Separations

Phase Behavior of Gases in Ionic Liquids

Conference Presentation
AIChE Annual Meeting
Tuesday, November 5, 2013 - 3:15pm-3:30pm
This presentation will emphasize the importance of characterizing the global phase behavior of gases in ionic liquids and how this can provide...

Chromatographic Scale-Up On a Volume Basis

Conference Presentation
AIChE Annual Meeting
Tuesday, November 5, 2013 - 8:30am-9:00am
The scale-up of a chromatographic separation is in principle a simple procedure since the process parameters are scalable in a linear fashion. The...

The Potential Of Osmotic Membrane Dehumidification

Conference Presentation
AIChE Annual Meeting
Monday, November 4, 2013 - 4:00pm-4:15pm
THE POTENTIAL OF OSMOTIC MEMBRANE DEHUMIDIFICATION Arthur Kesten, Jeffrey McCutcheon, Ariel Girelli and Jack Blechner An osmotic membrane...

Column Revamps

Conference Presentation
Southwest Process Technology Conference
Thursday, October 3, 2013 - 1:30pm-4:30pm
Distillation and absorption columns sometimes need to be revamped to achieve capacity increases, separation improvements or energy consumption...

Challenges and Opportunities in Oil Fields Produced Water Treatment

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Wednesday, May 1, 2013 - 8:00am-8:30am
Produced water treatment composition varies all over the map and requires specific unit processes and unit operations with each and every site...

Development of Heat Exchangers for Use As Replacement Plates

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Tuesday, April 30, 2013 - 4:30pm-5:00pm
Development of Heat Exchangers for Use as Replacement Plates In Distillation Columns: Proof of Concept and Collection of Design Information 2 Graham...

Gas Cleanup Using Elastic Layered Metal-Organic Framework Adsorbents

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Tuesday, April 30, 2013 - 9:00am-9:30am
The suitability of elastic layered metal-organic frameworks (ELM) for the removal of carbon dioxide from methane-rich gas mixtures was evaluated...

Scale-up of SAPO-34 Membranes for CO2/CH4 Separation

Conference Presentation
AIChE Annual Meeting
Monday, October 29, 2012 - 9:30am-10:00am
SAPO-34 membranes have pores with a diameter of approximately 0.38 nm and have the potential to be used for large scale removal of CO 2 impurities...

The Mixed Matrix Membrane Story

Conference Presentation
AIChE Annual Meeting
Monday, October 29, 2012 - 9:00am-9:30am
The talk will highlight the evolution of Mixed Matrix Membranes (MMM), developed in the mid-1980s. The talk will first provide an introduction into...

The Rayleigh Equation Revisited What to Do When Alpha Isn't Constant

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Wednesday, April 4, 2012 - 12:00am
Abstract Integration of the Rayleigh Equation for batch distillation in closed analytical form has heretofore required that relative volatility (α)...

Root Cause Study of Debutanizer Column Operational Upsets

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Tuesday, April 3, 2012 - 12:00am
The NOVA Chemicals Debutanizer Column at the Corunna site experienced operational upsets. Gamma scans revealed that the column had flooded, and upon...

Dynamic Simulation of Demethanizer and Chilling Train System

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Monday, April 2, 2012 - 12:00am
The chilling train system is an important part of ethylene plant which is usually combined with demethanizer and a series of flash drums to separate...

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...

A Century of Separations: CO2 Recovery: Myth and Legend

Conference Presentation
AIChE Annual Meeting
Thursday, November 20, 2008 - 2:00pm-2:30pm
Carbon dioxide recovery will be the major challenge for the separations community for the foreseeable future. Various separations technologies are...

Use Quantitative Gamma Scans to Troubleshoot Maldistribution on Trays

February
2013
Reactions and Separations
Henry Z. Kister
Quantitative, multichordal gamma-scan analysis is invaluable for diagnosing maldistribution and channeling in distillation columns. The graphical tool introduced here is a convenient way to visually represent the data.

Revive Your Columns with Cyclic Distillation

December
2015
Reactions and Separations
Costin Sorin Bîldea, Anton A. Kiss
This process intensification technique involves changing a tower’s internals and operating mode and the separate movement of the liquid and vapor phases. This can significantly increase column throughput and reduce energy requirements, while improving separation performance.

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.

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-...

