AIChE

Exploring Instrumentation Alternatives

September
2008
Instrumentation
Robert Baker
Salvaged, remanufactured, refurbished or new-surplus equipment may be a cost-effective option. Here's how to recognize when such devices may no longer meet safety or regulatory requirements.

Should Your Organization Fly Warning Flags?

December
2009
Safety
Ian Sutton
In the safety culture of some companies, the first recognition of trouble may be a sudden and massive failure. Learn how to decipher the warning signals to avoid safety incidents. <BR><BR>

Agitating Fibrous Materials

June
2010
Back To Basics
Gregory T. Benz
Slurry agitation involves complicated processes. This article presents guidelines for understanding the rheology of cellulosic and other fibrous materials, and outlines a method for scaling up their agitation.

Process Synthesis: Poised for a Wider Role

April
2001
On The Horizon
W. R. Johns
Software for generating process designs has made relatively limited inroads so far. But, it now is set to follow simulation and become a tool routinely used by chemical engineers.

Screening Reactive Chemical Hazards

May
2006
Safety
Yen-Shan Liu
Use these tools to identify potentially reactive chemical hazards and avoid the expense of conducting numerous detailed hazard assessments.

Plant Security Remains a Moving Target

May
2008
News Feature
Cynthia F. Mascone
While chemical companies work toward complying with existing standards, legislators are poised to revise those very rules — with changes ranging from minor tweaking to major overhaul on the table.

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...

Create Effective Process Safety Moments

May
2010
Safety
Deborah Luper
Process safety topics are underrepresented in safety communications. Here are ideas on how to convey your organization’s safety priorities in messages tailored to the audience.

Saving Energy in Multilevel Steam Systems

January
2012
Back To Basics
Wiroon Tanthapanichakoon
Avoid some common pitfalls by taking this holistic approach when implementing projects to reduce the consumption of steam.

Use Logic Diagrams to Analyze Failure Mechanisms

June
2005
Safety
Thiago Tinoco Pires
Here’s how to construct and apply continuous-value and single-value network diagrams, which can better represent system failure mechanisms than other logic diagrams.

What’s New Then and Now - Part 1

November
2008
Centennial
Matthew McKeon-Slattery
This special products section looks at some of today’s equipment and service offerings alongside product write-ups and ads from the past.

Process Simulation from the Ground Up

April
2009
Back To Basics
David Hill
Today's process simulators produce graphical, data-filled and detailed results that can improve the effectiveness of the engineers who use them.

Managing Transportation Safety and Security Risks

October
2009
Safety
Brad A. Fuller
Effective transportation risk management (TRM) balances safety and security with operational efficiency. When developing a TRM program, use this comprehensive framework and these practical techniques to identify and screen risks.

Prepare for a Different Future

February
2001
Opinion
Calvin B. Cobb
The U.S. industrial landscape is changing dramatically. This has significant implications for our profession and individual chemical engineers.

Controlling NOx Emissions - Part 1

March
2002
Environmental Management
Mike Bradford
NOx emission standards are becoming very tight, especially in the Houston area and in Southern California. Among the technologies to meet these standards are process modifications and energy efficiency improvements, as well as advanced burner...

Simplify Reliability Analysis of Chemical Processes

July
2002
Safety
Farshad Nourai
Originally developed for discrete manufacturing, this method can be applied to process units to detect which components may fail, and correct the situation before trouble happens.

Understand the Capabilities of Bio-Oxidation

December
2002
Environmental Management
James T. Boswell
Relatively uncomplicated design and simple operation and maintenance requirements make biofiltration a good option for many types of air emissions control.

Selecting In-Process Particle-Size Analyzers

August
2003
Fluids and Solids Handling
Paul Barrett
To select the proper instrument for process monitoring, one must determine what attribute of the particle system impacts the process or product parameter of concern. Once the size region is identified, it can be tracked in-process, opening up the...

Reliability for Safety Instrumented Systems

September
2004
Instrumentation
J. Patrick Williams
This article offers a detailed reliability-based methodology for determining the safety integrity level of instrumented systems by providing overpressure protection where arrangements of multiple pressure-relief valves are impractical to implement.

Keeping the Competitive Edge

June
2007
Special Section
Lise Laurin
Applying the total cost assessment (TCA) methodology, which accounts for intangibles, provides a more complete evaluation of costs and benefits with the risks associated with them.

RFID - Rx for Drug Security?

February
2008
News Feature
Gerald Parkinson
Some pharmaceutical companies are turning to radio frequency identification to protect against counterfeiting and theft of expensive drugs.

CEP: Institute News

July
2012
Institute News
Focusing on the 2012 Institute elections, this issue features candidate platforms.

Polysilicon Business Shines Brightly

August
2008
News Feature
Gerald Parkinson
To meet growing demand for solar energy, new polysilicon plants are being built at an unprecedented rate, and several new technologies will play a role in the capacity expansion.

Will IST Stall CFATS Reauthorization?

August
2010
News Feature
Matthew McKeon-Slattery
Debate over the Chemical Facility Anti-Terrorism Standards continues to revolve around whether manufacturers and processors will be required to incorporate inherently safer technology into their security plans.

Reduce Thermal Risk in Industrial Synthesis

October
2001
Safety
Richard C. Wedlich 
Knowing the safe operating conditions for a reaction allows us to select appropriate safety measures and thereby lower both the likelihood and the severity of a thermal runaway.

CEP: Chem Economics - Plastic Additives are Poised for Growth

July
2012
Chem Economics
T. Kevin Swift
Not all polymers are useful and/or processable in their natural form. Thus, functional chemicals are added to polymer resins to facilitate processing and to enhance, extend, or otherwise modify the properties of the plastic products manufactured from polymer resins. Such plastic additives represent a $4.6-billion business in the U.S.

Estimate Storage Tank Emissions

August
2001
Environmental Management
Jimmy  Peress
Use this shortcut to quickly determine emissions from fixed-roof storage tanks.

Controlling NOx Emissions - Part 2

April
2002
Environmental Management
Mike Bradford
NOx reduction technologies include selective catalytic reduction, selective noncatalytic reduction, and catalytic oxidation/scrubbing.

Disinfect with Sodium Hypochlorite

March
2003
Safety
Anton G. Callery
Sodium hypochlorite is an effective alternative to chlorine gas. Follow these guidelines for its safe use.

Understanding Sealing Solutions

July
2009
Back To Basics
Jim Drago
The right seal can help a plant save money, eliminate leaks, and avoid safety problems. Here’s how to select and install gaskets for effective sealing.

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
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.

Addressing Combustible Dust Hazards

May
2011
Back To Basics
Judy Perry
Facilities that handle or generate dusts are at risk for explosions and flash fires. Follow this approach to understand and mitigate your combustible dust hazards.

Prepare Your Cooling System Before Startup

July
2012
Heat Transfer
Paul R. Puckorius
Pre-startup actions such as initial water treatment and equipment coatings in cooling tower water systems can increase system life expectancy and efficiency, and reduce corrosion and fouling.

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.

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.

Applying Mass and Energy Balances to Spray Drying

December
2009
Back To Basics
Tim Langrish
Mass and energy balances are not just for process and equipment design. They can also be used to improve dryer operations by answering various “what-if” questions about temperatures, flowrates, and moisture contents. <br><br>

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.

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.
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