2008

Nanomaterials: What are the Environmental and Health Impacts?

December
2008
Critical Issues
Nastassja Lewinski
As with previous emerging technologies, there have been uncertainties and concerns about the environmental and health risks associated with nanotechnology. This article reviews some of the ongoing efforts to better understand and characterize...

Conference Explores Developing Bioeconomy

March
2008
Special Section
Brad Buecker
Infrastructure, biomass conversion, sources of biomass, and environmental and other impacts are some of the challenges facing the commercialization of biofuels.

Dealing with Climate Change at the Local Level

February
2008
Opinion
Paul A. Jennings
Whatever problems may be caused by climate change, engineers will be expected to solve them.Now is the time to begin addressing the issues at the local and regional scale.

Use Model-Predictive Control to Improve Distillation Operations

January
2008
Instrumentation
Robert J. Conroy, Daniel R. Webb, Robert D. Rounding, Umesh Mathur
This methodology, based on steady-state and dynamic simulation, can be used to develop the necessary models— and avoid disruptive and costly step testing to the extent feasible.

Use Spreadsheets to Estimate Modeling Parameters

February
2008
Computational Methods
Tomas B. Co
Dynamic process modeling based on non-uniformly sampled data and multiple sampling runs, even for nonlinear systems, can be performed using spreadsheet implementations of the weighted-least-squares (WLSQ) and Runge-Kutta WLSQ methods.

Harnessing Natural Energy

March
2008
Special Section
Travis W. Walker
Before solar and wind energy can be widely exploited, a method for storing the energy provided by these intermittent sources and releasing it as demand arises must be developed.

Selecting Agitator Seals for Bioprocessing Applications

January
2008
Fluids and Solids Handling
William Ho Liam Teng, Gregory T. Benz
Issues such as sterility, isolation and contamination must be considered when choosing seals for use in biotech and pharmaceutical processes. This overview describes common types of seals and offers guidance on selecting the appropriate seal for...

How Will You Manage?

July
2008
Career Catalyst
Glen Rosentrater
Engineers typically don’t learn the “soft skills” of team and project management in school. Here is a game plan to help you supplement your technical expertise with effective leadership.

Find Mixing Success Through Failures - Part 2

December
2008
Fluids and Solids Handling
Gary K. Patterson, David S. Dickey
Understanding when and why mixing fails in the laboratory is often the only way of avoiding a similar failure in a production-scale reactor. Here we examine mixing in stirred-tank reactors and provide guidance on scale-up.

How Might Biofuels Impact the Chemical Industry?

March
2008
Special Section
Mark E. Jones, Keith J. Watson, William F. Banholzer
Considering the range of possibilities and constraints, a major transformation of the chemical industry's current capital structure is unlikely for at least a few decades.

Eliminate Iteration from Flow Problems

March
2008
Fluids and Solids Handling
John D. Barry
This article introduces a novel approach to solving flow and pipe-sizing problems based on two new dimensionless quantities that are independent of line size and flow.

Form Nanoparticles via Controlled Crystallization

October
2008
Reactions and Separations
Robert J. Fisher, Thomai Panagiotou
This continuous bottom-up approach allows precise control of the crystallization process to achieve size, distribution and quality goals, as well as realize the benefits of process intensification.

Choose the Right Elastomer

June
2008
Materials
William M. Stahl
Match a material's performance to process conditions to reduce leaks, improve safety and extend the mean time between failures (MTBF).

Biobutanol – A Replacement for Bioethanol?

August
2008
SBE Special Section
Ron Cascone
Ethanol, the leading incumbant biofuel, has several limitations.Butanol overcomes many of these, and holds promise as the next important transportation biofuel.
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