content in the product； 2. Temperature rise in bed layer I ； 3. Bed pressure drop.