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AIChE | The Global Home of Chemical Engineers

Virtualizing Your Process Control Computers

January
2012
Instrumentation
Paul Hodge
By employing the latest virtualization solutions for process control systems, chemical plants can reduce PC hardware requirements, simplify system management, and lower the total cost of ownership, as well as improve site availability, reliability,...

Science on a World Stage

July
2008
News Feature
Gordon Ellis
The first annual World Science Festival takes Manhattan by storm, with 120,000 people celebrating scientific diversity.

Measuring Temperature by Direct Contact

September
2011
Back To Basics
Gary Freemer
Thermocouples and resistance temperature detectors are the most common contacting temp­erature sensors. Understand the techniques and apply them correctly to increase your temperature measurement accuracy.

Whatever Happened to the Class of 2009?

September
2009
News Feature
Gordon Ellis
Regardless of their current employment status and personal outlook, the new class of chemical engineering graduates is con?dent that they possess a unique versatility and capacity to make good and do good.

Classifying Reactive Chemicals

March
2004
Safety
M. Sam Mannan, Sanjeev R. Saraf, William J. Rogers
This simple classification scheme can be used to characterize the thermal instability risks posed by reactive chemicals in a process.

Audit Your New EHS Software System

October
2004
Environmental Management
Jill Barson Gilbert
A post-implementation audit of the environmental, health and safety management information system evaluates how well the software meets user needs and its value to the organization.

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.

Properly Purge and Inert Storage Vessels

February
2001
Safety
George R. Kinsley Jr.
Inert gases are used to prevent fires and explosions in the vapor spaces of equipment. Correct selection of oxygen concentration and inert gas flow rate are critical to ensuring safety.

Minimize Enforcement Penalties

July
2001
Environmental Management
Jessica L. Idzerda
Identify possible New Source Review/Prevention of Significant Deterioration penalties by conducting an internal audit and disclosing potential violations.

Preventing Pollution Around the World

November
2001
Environmental Management
J. J.  Rao
By implementing these strategies at all of its overseas facililities, an international corporation can reap such benefits as increased efficiency, reduced costs and a positive public image.

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.

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.

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.

Test Your Incinerator Knowledge

February
2003
Environmental Management
Richard J. Martin
Do you feel like you're in the dark? Take this quiz to find out how much you know about thermal oxidizer selection and operation.

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.

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.

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.

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...

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.

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.

Use Cloud Tools to Collaborate

July
2012
Career Catalyst
Loraine Kasprzak
Internet-based applications are changing the way chemical engineers collaborate. These virtual tools can help project teams make decisions more quickly, reduce costs, and increase productivity.

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.

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.

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.

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.

Understanding Sealing Solutions

July
2009
Back To Basics
Jim Drago, Matt Tones
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.

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.

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