Chemicals & Materials

Predictive Modeling in Catalysis - From Dream to Reality

On The Horizon
Ana G. Maldonado
In silicocatalyst optimization is the ultimate application of computers in catalysis. This article provides an overview of the basic concepts of predictive modeling and describes how this technique can be used in catalyst and reaction design.

Producing Nitrogen via Pressure Swing Adsorption

Reactions and Separations
Svetlana Ivanova, Robert Lewis
Pressure swing adsorption (PSA) can be a cost-effective method of onsite nitrogen generation for a wide range of purity and flow requirements.

CEP: Chem Economics - Plastic Additives are Poised for Growth

Chem Economics
T. Kevin Swift
Not all polymers are useful and/or processable in their natural form. Thus, functional chemicals are added to polymer resins to facilitate processing and to enhance, extend, or otherwise modify the properties of the plastic products manufactured from polymer resins. Such plastic additives represent a $4.6-billion business in the U.S.

Making Plastics: From Monomer to Polymer

Back To Basics
Pete Sharpe
Versatility, ease of manufacture, and relatively low cost make plastics some of the most useful materials for a wide range of applications. This article explains the chemistry and production processes behind two of the most popular plastics — polyethylene and polypropylene.

Piloting Bioreactors for Agitation Scale-Up

Reactions and Separations
Gregory T. Benz
This article offers guidance on how to design appropriate experiments to measure scalable data for agitation in both aerobic and anaerobic bioreactors.

Nanotechnology: A Guide to Nano-Objects

On The Horizon
Sravani Gullapalli, Michael Wong
Rapid change in the field of nanotechnology can make it hard to keep track of the latest nanomaterial developments. Here's a primer on the most common shapes, sizes, and compositions of nano-objects.

Accurately Predict the VLE of Thiol-Hydrocarbon Mixtures

Reactions and Separations
Wayne Sim, Vince Tassone, Chorng H. Twu
This methodology can be used to calculate vapor-liquid equilibria (VLE) between thiols and hydrocarbons at any composition, temperature or pressure to improve gasoline fractionation processes.

A Renewable Route to Propylene Glycol

News Feature
Suzanne Shelley
Rapid expansion in biodiesel production has spurred a bumper crop of competing processes to turn byproduct glycerin into propylene glycol.

Nanosensors: Evolution, Not Revolution...Yet

News Feature
Suzanne A. Shelley
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.

Understand Flow Patterns in Glass-Lined Reactors

Reactions and Separations
Kevin J. Bittorf, David S. Dickey, Keith E. Johnson , Christopher J. Ramsey
Physical modeling and computer simulation provide insights into the performance of a glass-lined reactor.

CEP: Catalyzing Commercialization - Turning a Problem into a Cure for Increased Ethanol Yield

Catalyzing Commercialization
The beneficial microbes that convert milk into yogurt and act in our guts to promote digestive health cause big problems in ethanol fermentation tanks. These lactic acid bacteria (LAB) proliferate in ethanol feedstock and inhibit growth of ethanol-producing yeast — which slows down fermentation, reduces biofuel yield by as much as 20% per pound of input material, and results in production shutdowns due to contamination. The most common control measures, chemical antimicrobials such as antibiotics, do not eliminate LAB. Additionally, the potential for antibiotic residue limits the marketability of dried distillers grains, a byproduct of the fermentation process used as animal feed. Ecolyse Inc., based in College Station, TX, is working to address this issue by developing products to treat bacterial contamination.

Material Matters: Disappearing Materials in Aging Plants

Material Matters
Kirk Richardson
Replacing materials and equipment as they corrode or reach the end of their service life is one of the challenges of managing an aging plant. When a material or part is no longer available because the supplier discontinued the product line, was acquired by another company, or went out of business, it can be difficult to find another source or suitable replacement.

2019 AIChE Annual Meeting

November 10-15, 2019
The AIChE Annual Meeting is the premier educational forum for chemical engineers interested in innovation and professional growth. Academic and industry experts will cover wide range of topics relevant to cutting-edge research, new technologies, and emerging growth areas in chemical engineering.

A Novel TPOX-Based "Swiss-Roll" Fuel Reformer

Conference Presentation
AIChE Annual Meeting
November 19, 2014
A compact, non-catalytic, thermal partial oxidation (TPOX) based reformer has been developed to provide hydrogen-rich syngas to solid oxide fuel...

Alternate Fuel Synthesis in Supercritical Solvents

Conference Presentation
AIChE Annual Meeting
November 19, 2014
Anant Sarve , Mahesh N. Varma*, Shreeram S. Sonawane. Department of Chemical Engineering, Visvesvaraya National Institute of Technology, Nagpur,...
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