AIChE | The Global Home of Chemical Engineers

Legionella: An Invisible Risk

April
2008
News Feature
Cynthia F. Mascone
Ignoring this hidden hazard can put both the public and companies that operate cooling towers at risk.

Evaluating Chiller Performance

May
2003
Heat Transfer
Charles Churchman
Use these simple temperature and flow measurement techniques to evaluate chilled-utility performance and identify the most cost-effective upgrades.

A ChE's Guide to Toxicology

June
2004
Environmental Management
Lisa M. Sweeney
Toxicology impacts a chemical engineer in a variety of ways. Here's what you need to know about the basics of this field.

Predesign with Safety in Mind

July
2006
Safety
Gael D. Ulrich, Palligarnai T. Vasudevan
This article will help you develop strong safety instincts that will guide you in making critical decisions in the preliminary design phase.

Controlling Risk During Major Capital Projects

April
2009
Safety
William Bridges
Think of process safety management (PSM) as a project deliverable, and follow these best practices for scheduling and performing process hazard analyses (PHAs) and completing other PSM requirements during key phases of a major project.

Clean Up Contaminated Sites

January
2002
Environmental Management
Faisal I. Khan
Risk-based monitored natural attenuation effectively monitors the extent of contamination, the associated risk, and the effectiveness of natural clean-up processes.

Estimate Emissions from Vacuum Operations

May
2002
Environmental Management
Jimmy Peress
This article compares empirical methods and test methods for determining air-leakage rates and offers guidelines on their use.

Conduct an Effective Incident Investigation

September
2004
Safety
Frederick T. Dyke
Information that can reveal the root cause of an incident resides in many places — within the plant or process unit, in control rooms and offices, and even in witnesses’ minds. Here’s how to find the data and conduct effective witness interviews.

Measuring Temperature by Indirect Means

November
2011
Back To Basics
Gary Freemer
Noncontacting infrared thermometers can be used in many applications that are too harsh or impractical for thermocouples and resistance temperature detectors. Understand their principles of operation and their advantages and limitations to select...

CEP: YPOV - Engineering Cyber Security

July
2012
YPOV
Arjun Gopalratnam
Between March and April 2010, a powerful but seemingly limited computer worm, now referred to as Stuxnet, infected computers around the world, beginning in Iran and spreading to Indonesia and India. A recently published book uncovers findings on the origin of the worm and raises concerns that are relevant to chemical engineers everywhere.

Specifying Laser Scanning Services

May
2005
Plant Design
Eric Hoffman
Increasingly, project managers are called upon to employ laser scanning technology. However, little information available to aid with its specification. This article discusses the basics of laser scanning and the parameters that should be included...

Create Business Value Through Process Modeling

September
2007
Management
Bernard McGarvey
As businesses strive to improve productivity, process modeling can be a powerful tool. This article explores the role of modeling in enhancing the effectiveness and efficiency of process development and manufacturing.

Use Case Histories to Energize Your HAZOP

March
2001
Safety
Glenn  Mahnken
Reviewing incident reports at a HAZOP meeting is more than just a lessons learned activity. It can spur sharper thinking and lead to a more telling analysis of your processes.

Correctly Calculate the Potential to Emit

December
2001
Environmental Management
Janet Scheier
Determining maximum capacity and ensuring that permit limits are federally enforceable are critical to calculating PTE.

Tackling the Human Challenges of Facility Security

February
2006
Safety
Dennis A. Attwood, Bill Effron
The increased complexity of security systems may come at the expense of the user. Thus, they must be designed to match their operators' capabilities and limitations.

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.

Process Safety Beacon - Emergency Preparation - The Titanic Disaster

July
2012
Process Safety Beacon
More than 1,500 people died in the most famous maritime disaster in history. Thousands of pages have been written about the loss of the Titanic, and many documentary and fictional movies produced. Many focus on the construction of the ship and the actions of its captain and crew. Whatever the construction and operating issues, attention to one particular issue could have saved many lives — emergency preparation.

Don't Let History Repeat Itself

August
2007
Safety
John F. Murphy, P.E.
Heed these lessons learned from investigations conducted by the Chemical Safety and Hazard Investigation Board to prevent accidents at your site.

Grand Challenges for Engineering

April
2008
News Feature
Gordon Ellis
Twentieth-century engineering enabled life as we know it. The National Academy of Engineering looks at what is needed in the future.

