Solutions to two senior reformation technician exam questions
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1. Raise the initial boiling point of the reformation feedstock； It has little impact on the yield of gasoline, but it can increase its octane rating. 2. Excessive water content in the catalyst leads to phenomena such as a decrease in total temperature, a decline in the purity of the recycled hydrogen, and a reduction in the liquid yield. PS: What is the impact of the initial boiling point on the reforming feed? Why is there a difference between catalyst \"over-wetting\" and \"chlorine deficiency\", and why does the temperature drop decrease?
Lowering the initial boiling point of the raw materials mainly refers to C6; compounds such as cyclohexane and n-hexane are converted into benzene, and the octane rating indeed increases. Pentane shows no reaction. Excess water causes the platinum to become hydrothermally deactivated.
1. In the produced oil, C8 contributes the most to the octane number. 2. A high water content can lead to chlorine loss; poor coordination between the catalyst’s acidic and metallic functions results in a decrease in its activity. During the reforming process, the water-chlorine balance is an important indicator for maintaining the activity of the reforming catalyst. However, in practical operations, imbalances in this water-chlorine balance can occur due to changes in the feedstock, as well as variations and fluctuations in the conditions of upstream feedstock processing. Excessive moisture refers to a water content in the raw materials and recycled hydrogen that exceeds the allowable limits. However, excessive 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 occurs only if no chlorine replenishment is carried out. If the moisture level is too high, it is necessary to identify the cause, and then add chlorine based on the amount of chlorine that has been lost. Also, too low a water content is not suitable.