[Gasification] one question about the mass franction of carbon in the final solid residu at the outlet of a gasification plant
chen at sol3d.com
Tue Jan 11 10:14:28 CST 2011
I recently find that the french law requires that the mass fraction of
unburned carbon that found in the final solid residu coming from a waste
gasifier should be less than 3%. If I take wood with a ash content of
1%m as example:
At the inlet of gasifier: 1000 g wood contains about 500 g C and 10 g ash.
At the outlet of gasifier: 10 g ash is assumed remained in solid, and if
C% must be < 3% , --> only 0.3g carbon is allowed in solid.
This law is not applied to the gasifier treating propre wood and
agricole wastes. Even though, this law suprised me a lot. With a single
gasifier, it is possible to gasify all the carbon contained in the
initial wastes? or in the case of waste, a post combustor should be used
in order to meet this requirement.....
Anyway, I'd like to know does everybody have the information of
currently running commercial plants or demontrators about
1. what is the mass fraction of carbon in the solid (NOT the ratio
between C in the solid residu and C in the initial biomass)?
2. What is the feedstocks
3. Does this plant use a post combustor in order to burn the solid
residu? (but in this case, it means that ash should entre in the post
I will be appreciated if some of you participe this discussion.
Dr Li CHEN
S3d - Solutions Déchets& Développement Durable
9 rue Alfred Kastler
44307 Nantes Cedex 3
Tel. : +33(0)2 51 13 54 54
Mob. : +33(0)6 32 06 17 41
Fax : +33(0)2 51 13 57 65
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