[Stoves] Gas heater without flames comment

[Michael N Trevor]

This might have applicability along the line some where

New Chemical Process Could Make Ammonia a Practical Car Fuel

A phys.org article says UK researchers have made a breakthrough that could 
make ammonia a practical source of hydrogen for fueling cars. From the 
article: "Many catalysts can effectively crack ammonia to release the 
hydrogen, but the best ones are very expensive precious metals. This new 
method is different and involves two simultaneous chemical processes rather 
than using a catalyst, and can achieve the same result at a fraction of the 
cost. ... Professor Bill David, who led the STFC research team at the ISIS 
Neutron Source, said 'Our approach is as effective as the best current 
catalysts but the active material, sodium amide, costs pennies to produce. 
We can produce hydrogen from ammonia "on demand" effectively and 
affordably.'" The full paper. The researchers claim that a two-liter 
reaction chamber could produce enough hydrogen to power a typical sedan.




-----Original Message----- 
From: David Young
Sent: Sunday, June 29, 2014 11:43 AM
To: Discussion of biomass cooking stoves
Subject: Re: [Stoves] Gas heater without flames

On Tue, Jun 17, 2014 at 05:33:09PM -0400, Crispin Pemberton-Pigott wrote:
> Keeping an eye on trends:
>
> http://www.youtube.com/watch?v=yvqEFPPLh7Q
> <http://www.youtube.com/watch?v=yvqEFPPLh7Q&list=PL6ABEE1873667B871>
> &list=PL6ABEE1873667B871

Neat device.  I take it that one advantage to using a catalyst instead
of flame combustion is that you can use lower temperatures, and at
lower temperatures, there are fewer reactions of atmospheric N2 and O2
producing NOx?

The device seems to use a precious metal, platinum, for a catalyst.
Perhaps suppose it is a greater problem that the metal is hard to come
by than expensive, if the amounts are very small.  Is it possible to use
less expensive catalysts to bring the cost down?  For example, it's my
understanding that mild steel catalyzes CO combustion.

Dave

-- 
David Young
dyoung at pobox.com    Urbana, IL    (217) 721-9981

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