Separations

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Separations Division (SEP)

The SEP division provides technical programs for meetings with coverage of a variety of currently used and novel methods of separation. Division members can exchange knowledge of technical publications, computer programs, databases, separation research centers, networks and programs.

Trace Contaminant Removal in Petroleum Refining Processes

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
March 27, 2017
Adsorbents are widely utilized for trace contaminant removal in petroleum refining processes, including fluid catalytic cracking, catalytic reforming...

Distillation Trays as Mechanical Equipment

Archived Webinar
Dec 14, 2016
Further your understanding of the mechanics of vapor-liquid handling on the tray, how trays are laid out and installed, and how this knowledge helps to avoid common problems.

Sponsored Webinar: Optimizing Adsorption Process Design and Operation

Archived Webinar
Oct 29, 2014
This webinar describes new model-based approaches that allow the rapid and accurate design and operational analysis of complex adsorption cycles. Periodic adsorption processes, such as PSA or TSA, are widely used in industry as energy-efficient alternatives to cryogenic or absorptive separation...

Pressure Swing Adsorption: A Ubiquitous Gas Separation Technology

Archived Webinar
Aug 6, 2014
This webinar provides an overview of the ubiquitous pressure swing adsorption (PSA) technology. Adsorption is classified as a unit operation in chemical engineering that exploits the ability of a solid surface to concentrate species selectively from a fluid phase onto its surface. Adsorption...

Solid/Liquid Separation: Fundamentals and Applications

Archived Webinar
Jan 15, 2014
This webinar outlines a strategy for process owners and support personnel to guide design and insure tight integration of process properties and objectives with solid-liquid separation technologies.

New Materials for Membrane Separations

Archived Webinar
Mar 13, 2013
In this webinar, Dr. Richard D. Noble - the co-director of the NSF Industry/University Cooperative Research Center for Membrane Applied Science Technology and co-author of Membrane Separations Technology: Priniciples and Applications - discusses new materials for membrane separations.

The Science of Classifying Solids: Screening Technology

Archived Webinar
Dec 7, 2011
This webinar addresses the basics of screening, examining the fundamentals of screening: grade efficiency calculations, various aspects of probability of particle passage, and screening rate calculations.

Ionic Liquids

Archived Webinar
Aug 26, 2009
This webinar will cover the use of Ionic Liquids for both liquid and gas separations, emphasizing how the choice of anion, cation and functional groups can be used to tailor Ionic Liquids for specific separations.

The Ubiquitous Hydrocyclone Separator: Theory and Practice

Archived Webinar
Feb 10, 2009
The hydrocyclone separator, which was invented in 1891 (see E. Bretney, “Water Purifier”, U.S. Patent 453,105) is widely used in process engineering as a classifier, a clarifier, or a thickener. The continuous phase is a liquid and the dispersed phase may be a solid, a gas, or an immiscible fluid...

AIChE Journal Highlight: Microreaction Technology Comes of Age

March
2017
Journal Highlight
Microreaction technology has matured over the past two decades, from simple devices and concepts to diverse commercial equipment and applications. This evolution has occurred in parallel with process intensification efforts aimed at using...

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...

Catalyzing Commercialization: Sour Gas Has a Sweeter Future

January
2017
Catalyzing Commercialization
Many distributed natural-gas-containing resources, which include natural gas, landfill gas, and biogas, contain significant amounts of sulfur (mainly as hydrogen sulfide). The sulfur content in these gases, which can range from several hundred parts per million to several percent, must be reduced to acceptable levels (e.g., 1 ppm for demanding catalytic processes and several hundred ppm for internal combustion engines or boilers) before these gases can be utilized.

Use Downcomer Gamma Scans to Troubleshoot Your Process

January
2017
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.

Molecular Sieve Cracked Gas Dryer Tutorial

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
April 13, 2016
This tutorial provides an overview of adsorption technology. It will cover the following topics: adsorption phenomenon, structure and chemistry of...

February 2015 CEP Preview

February 18, 2015
Ethics Examining Your Engineering Responsibility Engineering ethics frequently has nothing to do with technology and everything to do with communication, thought and decision-...

November 2015 CEP Preview

November 16, 2015
This month, CEP's cover feature is liquid-liquid extraction, and members and non-members alike can read the full article online. See the preview for more about this month's issue.

May 2016 CEP Preview

May 13, 2016
This month, the CEP cover story takes a look at the advantages of fixed valves, while Back to Basics column gives smart tips for a successful energy assessment.

Impact of DDT on FPSO Explosion Risk Assessment

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
April 2, 2014
In recent explosion accidents on onshore petrochemical facilities, it has been concluded that a deflagration-to-detonation-transition (DDT) took...

Development of Heat Exchangers for Use As Replacement Plates

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
April 30, 2013
Development of Heat Exchangers for Use as Replacement Plates In Distillation Columns: Proof of Concept and Collection of Design Information 2 Graham...

Removal of Heavy Hydrocarbons from Lean Natural Gas

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
April 29, 2013
Removal of heavy hydrocarbons, such as C 6 + from natural gas is essential prior to cryogenic liquefaction in order to prevent freeze-out of these...

Bioseparation Basics

October
2014
Back To Basics
Roger G. Harrison
Bioseparations are critical to the field of biochemical engineering. Each bioseparation process must be tailored to separate, purify, or recover the desired bioproduct. This article gives an introductory overview of filtration and chromatography — two key bioseparation unit operations.

Optimizing Crystallizer Scaleup

June
2003
Fluids and Solids Handling
Wayne Genck
Explore how mixing parameters impact the crystallization process and recommend ways to improve the likelihood of successful scaleup. The concepts of nucleation and growth, types of mixing, design considerations, agitator parameters and scaleup...

Bridge the Gap with Semicontinuous Distillation

August
2001
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.

Design Principles for Liquid-Liquid Extraction

November
2015
Reactions and Separations
Joerg Koch, Glenn Shiveler
Many factors must be evaluated when developing a liquid-liquid extraction process. Here are some of the important parameters to consider as you go from laboratory testing to commercial-scale operation.

Understand the Basics of Membrane Filtration

April
2013
Back To Basics
Hua Wang, Hongyi Zhou
Membrane filtration is an integral part of many industrial processes, as it is often more environmentally sustainable and cost-effective than other separation technologies

Modeling Reactive Absorption

January
2009
Reactions and Separations
Eugeny Kenig, Panos Seferlis
Effective modeling of reactive absorption enhances system design, improves experiment planning for parameter-estimation, and facilitates process operation and control decisions.

Accurately Predict the VLE of Thiol-Hydrocarbon Mixtures

September
2004
Reactions and Separations
Wayne Sim, Vince Tassone, Chorng H. Twu
This methodology can be used to calculate vapor-liquid equilibria (VLE) between thiols and hydrocarbons at any composition, temperature or pressure to improve gasoline fractionation processes.

Producing Nitrogen via Pressure Swing Adsorption

June
2012
Reactions and Separations
Svetlana Ivanova, Robert Lewis
Pressure swing adsorption (PSA) can be a cost-effective method of onsite nitrogen generation for a wide range of purity and flow requirements.
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