Separations

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...

Distillation in Practice

Instructor-led (classroom) Course
This course covers all essential distillation concepts likely to be faced by process support, operations, and design engineering personnel. It covers...

Distillation Technology for Operators

eLearning (online) Course
Operators will gain an excellent understanding of the theory of distillation and how it works in a column, plus gain a solid foundation on the...

Crystallization Operations

Instructor-led (classroom) Course
Join crystallization expert Wayne Genck for a practical overview of the basics of crystallization and precipitation and how to apply the fundamentals...

Crystallization Process Development

eLearning (online) Course
Integrative approach for crystallization development. Using models to analyze the SLE behavior of the system, validating using relevant experimental...

Distillation in Practice

eLearning (online) Course
This course covers all essential distillation concepts likely to be faced by process support, operations, and design engineering personnel.

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.

Developing Crystallization Processes

March
2011
Reactions and Separations
Christianto Wibowo
With solid-liquid equilibrium as its foundation, this systematic approach makes it easy to identify operating regions and theoretical yield to maximize the desired product.

Understand the Basics of Membrane Filtration

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

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.

Understanding Crystallization and Crystallizers

October
2006
Fluids and Solids Handling
Ketan D. Samant, Lionel O'Young
Gain qualitative insight into the basic mechanisms of crystallization, the principles of crystallizer operation, and the ways in which these concepts relate to the selection and application of the various crystallizer configurations in industrial...

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.

Realistically Predict Capacity and Pressure Drop for Packed Columns

July
2007
Reactions and Separations
Emil Abkar, Henry Z. Kister, Jeffrey Scherffius, Khashayar Afshar
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...

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...

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.

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.

Using Chromatography to Separate Complex Mixtures

December
2010
Back To Basics
Nathalie Fraud
Purifying high-value mixtures, such as pharmaceuticals, can be an expensive undertaking. Choosing the correct chromatography methods can improve purity and reduce processing time and cost.

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...

Visualizing the McCabe-Thiele Diagram

December
2009
Reactions and Separations
Paul M. Mathias
Use this spreadsheet-based visualization and interactive analysis of the McCabe-Theile diagram to understand the foundations of distillation engineering. <br><br>

Accurately Predict the VLE of Thiol-Hydrocarbon Mixtures

September
2004
Reactions and Separations
Chorng H. Twu, Vince Tassone, Wayne Sim
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.

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.
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