Abstract
A process, in which the hydrogen sulfide formed during
black
liquor gasifi cation is absorbed into green liquor, was
assessed. In
particular, the stoichiometry and equilibria of the
pertinent
reactions were examined. The process was determined to be
feasible
at elevated pressures, except possibly for gasification
processes with
low yields of hydrogen sulfide . A condition is that, in
the
absorber, the mass transfer resistance in the gas phase
is low. In all
cases, the predicted lime requirement for
recausticization of the
final green liquor was higher than that of the
conventional
recovery process. Implications for the mill energy
balance were
evaluated.
| Original language | English |
|---|---|
| Place of Publication | Espoo |
| Publisher | VTT Technical Research Centre of Finland |
| Number of pages | 32 |
| ISBN (Print) | 951-38-4412-9 |
| Publication status | Published - 1994 |
| MoE publication type | Not Eligible |
Publication series
| Series | VTT Publications |
|---|---|
| Number | 174 |
| ISSN | 1235-0621 |
Keywords
- black liquor
- gasification
- hydrogen sulfide
- recovery
- absorption
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Cite this
McKeough, P. (1994). Recovery of hydrogen sulfide formed during black liquor gasification. VTT Technical Research Centre of Finland. VTT Publications, No. 174