August 2019 CEP Preview

August 15, 2019

This month the future of hydrogen, a look at advances in distillation, uses for dynamic simulations, and much more.

Distillation Technology: What’s Next?

Back To Basics
José L. Bravo
Distillation is often described as a mature technology that is well understood and established, no longer requiring funding or attention from research and development. This thinking is flawed, as distillation has come a long way in the past three decades and has even more room to grow.

Can We Count on Good Turndown in Two-Pass Moving-Valve Trays?

Reactions and Separations
Matthew R. Olsson, Henry Z. Kister
At turndown, the efficiency of two-pass moving-valve trays may be lower than expected due to maldistribution of the vapor within the trays. This article explores this maldistribution and describes ways to alleviate it.

Use Downcomer Gamma Scans to Troubleshoot Your Process

Reactions and Separations
Henry Z. Kister, Chuck Winfield
Downcomer scanning can provide valuable information to diagnose your tower. In particular, these scans are useful for determining the mechanism of flooding — one of the most common problems encountered in distillation columns. Follow these guidelines to avoid pitfalls.

December 2018 CEP Preview

December 12, 2018

This month CEP looks at pharmaceutical manufacturing trends in addition to articles on electric heat tracing systems, process intensification, distillation tower inspections, and much more.

Crystallization Operations

Face-to-Face Course
A practical overview of the basics of crystallization and precipitation and how to apply the fundamentals of crystal growth and nucleation to...

November 2018 CEP Preview

This issue, essentials of job hazard analysis, a special section on energy-efficient manufacturing, including a 10-step process for energy analysis, and much more.

July 2018 CEP Preview

July 20, 2018

This month: revisiting the O'Connell correlation, commonly overlooked codes and standards for piping, tips for team motivation, and much more.

Predict Distillation Tray Efficiency

Reactions and Separations
Markus Duss, Ross Taylor
An empirical technique — the O’Connell correlation — is widely used to estimate the efficiency of cross-flow trays. This article proposes a modification and clarifies the relationship between the empirical and theoretical approaches.

Distillation in Practice

eLearning (online) Course
Learn essential distillation concepts including vapor liquid equilibrium, start-up and troubleshooting, and other best practices with this online...

January 2017 CEP Preview

January 9, 2017

This month CEP looks at troubleshooting, offers a feature on process safety management don'ts (read full text online), looks at air-cooled heat exchanger performance, and much more.

Bridge the Gap with Semicontinuous Distillation

Reactions and Separations
James R. Phimister ,  Warren D. Seider
This processing strategy combines the advantages of batch and continuous operation, providing flexibility and efficiency in a single design.

Real World Modeling of Distillation

Reactions and Separations
Harry Kooijman, Rajamani Krishna , Ross Taylor
Previously, simulations based on nonequilibrium, or rate-based, models were considered impractical due to their complexity. However, with ever-increasing computing power, these simulations are not only feasible, but in some circumstances they should...

Evaluating Distillation Column Performance

Reactions and Separations
AIChE’s Equipment Testing Procedures Committee, Tray and Packed Columns Procedure Revision Subcommittee
Follow these guidelines to assess the capacity and efficiency of distillation columns containing trays or packing.
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