Re: Water as a byproduct of gasification

[AJH <andrew.heggie@dtn.ntl.com>]

On Sun, 14 Apr 2002 11:14:47 EDT, CAVM@aol.com wrote:

>
>If water vapor comes off of the combustion of propane and natural gas, I 
>reasoned that it would like wise be a byproduct of the combustion of gas from 
>a gasifier.

Reasonable assumption for a gasifier working on woody biomass.
>
>If I had an unlimited inexpensive fuel, a gasifier and a use for the heat 
>produced by the combustion of the gas, water could be a cheap byproduct of 
>the process.  Let's say that I had a large coal mine in an arid area.  I want 
>to gasify the coal, burn the gas and collect the water byproduct.  Of course, 
>the burning of the gas would be in a value added process, not wasted.

Trouble is that coal is basically carbon with a few hydrocarbons
associated with it i.e. very little hydrogen in the fuel, water is
only formed by the oxidation of this hydrogen. You can make hydrogen
during gasification of coal but only by adding water (which you don't
have available in this instance.
>
>If this is correct, even to a small degree, couldn't a gasifier stove in an 
>arid part of Africa, Afghanistan or anywhere, produce a small amount of 
>collectable water as it did its work?

Only if run on biomass and then only at vastly increased capital cost.

AJH


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