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TRANSCRIPCIÓN DEL RESUMEN PUBLICADO POR EL EDITOR: The use of catalytic naphtha reforming as a process to produce high-octane gasoline continues to be important as it has been over the 55 yr of its commercial use. The catalytic reformer occupies a key position in a refinery providing high value-added reformate for the gasoline pool, hydrogen for hydroprocessing operations, and, frequently, benzene, toluene, and xylene aromatics for petrochemical uses. The main objective of catalytic reforming is to transform paraffins and naphthenes in naphtha to aromatics-rich products with as little ring opening or cracking as possible. Aromatics have very high octane numbers (>100) and can be tolerated in gasoline up to almost 50 vol%. However, because of stringent environmental regulations, the refining industry has taken significant steps to reduce the level of aromatic compounds in gasoline by adapting its formulation. Many countries have reduced the total aromatics content in gasoline from 4235 vol%. Naphtha feed to the reformer contains a mixture of C6C11 paraffins, naphthenes, and aromatic hydrocarbons in the temperature range of 85200°C. Most reformers process straight-run naphthas with qualities that vary significantly depending on the crude oil origin and boiling range.(1-3(1), (2), (3)) Typical straight-run naphtha contains 65 wt% paraffins, 20 wt% naphthenes, and 15 wt% aromatics. Cracked naphthas, such as visbreaker, coker, and heavy hydrocracked, are another source of reformer feeds. In motor gasoline applications, naphtha contains the full range of C6C11 components to maximize gasoline production. In petrochemical applications, naphtha feed may be adjusted to contain a more select range of hydrocarbons to maximize the production of aromatics. Currently, there are more than 700 commercial installations of catalytic reforming units worldwide with a total capacity of about 11.4 million barrels per day (b/d). Table 1 presents a worldwide distribution of catalytic reforming capacity.(4) About 40% of this capacity is located in North America followed by 20% each in Western Europe and Asia-Pacific region.