January 2020 | AIChE

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January 2020

Is Pressure Drop Really Quadratic?

Simulators and spreadsheets are the mainstay of pressure drop calculations in the modern world.  However, to avoid excessive reliance on these tools, the engineer requires conceptual understanding of the phenomena and associated correlations.  This assists with reasonableness checking...

Energy Use in Cryogenic Air Separation Units

Cryogenic Air Separation Units (ASUs) use some of the largest compressors ever built. Power consumption in large ASUs use almost the entire capacity of a power plant. A modern large ASU might consume up to 100 MW electricity. Thus it is important to understand how much power your ASU might...

Trends: Polymers and Textiles

This column will cover manufacturing and innovations, advancements in materials and fibers, workforce development, advanced textiles applications, business developments for advanced materials and products and aspects of sustainability. ...

Reduce Loss of Containment

You don’t need to be working directly in process safety to be aware of, and perhaps even worry about, possible releases of hazardous chemicals. If you work at a facility – plant, pilot plant, or laboratory – with hazardous chemicals you should know: (1) loss of containment (LOC) of the wrong...

Nitrogen Polluted Water

Effluent streams of domestic origin contain nitrogen (N) and phosphorus (P) that are essential nutrients for the growth and metabolism of microbial population in biological wastewater treatment process. Uncontrolled discharge of nutrients to a confined body of water fosters aquatic growth of...

Hurricane Response and Loss of Containment

Natural disasters present chemical plants with unique challenges. Here is how to reduce environmental harm and avoid regulatory penalties.

To reduce the risks of injury, environmental harm or regulatory penalties, a successful disaster response requires extensive expertise and knowledge...

Pressure Relief Valve Sizing

While working on a project for a tolling manufacturer that uses a single piece of process equipment for numerous chemicals, we realized the need to determine the worst-case chemical for each relief scenario. Since each relief device can see dozens of chemicals, we needed a method to...

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