Ten Distillation Revamp Pitfalls to Avoid

February
2014
Back To Basics
Doug Bouck
Projects aimed at improving distillation column operation may encounter a variety of hurdles. This article looks at ten common problems and provides guidance on how to avoid them.

Realistically Predict Capacity and Pressure Drop for Packed Columns

July
2007
Reactions and Separations
Emil Abkar, Khashayar Afshar, Henry Z. Kister, Jeffrey Scherffius
Generalized pressure-drop correlation (GPDC) charts have been the standard for predicting packing flood points and pressure drops. This article guides engineers on the correct and incorrect uses of the GPDC interpolation procedure, and updates the...

Troubleshooting Distillation Simulation

June
2006
Reactions and Separations
Stanislaw K. Wasylkiewicz
A tool called azeotrope pressure sensitivity analysis (APSA) can shed light on the dependence of an azeotrope's composition and temperature on changes in pressure.

Diagnosing Maldistribution in Towers

May
2007
Reactions and Separations
Simon X. Xu
Gamma CAT-scan technology makes possible the collection of much more vital online process information than conventional diagnostic techniques.

Be Smart about Column Design

November
2012
Reactions and Separations
Daniel R. Summers, P.E., Mark Pilling, P.E.
Optimizing distillation equipment and processes can improve both the profitability and the greenness of an operation.

Distillation Troubleshooting

March, 2006
The last half-century of research on distillation has tremendously improved our understanding and design of industrial distillation equipment and systems. High-speed computers have taken over the design, control, and operation of towers. Invention and innovation in tower internals have greatly...

Solid-Liquid Separation: A Guide to Centrifuge Selection

July
2012
Back To Basics
Tom Patnaik
Centrifugation is a necessary step in many pharmaceutical and chemical production processes. These guidelines will help chemical engineers better understand the process of centrifuge selection.

CEP: AIChE Journal Highlight - A New Spin on Separations

September
2012
Journal Highlight
The microelectronics industry has been revolutionized by technologies that boast ever-increasing capabilities in increasingly smaller areas. Now, the ability to pack high functionality into smaller devices is poised to transform the chemical process...

Design and Control of Distillation Systems for Separating Azeotropes

March, 2010
Hands-on guidance for the design, control, and operation of azeotropic distillation systems Following this book's step-by-step guidance, readers learn to master tested and proven methods to overcome a major problem in chemical processing: the distillation and separation of azeotropes. Practical in...

Oxygen and Nitrogen: Onward and Upward

January
2009
News Feature
Suzanne Shelley
Innovative advances continue to benefit all three of today's air separation technologies, helping to reduce power consumption and capital costs, and, in turn, expand their markets.

Improving Reverse Osmosis Performance

September
2010
Reactions and Separations
Loraine Huchler
Follow these guidelines for monitoring, evaluating, and troubleshooting RO units to ensure reliable and efficient system operation.

Converting a Commercial Distillation Column into a Research Tower

July
2005
Reactions and Separations
Ralph Weiland
Operating a column under actual distillation conditions is important for obtaining commercially valid hydraulic data. This article describes how a column was modified to operate in either a production or a research mode to collect hydraulic and mass...

Choosing Trays and Packings for Distillation

September
2009
Back To Basics
Bruce S. Holden , Mark Pilling
Tower-related problems can be difficult, time-consuming, and expensive to diagnose and fix. Here’s how to avoid difficulties and improve operating efficiency.

Optimize Energy Use in Distillation

March
2012
Reactions and Separations
Douglas C. White
Nonlinearities in the response of a column to changes in operating conditions and in common economic valuation functions can have significant impacts on the economic optimum energy consumption for the column. Here’s a way to account for such...

Preventing Maldistribution in Multi-Pass Trays

April
2010
Reactions and Separations
Richard Dionne, Henry Z. Kister, Matthew R. Olsson, Walter J. Stupin
This method, based on hydraulic equations in the open literature, calculates vapor/liquid distribution in four-pass trays to correctly predict flooding and efficiency.

Ensure Proper Design and Operation of Multi-Pass Trays

June
2005
Reactions and Separations
Mark Pilling
To function properly at optimum capacity and efficiency, multi-pass trays must be designed so that the liquid and vapor flows are properly balanced. This article provides guidance on how to achieve that.
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