This work aims to demonstrate the use of Excel spreadsheets for solving L-L extraction problems. The key to solving the problems successfully is to be able to determine a tie line on the ternary diagram where the calculation must be carried out. This enables the reader to analyze the extraction process starting with a simple operation, the…

Novel analytical solutions based on the Lambert W function for two problems in ultrafiltration and diafiltration are described. Example problems, suitable for incorporation into an introductory module in unit operations, membrane processing, or numerical methods are provided in each case.

The rising need for engineers has led to increased interest in community outreach in engineering departments nationwide. We present a sustainable outreach model involving trained undergraduate mentors to build ties with K-12 teachers and students. An associated online module database of chemical engineering demonstrations, available to educators…

Pre-recorded video demonstrations of laboratory experiments are used to introduce students to various experiments in a lab course instead of an in-class tutorial. In addition to saving time for both the students and the instructor, this allows students to watch the videos in an "on-demand" setting at their convenience, which is helpful…

Fluency with poroelastic theory is prerequisite to advanced study of material and mass transport properties in a wide range of contexts. Often the greatest challenge in introducing students to the subject is to help them visualize the fluid flows and deformations that accompany phenomena such as creep and stress relaxation. We have developed a…

A demonstration experiment is described that employs the ozone decomposition reaction at ambient conditions on Fe2O3 impregnated Fluidized Catalytic Cracking (FCC) catalyst. Using a two-dimensional see-through column the importance of interphase mass transfer is clearly illustrated by the significant difference in ozone conversion between the…

We present a simple, effective, and inexpensive spectrophotometer design that may be used in a stand-alone teaching module, and to enhance various unit operations experiments. The spectrophotometers described performed as well as a commercial option at estimating cell concentration in a bioreactor and tracking a first-order reaction. Such devices…

This article describes a hands-on activity and demonstration developed at the University of Washington and further reined at the University of New Mexico. In this activity, the authors present a real-world problem to the student: Someone has an injured finger joint, and the students in the class need to design an implant to replace it. After…

Describes a demonstration apparatus used to study the explosive limits of a typical hydrocarbon. (MLH)

The demonstration of a simple viscosity experiment for high school classes was conducted and assessed. The purpose of the demonstration was to elicit the interest of high school juniors and seniors in the field of chemical engineering. The demonstration consisted of a discussion on both engineering and the concept of viscosity as well as a…

This article explains a simple way to demonstrate natural convection, such as from a lit candle, in the classroom using an overhead projector. The demonstration is based on the principle of schlieren imaging, commonly used to visualize variations in density for gas flows.

This simple example demonstrates the physical significance of similarity solutions and the utility of dimensional and asymptotic analysis of partial differential equations. A procedure to determine the existence of similarity solutions is proposed and subsequently applied to transient constant-flux heat transfer. Short-time expressions follow from…

Eleven videotaped kinetics and catalysis demonstrations are described. Demonstrations include the clock reaction, oscillating reaction, hydrogen oxidation in air, hydrogen-oxygen explosion, acid-base properties of solids, high- and low-temperature zeolite reactivity, copper catalysis of ammonia oxidation and sodium peroxide decomposition, ammonia…

A demonstration used in a heat and material balances class that explains how a reusable heat pack works is described. An initial homework problem or exam question is provided with its solution. A discussion of the solution is included. (KR)

Outlines a multidisciplinary course which comprises fundamental, practical, and experimental aspects of heterogeneous catalysis. The course structure is a combination of lectures and demonstrations dealing with the use of spectroscopic techniques for surface analysis. (SK)