Pre-treatment before catalytic reforming
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What consequences will occur if pre-hydrogenation is carried out before catalytic reforming, and if the pre-hydrogenation heater shuts down while the cycle hydrogen compressor continues to operate, the feed pump does not stop, starting up the furnace manually is not successful, and the operators on duty do not stop feeding in time? Why?
The temperature of the pretreatment reaction drops rapidly; the feed oil with high sulfur, high chlorine, and high metal content entering the reforming unit causes poisoning of the reforming catalyst, resulting in a rapid decrease in the temperature difference between the first and second reactors.
When the heating furnace is turned off, the temperature of the furnace drops rapidly, which causes the temperatures in each layer of the reactor to fall as well; as a result, the product does not meet the required standards. Additionally, this leads to an increase in the pressure difference across the layers. . .
What impact will that have on the catalysts?
Unqualified oil enters the reforming unit, and high impurities cause catalyst poisoning
If the impurity content is above the limit, it will enter the reforming reactor and cause catalyst poisoning and deactivation!