[Gasification] Blue Water Gas

[Jonathan F. Pratt]

Jeff,

Seems like it is logical to utilize an ICE engine for a "blue water gas" 
like process.  But the engine exhaust isn't hot enough in itself for a 
straight reaction, not only are high temps required but continuous input of 
heat is required to maintain the highly endothermic reaction.

My understanding is that roughly half the waste heat of of ICE's come out of 
the coolant and the other half roughly the exhaust.  To utilize as much of 
the "waste" heat as possibly it would work best to get your water directly 
from the coolant line, maybe run that at a little over boiling temps so 
essentially you use the coolant line as a boiler to make the steam but 
maintain the coolant as liquid water under pressure.  This system would 
require water injection under pressure to maintain equilibrium.  Have a 
pressure release valve of course for safety if water pressures get too high. 
So there you have your steam source.

Out the exhaust you get your exhaust heat.  You can think of a couple ways 
to extract that heat.  Maybe directly though some kind of  "heat" cycle to 
heat the charcoal, maybe injecting a mix of air+exhaust into the charcoal 
bed?  You could definately use a heat exhanger but I think you would need an 
additional heat input for the reaction to be continuous, the fuel for that 
burner could come right from the gas output.

Maybe the "optimum" here is to use a fluidizing bed reactor using sand as 
the heat transfer medium.  The sand circulates along with charcoal particles 
no bigger than a few MM.  The sand is heated on one side by the exhaust + 
burner heat, inside the reactor charcoal is injected along with steam, the 
process and the gas produced keeps the sand "fluidized" in a clockwise 
fashion in and out of the reactor through the heater section.

Jonathan

>
> Message: 2
> Date: Sun, 19 Nov 2006 01:09:54 -0500
> From: Jeff Davis <jeff0124 at velocity.net>
> Subject: Re: [Gasification] Blue Water gas - Back to the future?
> To: gasification at listserv.repp.org
> Message-ID: <200611190109.54688.jeff0124 at velocity.net>
> Content-Type: text/plain;  charset="iso-8859-1"
>
> On Saturday 18 November 2006 09:45 am, Thomas Reed wrote:
>> ------------------------------------------------------------------------
>> Is it possible that we could make even better synthesis gas (water gas)
>> using the blue water gas process and densified biomass?
>>
>> Comments?
>>
>> TOM REED            BEF
>
>
> Well, this is a crazy idea that I think about from time to time:
>
> Components: engine, charcoal, steam
>
> - Special exhaust manifold that would be the reactor (heat charcoal)
>
> - More exhaust heat to make steam.
>
> - Inject the steam into the red hot charcoal (will the exhaust temp. be 
> high
> enough??)
>
> This way we use the engine exhaust heat to reform our fuel and could skip 
> the
> air blown process (that's if the exhaust heat is high enough).
>
>
>
> Just one more crazy idea......
>
>
>
> Jeff
>
>
>
>
>
>
> -- 
> Jeff Davis
> Somewhere 20 miles south of Lake Erie, USA
> http://www.velocity.net/~jeff0124
>