Determine the Optimum Number of Process Trains

January
2010
Back To Basics
Gregory T. Benz
This article demonstrates that the repair and expense costs of process trains are not proportional to their capital costs and that, in most cases, building one plant with a single process train is the most economically efficient choice. <br>...

Remember Hand Protection

January
2005
Safety
Laura Randall
Setting up a hand-protection program involves understanding the hazards, choosing the appropriate glove, training personnel on glove use, and ensuring that employees use their gloves properly.

High-Shear Mixers: Still Widely Misunderstood

November
2007
News Feature
Suzanne Shelley
Advanced modeling techniques and improved geometric features are helping designers and users of rotor-stator mixers to demystify these complex devices, and get more consistent predictable results.

Understanding Operating Data

October
2009
Back To Basics
Tony Cooper
Operating data offer valuable clues and are essential to managing and improving processes.However, they can also be misleading and hide the underlying issues.The principles and statistical tools presented here can help you make effective use of...

Use Multivariable Transmitters to Improve Flow Measurement

October
2010
Instrumentation
Nathan D. Stokes
Advances in multivariable transmitters allow more-accurate and more-repeatable flow measurements to be made over a wide range of conditions. Here’s how to select the device with the right capabilities for your applications.

Develop Effective Environmental Training

September
2001
Environmental Management
Peter J. Stoll
Computer-based environmental compliance training offers a number of advantages. This article discusses the benefits of computer-based training, outlines its most important components, and provides tips for structuring and writing a course.

Radical Designs Boost Resource Efficiency

July
2010
News Feature
Joanna Ziemlewski
The top projects in the recent 10xE Design Challenge showcase the best examples of resource-efficient, integrative design from the chemical engineering community.

Destroying Organic Wastes: Thermal Oxidizer Basics

May
2005
Environmental Management
Yehuda Goldshmid
This article describes the types of oxidizers, outlines the parameters that affect oxidizer choice, and provides guidance on specifying a thermal oxidizer system.

Understanding Electromagnetic Flowmeters

May
2010
Instrumentation
Ronald W. DiGiacomo
Consisting of a flow tube, field-generating coils, electrodes, and a transmitter, a magmeter accurately measures the flowrate of conductive fluids over a wide range of conditions.

Reduce VOC and HAP Emissions

June
2002
Environmental Management
Edward C. Moretti 
Follow this roadmap to understand the abatement technologies available for controlling emissions of volaitle organic compounds and hazardous air pollutants and the criteria for choosing among them.

Addressing the Hazards of Data Omission from MSDSs

April
2005
Safety
James C. Mulligan
If certain chemicals lack physical hazards data, suppliers must be proactive to keep workers safe. Here’s how to determine dust flammability and reactivity data for inclusion on MSDSs.

Designing Resilient Engineered Systems

April
2006
Safety
Susan M. Mitchell
By viewing resiliency as a property of complex systems, it may be possible to develop resilient systems that can withstand unanticipated failures without disastrous consequences.

Co-Inventors: Who Owns the Patent Rights?

June
2012
Patent Update
M. Henry Heines
A joint invention arises from the combined efforts of two or more inventors. Once a patent is granted, however, the inventors do not necessarily share in the rewards.

Choose the Right Chemical-Resistant Glove

January
2005
Safety
Julie Copeland
Many gloves offer protection from chemicals. This article will help you understand what type of glove can provide the best protection for your application.

Consider Natural Hazards in Process Safety Management

July
2008
Safety
Frank F. Liserio Jr.
Incorporating hurricanes, earthquakes and other forces of nature into an integrated process safety management (PSM) program can enable you to effectively identify these hazards and manage the risks.

Tracking Trends in Undergraduate Enrollment

November
2008
Centennial
R. Russell Rhinehart
By understanding the normal enrollment swings, employers and students can capitalize during the boom times and rideout the busts, while universities can allocate resources more effectively.

Designing a Process Flowsheet

May
2009
Back To Basics
Vornel Walker
Piping and instrumentation diagrams belong to a family of flowsheets that includes block flow diagrams and process flow diagrams. Technology advances have transformed these resources into intelligent documents, capable of storing layers of digital...

Profiles

January
2002
Special Section
Margaret Clarke Hunt
These profiles of a dozen engineers in different stages of their careers offer snapshots of where chemical engineers are employed.

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