my.chemeurope.com
With an accout for my.chemeurope.com you can always see everything at a glance – and you can configure your own website and individual newsletter.
Abstract
The kinetics of ammonia absorption into magnesium chloride is measured as ammonia pressure change in the temperature range 170‐430°C. The actual pressure minus that at equilibrium drops quickly, with a half life of less than a minute. It varies with the square‐root of time, suggesting diffusion limited absorption. The diffusion coefficient of ammonia in solid magnesium chloride inferred from these data is on the order 10−11‐10−13 cm2/s, considerably faster than many solid‐phase diffusivities. While optical microscopy and BET surface area experiments indicate recrystallization and agglomeration of the absorbent at ammonia synthesis temperatures, the absorption rate remains high. The dependence of absorption rate on temperature, particle size and the presence of a silica support is also investigated. The results suggest both improved ammonia separation and ways to develop high‐conversion, small‐scale, multifunctional ammonia synthesis reactors. © 2012 American Institute of Chemical Engineers AIChE J, 2012
| Authors: | Mark S. Huberty, Andrew L. Wagner, Alon McCormick, Edward Cussler | |
| Journal: | AIChE Journal | |
| Year: | 2012 | |
| Pages: | n/a | |
| DOI: | 10.1002/aic.13744 | |
| Publication date: | 12-03-2012 |
Watchlist
This is where you can add this publication to your personal favourites.
Additional Information
Vesicle‐Mediated Growth of Tubular Branches and Centimeter‐Long Microtubes from a Single Molecule
Abstract The mechanism by which small molecules assemble into microscale tubular structures in aqueous solution remains poorly understood, particularly when the initial building blocks are non‐amphiphilic molecules and no surfactant is used. It is here shown how a subnanometric molecule ... more
The image illustrates a natural phenomenon of droplet formation caused by the condensation of vapor on a nonwettable surface at temperature below the dew point. Real‐time observing the light scattered from the droplets may lead to a new mechanism for vapor sensing. However, the dew point ... more
NO is a key vasodilator in mammalian cardiovascular systems and has been shown to sensitize tissue to γ‐radiation. However, photochemical NO precursors that can be activated by these NIR wavelengths are extremely limited. G. D. Stucky, D. Zhao, P. C. Ford, F. Zhang and co‐workers have ad ... more
Bioengineers Succeed in Producing Plastic Without the use of Fossil Fuels
A team of pioneering South Korean scientists have succeeded in producing the polymers used for everyday plastics through bioengineering, rather than through the use of fossil fuel based chemicals. This groundbreaking research, which may now allow for the production of environmentally consci ... more
In the past, restoration of paintings and other old artwork often involved application of acrylic resins to consolidate and protect them. One of the most important tasks for modern restorers is thus to remove these layers, because it turns out that acrylic resins not only drastically change ... more
Is trash the solution to tackling climate change?
Converting the trash that fills the world's landfills into biofuel may be the answer to both the growing energy crisis and to tackling carbon emissions, claim scientists in Singapore and Switzerland. New research published in Global Change Biology: Bioenergy, reveals how replacing gasoline ... more
Über CHEMIE.DE
CHEMIE.DE Information Service GmbH runs specialist scientific internet portals. The secret to our success? We are familiar with what we publish.
Advertising at CHEMIE.DE
Our advertising formats support you in getting your message across to a clearly defined target audience.
© 1997-2013 CHEMIE.DE Information Service GmbH, All rights reserved
Netmeeting
