Re: GAS-L: maximum pressure

["Rufaro Kaitano" <CHIRK@puknet.puk.ac.za>]

Motie,
Sorry for the hick-up, I am starting with high -ash, coal-char and then gasify separately in three different ways,  (1) air/oxygen + char, (2) Hydrogen+char  and (3) steam + char, the products of interest are H2 and CH4, this is at a laboratory scale and the focus is mainly on the reaction kinetics. The pollutant gases are presumably are SOx and the NOx gases.

Main Reactions

C + xO2	 =	2(1-x) CO + (2x - 1) CO2

C + H2O	=	CO + H2

C + CO2	=	2CO

C + 2H2	=	CH4


Initial posting Given Below

> Hi Guys,
> The issue of pressure of operation in gasification is not very clear, when
looking say at commercial gasifiers what sort of pressure are we looking
at.? The other thing is does anyone have documented stuff to show that the
use of high pressure makes it possible to attain conversion of the carbon to
gas at relatively lower temperatures? It is also believed in some circles
that as a result of lower temperatures of operation in gasification
pollutant gases which are normally liberated in combustion remain trapped,
hence the sudden change from combustion to gasification based technologies.
>
> Regards
> Rufaro..



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