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June 2008, Vol. 104, No. 6
In This Issue
COVER STORY: DISTILLATION
Effects of Design on Tray Efficiency in Commercial Towers
When designing a new distillation column or revamping an existing one, it is important to understand the factors that affect overall tray efficiency.
Henry Z. Kister
NEWS
Nanosensors: Evolution, Not Revolution...Yet
Promising nanotechnology-enabled sensors, monitoring devices and analytical instruments continue to advance toward commercialization for diverse industrial, environmental, medical and military applications — but hurdles remain.
Suzanne A. Shelley
MATERIALS OF CONSTRUCTION
Choose the Right Elastomer
Match a material's performance to process conditions to reduce leaks, improve safety and extend the mean time between failures (MTBF).
William M. Stahl
INSTRUMENTATION AND CONTROL
Improve Control of Liquid Level Loops
Use this tuning recipe for the classic integrating process control challenge.
Robert Rice and Douglas J. Cooper
BIOCHEMICAL ENGINEERING
Understand Discrete Nanoscale Transport
Unlike mass, energy and momentum transfer, which are described by continuum equations, the movements and interactions of the nanoscale entitites within a cell constitute the transport phenomenon known as discrete nanoscale transport (DNT).
Anh-Tuan Dinh, Chinmay Pangarkar and Samir Mitragotri