Hybrid Car – More Fun with Less Gas

MIT primed to unleash solar revolution - Page 2

register ::  Login Password  :: Lost Password?
Posted by Solar Flare on August 2, 2008, 6:22 pm
 
I read the article, breifly, also and it looked to me like they are claiming
the invention of the wheel ...again. There were no tech details, in the
article I read, and the process was the same old splitting water into two
gases as people have done for decades at big losses.


wrote:

No, it wasn't.  Your opinion apparently precluded your reading
comprehension.


Would you like your perfect solution wrapped up with a bow and
installed free of charge?  Sheesh.


Uh huh.

R



Posted by J. Clarke on August 2, 2008, 11:37 pm
 
Solar Flare wrote:

I'd agree that it's badly written.  I can't imagine a professor at MIT
calling a press conference over the discovery of electrolysis.  I
suspect that he was really announcing something else that the reporter
missed.

Kind of reminds me of a story a while back (but in this century)
reporting a radical breakthrough, a ship that could cross the Atlantic
on a single tank of fuel.

The press these days isn't any more reliable than the blogosphere, and
then they wonder why subscriptions are tanking.


Well, if it's supposed to be a radical breakthrough involving
electrolysis, yes.


to email, dial "usenet" and validate
(was jclarke at eye bee em dot net)



Posted by Duane C. Johnson on August 3, 2008, 12:38 am
 J. Clarke wrote:

The artical:
http://web.mit.edu/newsoffice/2008/oxygen-0731.html

 > I'd agree that it's badly written. I can't imagine a
 > professor at MIT calling a press conference over the
 > discovery of electrolysis. I suspect that he was really
 > announcing something else that the reporter missed.

Well, he didn't say he invented electrolyses.

However he did say this:

"The key component in Nocera and Kanan's new process is
  a new catalyst that produces oxygen gas from water;
  another catalyst produces valuable hydrogen gas. The
  new catalyst consists of cobalt metal, phosphate and
  an electrode, placed in water. When electricity --
  whether from a photovoltaic cell, a wind turbine or
  any other source -- runs through the electrode, the
  cobalt and phosphate form a thin film on the electrode,
  and oxygen gas is produced."

"Combined with another catalyst, such as platinum, that
  can produce hydrogen gas from water, the system can
  duplicate the water splitting reaction that occurs
  during photosynthesis."

"The new catalyst works at room temperature, in neutral
  pH water, and it's easy to set up, Nocera said. 'That's
  why I know this is going to work. It's so easy to
  implement,' he said."

What he did, so he says, is to make an improvement and
cost reduction in the structure of one of the electrodes.
The one that liberates the oxygen. He did nothing to the
hydrogen liberating electrode.

Advancements often come in little steps.

Duane

--
     Home of the $5 Solar Tracker      Receiver
    http://www.redrok.com/led3xassm.htm       [*]
   Powered by             \  \     \        //|
  Thermonuclear   Solar Energy from the Sun / |
Energy (the SUN)           \  \     \  /  /  |
Red Rock Energy             \  \     /   /   |
Duane C. Johnson   Designer  \  \  /  \ /    |
1825 Florence St  Heliostat,Control,& Mounts |
White Bear Lake, Minnesota    === \   / \    |
USA      55110-3364                ===   \   |
(651)426-4766        use Courier New Font \  |
redrok@redrok.com     (my email: address)  \ |
http://www.redrok.com   (Web site)          ===

Posted by J. Clarke on August 3, 2008, 1:30 am
 Duane C. Johnson wrote:

The process that you have just described is called "electrolysis".
There is nothing new about it.

--
--
--John
to email, dial "usenet" and validate
(was jclarke at eye bee em dot net)



Posted by Mauried on August 3, 2008, 2:44 am
 On Sat, 2 Aug 2008 21:30:23 -0400, "J. Clarke"


Even if the process is 100% efficient,what happens next.
You can store the H2 either as liquid or compressed gas, but when you
convert the H2 back to electrtcity in a fuel cell, that process is at
best only 50% efficient.
A Hydrogen fuel cell producesa lot of heat in the process of making
electricity.
You can see this is the steam that comes out of them as water vapour.

No large scale energy storage system can afford to lose 50% of the
stored energy.
Even pumped hydro is better than 50%.


This Thread
Bookmark this thread:
 
 
 
 
 
 
  •  
  • Subject
  • Author
  • Date
please rate this thread