April 2019

Process Engineering

Develop reactor internals for optimizing reactor design - Part 2: High-performance mixing chamber

Most hydroprocessing reactors are fixed-bed reactors comprising several catalyst beds that are divided by quench zones containing mixing chambers that introduce a vapor-quenching medium.

Ahn, E. S., Park, S. I., Song, I. C., Kim, G. B., Chang, G. S., GS Engineering and Construction

Most hydroprocessing reactors are fixed-bed reactors comprising several catalyst beds that are divided by quench zones containing mixing chambers that introduce a vapor-quenching medium. Poor quenching performance may damage the catalyst bed, shorten catalyst run length and promote excessive reaction affecting the overall process profitability. In this study, a major mixing chamber design is reviewed and verified by computational fluid dynamics (CFD) to suggest an optimal design for advanced quenching performance. The CFD results showed that the quench gas best enters the reactor via lateral-type distribution pipes with downward-facing holes, rather than a ring-type distribution pipe or hol

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