Chemical Engineering May 2012 - 17

CHEMENTATOR
(Continued from p. 14)
Making structured carbon fibers from polyethylene
R
esearches at the U.S. Dept. of Energy's
Oak Ridge National Laboratory
(ORNL; Oak Ridge, Tenn.;
www.ornl.gov) are developing a
process that makes carbon fibers
with customized surface contours
from polyethylene-based fibers.
The patent-pending technique
uses a combination of fiber-spinning
and a sulfonation technique
developed at ORNL. By controlling
the process conditions, the scientists
are able to tune the porosity
of the fibers, making the material
potentially useful for filtration, catalysis
and electrochemical energy
harvesting, says ORNL. Carbon fibers with
unique cross-sectional geometry, from hollow
circular to gear shaped (photo), have
been produced.
Fiber bundles are first made by a multicomponent
melt extrusion-based fiberspinning
method. The fiber bundle is then
sulfonated in an acid bath, which converts
the plastic fiber into an infusable form - a
and the catalysts demonstrated
high-performance for more
than 11,000 h of demonstration
operations, and achieved
continuous operation for more
than 3,000 h. at the same time,
liquid products from the JapangTl
process were also tested.
For example, 100% Japan-gTl
Diesel was used for around
three months by city buses.
Flame retardants
last month, albemarle Corp.
Oak Ridge National Laboratory
black fiber that no longer melts. Heating to
very high temperatures volatizes all other
elements except carbon.
The process may also be an economical
route to making lightweight materials,
since the raw materials can be waste plastic
bags, carpet backing scraps and salvage,
which is inexpensive and abundant, according
to ORNL.
■
(Baton rouge, la.; www.albe
marle.com) expanded its earthwise
platform of sustainable
products by introducing a new
polymeric lame retardant for use
in extruded (XPS) and expanded
(ePS) polystyrene applications.
This new technology, licensed
from Dow global Technologies
llC, a subsidiary of The Dow
Chemical Co. (midland, mich.;
www.dow.com) will be commercialized
under albemarle's
earthwise brand, and will provide
a stable, high molecular weight,
non-PBT (persistent, bioaccumulative,
toxic) product. ❏
Circle XX on p. XX or go to adlinks.che.com/230XX-XX
Circle 4 on p. 61 or go to adlinks.che.com/40267-04
ChemiCal engineering www.Che.Com may 2012 17

http://www.ornl.gov http://www.albe http://www.marle.com http://www.dow.com http://adlinks.che.com/40267-04 http://adlinks.che.com/230XX-XX http://www.Che.Com

Chemical Engineering May 2012

Table of Contents for the Digital Edition of Chemical Engineering May 2012

Contents
Chemical Engineering May 2012 - Cover1
Chemical Engineering May 2012 - Cover2
Chemical Engineering May 2012 - Contents
Chemical Engineering May 2012 - 2
Chemical Engineering May 2012 - 3
Chemical Engineering May 2012 - 4
Chemical Engineering May 2012 - 5
Chemical Engineering May 2012 - 6
Chemical Engineering May 2012 - 7
Chemical Engineering May 2012 - 8
Chemical Engineering May 2012 - 9
Chemical Engineering May 2012 - 10
Chemical Engineering May 2012 - 11
Chemical Engineering May 2012 - 12
Chemical Engineering May 2012 - 13
Chemical Engineering May 2012 - 14
Chemical Engineering May 2012 - 15
Chemical Engineering May 2012 - 16
Chemical Engineering May 2012 - 17
Chemical Engineering May 2012 - 18
Chemical Engineering May 2012 - 19
Chemical Engineering May 2012 - 20
Chemical Engineering May 2012 - 21
Chemical Engineering May 2012 - 22
Chemical Engineering May 2012 - 23
Chemical Engineering May 2012 - 24
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Chemical Engineering May 2012 - 26
Chemical Engineering May 2012 - 27
Chemical Engineering May 2012 - 28
Chemical Engineering May 2012 - 29
Chemical Engineering May 2012 - 30
Chemical Engineering May 2012 - 31
Chemical Engineering May 2012 - 32
Chemical Engineering May 2012 - 33
Chemical Engineering May 2012 - 34
Chemical Engineering May 2012 - 35
Chemical Engineering May 2012 - 36
Chemical Engineering May 2012 - 37
Chemical Engineering May 2012 - 38
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Chemical Engineering May 2012 - 40
Chemical Engineering May 2012 - 41
Chemical Engineering May 2012 - 42
Chemical Engineering May 2012 - 43
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Chemical Engineering May 2012 - Cover3
Chemical Engineering May 2012 - Cover4
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