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<DIV>It would be nice if we could make the undermentioned research an efficient
method of producing fuel.</DIV>
<DIV>Craig A. Grimes, professor of electrical engineering and his team used
titanium dioxide nanotubes doped with nitrogen and coated with a thin layer of
both copper and platinum to convert a mixture of carbon dioxide and water vapor
to methane. Using outdoor, visible light, they reported a 20-times higher yield
of methane than previously published attempts conducted in laboratory conditions
using intense ultraviolet exposures.<BR>The chemical conversion of water and
carbon dioxide to methane is simple on paper -- one carbon dioxide molecule and
two water molecules become one methane molecule and two oxygen molecules.
However, for the reaction to occur, at least eight photons are required for each
molecule.<BR>"Converting carbon dioxide and water to methane using
photocatalysis is an appealing idea, but historically, attempts have had very
low conversion rates," said Grimes who is also a member of Penn State's
Materials Research Institute. "To get significant hydrocarbon reaction yields
requires an efficient photocatalyst that uses the maximum energy available in
sunlight."<BR>The team, which also included Oomman K. Varghese and Maggie
Paulose, Materials Research Institute research scientists and Thomas J. LaTempa,
graduate student in electrical engineering, used natural sunlight to test their
nanotubes in a chamber containing a mix of water vapor and carbon dioxide. They
exposed the co-catalyst sensitized nanotubes to sunlight for 2.5 to 3.5 hours
when the sun produced between 102 and 75 milliwatts for each square centimeter
exposed.</DIV>
<DIV> </DIV>
<DIV>GFWHELL</DIV>
<DIV> </DIV>
<DIV><BR>Read more at: <A
href="http://phys.org/news155471367.html#jCp">http://phys.org/news155471367.html#jCp</A><BR></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>
<DIV>In a message dated 4/16/2015 3:43:24 A.M. Eastern Daylight Time,
adkarve@gmail.com writes:</DIV>
<BLOCKQUOTE
style="BORDER-LEFT: blue 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><FONT
style="BACKGROUND-COLOR: transparent" color=#000000 size=2 face=Arial>A note
explaining the background of my query:<BR>Hydrogen represents a clean fuel. I
am a biologist and I came across a<BR>lot of very fancy microbial procedures
for obtaining hydrogen. One<BR>needs specific microbes for this purpose and
keeping the microbial<BR>culture pure is a big hassle in most large scale
microbiological<BR>reactions. Some very simple physico-chemical methods are
available for<BR>obtaining hydrogen. I got interested in the one using
charcoal,<BR>because it is based on a renewable resource. This is the
explanation<BR>why I wanted to remove CO from coal gas. I thank the list
members for<BR>the overwhelming response.<BR>Yours<BR>A.D.Karve<BR>***<BR>Dr.
A.D. Karve<BR><BR>Chairman, Samuchit Enviro Tech Pvt Ltd
(www.samuchit.com)<BR><BR>Trustee & Founder President, Appropriate Rural
Technology Institute (ARTI)<BR><BR><BR>On Tue, Apr 14, 2015 at 8:43 AM, Anand
Karve <adkarve@gmail.com> wrote:<BR>> Dear Mark,<BR>> thanks for
the tip.<BR>> Yours<BR>> A.D.Karve<BR>> ***<BR>> Dr. A.D.
Karve<BR>><BR>> Chairman, Samuchit Enviro Tech Pvt Ltd
(www.samuchit.com)<BR>><BR>> Trustee & Founder President,
Appropriate Rural Technology Institute (ARTI)<BR>><BR>><BR>> On Sun,
Apr 12, 2015 at 9:25 AM, Mark Elliott Ludlow <mark@ludlow.com>
wrote:<BR>>> Dear Dr. Karve,<BR>>> Bubble the gas through ammonium
hydroxide solution.<BR>>> Mark<BR>>><BR>>> -----Original
Message-----<BR>>> From: Gasification
[mailto:gasification-bounces@lists.bioenergylists.org] On<BR>>> Behalf
Of Anand Karve<BR>>> Sent: Saturday, April 11, 2015 8:15 PM<BR>>>
To: Discussion of biomass pyrolysis and gasification<BR>>> Cc: Manohar
Badiger<BR>>> Subject: [Gasification] eliminating carbon monoxide from
coal gas<BR>>><BR>>> Coal gas as automotive fuel<BR>>>
Agriculture, forests and urban centres in India produce annually about
1000<BR>>> million tons of combustible waste biomass. Its energy content
is almost 3<BR>>> times as much as the petroleum that we currently use
in our country.<BR>>> Samuchit Enviro Tech developed a simple and
nonpolluting technology for<BR>>> converting combustible biomass into
charcoal. When hot charcoal is treated<BR>>> with steam, it produces
coal gas, consisting of a mixture of carbon monoxide<BR>>> and hydrogen.
We have used this reaction in an experimental stove, in which<BR>>> the
coal gas is<BR>>> used as fuel. Can anybody suggest a simple
method of removing carbon<BR>>> monoxide from coal gas?<BR>>>
Yours<BR>>> A.D.Karve<BR>>><BR>>> ***<BR>>> Dr. A.D.
Karve<BR>>><BR>>> Chairman, Samuchit Enviro Tech Pvt Ltd
(www.samuchit.com)<BR>>><BR>>> Trustee & Founder President,
Appropriate Rural Technology Institute (ARTI)<BR>>><BR>>>
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