Abstract
Development of a hot-gas cleanup system, especially highly efficient desulfurization technology has been studied to realize effective coal gasification plants such as advanced IGCC systems for electricity and advanced processes for high-grade hydrogen production. We have explored innovative desulfurization agents composed of zinc ferrite, metal oxides and/or metal sulfides for hot-gas cleanup processes, using simulated coal gas by an entrained-flow gasifier. It was shown that by use of the above agents, hydrogen sulfide itself is almost completely removed and that sulfur atoms of sulfuric substances such as COS involved in coal gas are also catalytically reduced to hydrogen sulfide and subsequently removed; total concentration of H2S and COS involved in the simulated coal gas could be decreased to less than detection limit (PFD/GC; 20 ppbv). The desulfurization agents can be satisfactorily used to realize advanced IGCC and IGFC plants having extremely high thermal efficiencies, and for advanced processes of high-grade hydrogen production for PEFC.
| Original language | English |
|---|---|
| Title of host publication | 25th Annual International Pittsburgh Coal Conference, PCC - Proceedings |
| Publication status | Published - 2008 |
| Event | 25th Annual International Pittsburgh Coal Conference, PCC - Pittsburgh, PA Duration: 2008 Sept 29 → 2008 Oct 2 |
Other
| Other | 25th Annual International Pittsburgh Coal Conference, PCC |
|---|---|
| City | Pittsburgh, PA |
| Period | 08/9/29 → 08/10/2 |
Keywords
- Desulfurization (agent)
- Gasification
- Hot gas cleanup
- Hydrogen production
- IGCC
- Zinc ferrite
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Environmental Engineering
