What is the difference between \"over-wetting\" and \"chlorine deficiency\" in continuous reforming catalysts?

During the reforming process, the water-chlorine balance is an important indicator for maintaining the activity of the reforming catalyst. However, in practical operations, an imbalance in this water-chlorine balance may occur due to changes in the feedstock, as well as variations and fluctuations in the conditions of upstream feedstock processing. Excess moisture refers to a water content in the raw materials and recycled hydrogen that exceeds the allowable limits. However, excess moisture does not necessarily lead to the removal of chlorine; what is certain is that it accelerates the rate at which chlorine is lost. Chlorine deficiency only occurs if no chlorine replenishment is carried out. If the area is too wet, the cause must be identified first, and then chlorine should be added based on the level of chlorine loss. Also, too low a water content is not suitable.

Both excessive moisture and chlorine deficiency lead to a decrease in the chlorine content on the catalyst and a decline in its acidic properties; however, in an environment with excessive moisture, water also contributes to acidic effects, and that is the difference

Excessive moisture refers to a high water content; the presence of water is similar to diluting chlorine, which leads to a decline in acidic functionality. At the same time, due to the high water content, it affects the structure of the catalyst as well as the desorption process, resulting in a slight decrease in the metal’s functionality as well. . . Chlorine deficiency refers to a low level of chlorine; as a result, the amount of acidic functional groups decreases, and acidity naturally declines. Chlorine deficiency only affects acidity