January 2018

Process Optimization

Maximizing energy efficiency in paraxylene production—Part 2

Due to reduced margins, higher energy costs and rising atmospheric carbon dioxide content, energy efficiency has never been more important in refining and petrochemicals. This is particularly true in the modern aromatics complex, which produces paraxylene (pX), benzene and other aromatics from naphtha.

Colling, C., BP AMOCO

Due to reduced margins, higher energy costs and rising atmospheric carbon dioxide (CO2) content, energy efficiency has never been more important in refining and petrochemicals. This is particularly true in the modern aromatics complex, which produces paraxylene (pX), benzene and other aromatics from naphtha.  In Part 1 of this two-part series, energy-efficient process design principles that are widely used in aromatics processing were reviewed. This work provides case studies on pX manufacturing by crystallization and selective adsorption—the two principle pX manufacturing methods—to show how to maximize energy efficiency in pX manufacturing and the aromatics complex.  CASE STUDIES The ar

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