Technical Article

Enhance Aromatics Production

With Concurrent Reduction of Environmental Footprint - Part 1

Thumb_Axens_TA_Enhance aromatics production part 1_EN

Catalytic reforming processes produce olefin contaminants in aromatics streams via paraffin dehydrogenation side reactions. Operating catalytic reformers at higher severity results in higher yields of valuable aromatics, but it also results in higher olefins content in the reformate.

Olefins must be removed from:

  • C6-C7 aromatics streams to meet benzene product specifications,
  • and from C8+ aromatics streams to meet specifications for paraxylene recovery processes.


Historically, olefins have been removed from aromatics streams in treaters using activated clay to promote the acid alkylation of olefins with aromatic molecules, thereby producing heavier compounds further separated by fractionation.

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Technical Article

Enhance Aromatics Production with Concurrent Reduction of Environmental Footprint - Part 2


Part 1 of this article presented key features and performances for the olefins selective hydrogenation process, and options for its implementation in an aromatics plant block flow diagram. It also described the benefits of selective hydrogenation addition to an existing facility. The benefits of selective hydrogenation integration in a grassroots facility are addressed in part 2.


Catalytic Reforming - A Comprehensive Overview


Since the early 1940s, dual function catalysts have been converting lower octane, naphtha-range hydrocarbons into aromatics and higher octane blend stock for petrochemical and gasoline production while producing valuable hydrogen as a by-product.