Heavy oil catalytic catalyst problem
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Why are catalysts divided into balancing agents and what are the functions of fresh agents? Are their chemical compositions different? Please give me some advice from a catalytic expert.
Catalytic cracking unit balancing agent http://bbs.hcbbs.com/thread-331868-1-1.html
Fresh agent is the agent that has been purchased and unused, and balance agent is the agent that has been regenerated.
Thanks for the article on the second floor. I have some questions after reading it? Why should the catalyst be unloaded? Is it because its activity is not enough? Is the catalyst proportioned? That is to say, the balancing agent is continuously discharged during the production process. Continuous replenishment of fresheners? Is the freshener added directly to the regenerator? Don't bother me, I don't understand so I ask
There are special processes and equipment for loading and unloading catalysts. You can check the relevant processes. In normal production, a small automatic feeder is generally used for feeding. It is intermittent and automatically adds ingredients as needed. Fresh catalyst is added to the cold catalyst tank through a hopper, and equilibrium catalyst is discharged into the hot catalyst tank.
In normal production, unloading is sometimes necessary to maintain the normal catalyst storage capacity of the two vessels. The catalyst will slowly deactivate after being charred by high-temperature heavy metal pollution in the two vessels. Therefore, fresh agent must be added to the system through small feeds to maintain a certain catalyst activity.
The main reason for unloading the balancing agent during production is that the activity of the catalyst is insufficient. There are two aspects of deactivation: one is hydrothermal deactivation, and the other is poisoning deactivation. Unloading and adding agents are generally not continuous, but sometimes production needs to be continuous, but only within a period of time. Adding and unloading agents are all in the regenerator. In addition, the regenerator unloading agent can also be unloaded by adjusting the production plan.