PROCESS FOR MAXIMIZING 371.DEGREE.+ PRODUCTION IN A FISCHER-TROPSCH PROCESS

摘要

A hydrocarbon synthesis (HCS) process wherein a Fisher-Tropsch reactor isoperated to maximize the selectivity to 371~C+ boiling fraction whileminimizing the production of less valuable products such as light gases (C1-C4), naphtha and diesel fractions. Inventive modes of operation to offset theeffects of catalyst deactivation and maximize selectivity to 371~C+ boilingfraction are utilized including (a) reducing gas inlet velocity to maintain anoptimal CO conversion level, (b) introducing additional active catalyst untila maximum loading is reached, and (c) increasing reactor temperature untilproductivity reaches a predetermined cut-off level.