Method and System for Processing Gasoline Fractions

A method for processing a gasoline fraction, comprising the steps of:

• I) reacting the gasoline fraction in an aromatization unit and separating the resulting reaction product to obtain a C4− component, a C5 component, a C6-C7 component, a C8 component and a C9+ component, wherein the reaction occurring in the aromatization unit includes aromatization reaction;
• II) reacting the C6-C7 component and the C9+ component from step I) in a cracking and aromatics conversion unit, and separating the resulting reaction product to obtain a C4− component, a C5 component, a C6-C7 component, a C8 component and a C9+ component, wherein the reaction occurring in the cracking and aromatics conversion unit includes non-aromatics cracking reaction and transalkylation reaction;
• III) optionally, purifying at least one of the C8 components from steps I) and II), and separating the resultant to obtain a C4− component, a C5 component, a C6-C7 component, C8 aromatic hydrocarbon(s) and a C9+ component;
• IV) optionally, subjecting at least a part of at least one of the C4− components from steps I), II), and III) to steam cracking or dehydrogenation reaction;
• V) optionally, using at least a part of at least one of the C8 components from steps I), II), and III) for gasoline blending;
• and
• VI) recycling the C6-C7 component and the C9+ component from step II), and optionally at least a part of at least one of the C6-C7 component and the C9+ component from step III), to the cracking and aromatics conversion unit of step II) for further reaction.