The issue of feedstock for catalytic reforming
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This post was last edited by sxf1028102800 on 2024-9-6 at 17:15. I have a question: the feedstocks for catalytic reforming include straight-run naphtha and reprocessed naphtha. If reprocessed naphtha is to be used as a feedstock for catalytic reforming, does it need to be processed in another hydrogenation unit first before being used as a reforming feedstock? The coker naphtha from our plant is first hydrogenated in a gasoline/diesel hydrotreating unit; the hydrogenated naphtha then serves as a reforming feedstock. Can it be used directly as a reforming feedstock? (Our plant’s reforming unit is equipped with a pre-hydrotreating unit.) Those who know, please share. Thanks
Yes, recycled naphtha usually needs to undergo hydrogenation first to reduce the content of impurities such as sulfur and nitrogen and improve its quality before it can be used as a feedstock for catalytic reforming. Your plant’s approach is correct: it is feasible to first process coker naphtha through a gasoline and diesel hydrogenation unit, and then use the hydrogenated naphtha as feedstock for catalytic reforming. Especially since the reforming unit you mentioned has a pre-hydrogenation function, this can further ensure the quality of the feedstock and improve the efficiency of the reforming process. .
Reprocessed naphtha has a high content of unsaturated olefins. 1. Direct pre-hydrogenation in the reforming unit can lead to the condensation of olefins, resulting in the formation of gums that clog the equipment and catalyst beds ； 2. Moreover, the hydrogenation of unsaturated olefins releases a large amount of heat, which can cause the catalyst bed temperature to rise rapidly; therefore, in advanced hydrogenation units, saturated olefins are…
Recently, I have learned about new approaches to development; in reforming processes, it is possible to first carry out fractionation, then proceed with reforming in separate groups, and finally conduct fractionation again. This approach can significantly reduce the cost and investment required for reaction equipment. After all, in a reforming reaction, only some components react.