【Daily Question No. 287】October 20, 2018
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【Daily Question No. 287】October 20, 2018: Briefly describe some issues that should be considered when using catalysts. a. Prevent the reduced or sulfided catalyst from coming into contact with air. b. Avoid excessive contact between catalytic poisons and the catalyst. c. Prevent the catalyst bed from overheating. d. Maintain appropriate operating conditions, with the hydrogen-to-oil ratio being a key factor. e. Keep the rate of temperature and pressure increase slow; sudden changes in the temperature of the catalyst bed can cause the catalyst to break down. (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
1) Prevent the reduced or vulcanized catalyst from coming into contact with air； 2) Avoid extensive contact between catalytic poisons and the catalyst ； 3) Prevent overheating of the catalyst bed ； 4) Maintain appropriate operating conditions, among which the hydrogen-to-oil ratio is a key factor ； 5) Maintain a slow rate of temperature and pressure increase; sharp fluctuations in the catalyst bed temperature can cause the catalyst to break down.
a. Prevent the reduced or vulcanized catalyst from coming into contact with air. b. Avoid excessive contact between catalytic poisons and the catalyst. c. Prevent the catalyst bed from overheating. d. Maintain appropriate operating conditions, with the hydrogen-to-oil ratio being a key factor. e. Keep the rate of temperature and pressure increase slow; sharp fluctuations in the temperature of the catalyst bed can cause the catalyst to break down.
a. Prevent the reduced or vulcanized catalyst from coming into contact with air. b. Avoid excessive contact between catalytic poisons and the catalyst. c. Prevent the catalyst bed from overheating. d. Maintain appropriate operating conditions, with the hydrogen-to-oil ratio being a key factor. e. Keep the rate of temperature and pressure increase slow; sharp fluctuations in the temperature of the catalyst bed can cause the catalyst to break down.
1. It contains impurities. Impurities can cause the catalyst to lose its catalytic activity. 2. Temperature. The temperature should not be too high or too low; too high a temperature will cause the catalyst to lose its catalytic activity, while too low a temperature also affects its catalytic activity... 3. Contact area. Increase the catalyst’s contact area as much as possible to achieve optimal catalytic activity.
a. Prevent the reduced or vulcanized catalyst from coming into contact with air. b. Avoid excessive contact between catalytic poisons and the catalyst. c. Prevent the catalyst bed from overheating. d. Maintain appropriate operating conditions, with the hydrogen-to-oil ratio being a key factor. e. Keep the rate of temperature and pressure increase slow; sharp fluctuations in the temperature of the catalyst bed can cause the catalyst to break down.
1) Prevent the reduced or vulcanized catalyst from coming into contact with air； 2) Avoid extensive contact between catalytic poisons and the catalyst ； 3) Prevent overheating of the catalyst bed ； 4) Maintain appropriate operating conditions, among which the hydrogen-to-oil ratio is a key factor ； 5) Maintain a slow rate of temperature and pressure increase; sharp fluctuations in the catalyst bed temperature can cause the catalyst to break down.
1) Prevent the reduced or vulcanized catalyst from coming into contact with air； 2) Avoid extensive contact between catalytic poisons and the catalyst ； 3) Prevent overheating of the catalyst bed ； 4) Maintain appropriate operating conditions, among which the hydrogen-to-oil ratio is a key factor ； 5) Maintain a slow rate of temperature and pressure increase; sharp fluctuations in the catalyst bed temperature can cause the catalyst to break down.
1) Prevent the reduced or vulcanized catalyst from coming into contact with air； 2) Avoid extensive contact between catalytic poisons and the catalyst ； 3) Prevent overheating of the catalyst bed ； 4) Maintain appropriate operating conditions, among which the hydrogen-to-oil ratio is a key factor ； 5) Maintain a slow rate of temperature and pressure increase; sharp fluctuations in the catalyst bed temperature can cause the catalyst to break down.
a. Prevent the reduced or vulcanized catalyst from coming into contact with air. b. Avoid excessive contact between catalytic poisons and the catalyst. c. Prevent the catalyst bed from overheating. d. Maintain appropriate operating conditions, with the hydrogen-to-oil ratio being a key factor. e. Keep the rate of temperature and pressure increase slow; sudden changes in the temperature of the catalyst bed can cause the catalyst to break down.
1. Impurities. Impurities can cause the catalyst to lose its catalytic activity. 2. Temperature. The temperature should not be too high or too low; too high a temperature will cause the catalyst to lose its catalytic activity, while too low a temperature results in reduced catalytic activity. 3. Contact area. It is necessary to increase the contact area of the catalyst as much as possible in order to achieve optimal catalytic activity.