December 2017

Process Optimization

Maximizing energy efficiency in paraxylene production—Part 1

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.

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. Part 1 will review the energy-efficient process design principles that are widely used in aromatics processing.  In Part 2, case studies will be presented 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. Past literature has shown that crystal

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