[Gasification] coal gasification, where did the hydrogen come from?

[Thomas Reed]

Dear Tasliman and all

You left out 

CO + H2O ==> CO2 + H2.      

Which is the "Watergas Shift" reaction.

The energy (enthalpy) change is very close to zero.  It is favored for entropy reasons below about 700C over an iron or cobalt catalyst.  It is a very important reaction, see Wikipedia .

Tom Reed



Dr Thomas B Reed 
The Biomass Energy Foundation
www.Woodgas.com

On Feb 10, 2012, at 12:52 AM, Tasliman <emtaz2010 at gmail.com> wrote:

> Dear list
> I must write a brief explanation about biomass and coal gasification. I am confused when I must explain hydrogen production from gasification. I can understand quite well about biomass gasification, because biomass contains H in their chains. But I still have no idea when many authors wrote about producing Hydrogen from coal.
> 
> AFAIK coal is mainly carbon, but many wrote this reaction, concerning oxygen gasification
> 
> C + O2 --> CO2
> C + 1/2 O2 --> CO
> H + 1/2 O2 --> H2O
> 
> my question is where does the hydrogen in that reaction come from if it is not a steam gasification?
> Or it should be a steam gasification ?
> 
> Thank you,
> Tasliman
> 
> 
> 
> 
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