Catalyst lifespan
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This post was last edited by yy1007 on 2010-11-24 at 18:47. How can the service life of a catalyst be extended as much as possible? What are the differences between its use in the later stages and its use in the initial stages?
Could the original poster be more specific: what type of catalyst? What limits its service life – poisoning and inactivation?
There are various mechanisms for catalyst deactivation, including carbon deposition, coking, poisoning, loss, and the need for washing during subsequent use
Prevent the reduced or activated catalyst from coming into contact with air； The raw material components must be of high quality and undergo purification; during use, it is necessary to prevent toxins from coming into contact with the catalysts ； Maintain stability in the normal operating process conditions (such as temperature, pressure, reactant ratios, and circulation flow rate), and minimize fluctuations as much as possible ； Strictly control the operating temperature to keep it within the allowable range for the catalyst, preventing localized overheating of the catalyst bed and thus avoiding damage to the catalyst. The catalyst exhibits high activity at the beginning of use, so the operating temperature should be kept as low as possible. As the activity declines, the operating temperature can be increased gradually to maintain stable activity ； When driving, maintain a slow increase in temperature and pressure; sudden changes in temperature and pressure can easily cause the catalyst to break down.
Hehe, the specific reasons require detailed analysis; the catalysts used in different industries vary, as do the requirements.