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Performance of large-scale biomass gasifiers in a biorefinery, a state-of-the-art reference

Alberto Alamia (Institutionen för energi och miljö, Energiteknik) ; Anton Larsson (Institutionen för energi och miljö, Energiteknik, Chalmers förgasare) ; Claes Breitholtz ; Henrik Thunman (Institutionen för energi och miljö, Energiteknik, Chalmers förgasare)
International Journal of Energy Research (0363-907X). (2017)
[Artikel, refereegranskad vetenskaplig]

© 2017 The Authors.The Gothenburg Biomass Gasification plant (2015) is currently the largest plant in the world producing biomethane (20 MWbiomethane) from woody biomass. We present the experimental data from the first measurement campaign and evaluate the mass and energy balances of the gasification sections at the plant. Measures improving the efficiency including the use of additives (potassium and sulfur), high-temperature pre-heating of the inlet streams, improved insulation of the reactors, drying of the biomass and introduction of electricity as a heat source (power-to-gas) are investigated with simulations. The cold gas efficiency was calculated in 71.7%LHVdaf using dried biomass (8% moist). The gasifier reaches high fuel conversion, with char gasification of 54%, and the fraction of the volatiles is converted to methane of 34%mass. Because of the design, the heat losses are significant (5.2%LHVdaf), which affect the efficiency. The combination of potential improvements can increase the cold gas efficiency to 83.5%LHVdaf, which is technically feasible in a commercial plant. The experience gained from the Gothenburg Biomass Gasification plant reveals the strong potential biomass gasification at large scale.

Nyckelord: Biomass gasification , Biomethane , Dual fluidized bed , GoBiGas , Mass balance , Power-to-gas , SNG



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Denna post skapades 2017-07-03. Senast ändrad 2017-07-03.
CPL Pubid: 250342

 

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Institutioner (Chalmers)

Institutionen för energi och miljö, Energiteknik (2005-2017)
Institutionen för energi och miljö, Energiteknik, Chalmers förgasare (2007-2017)

Ämnesområden

Energi
Hållbar utveckling
Mekanisk energiteknik
Termisk energiteknik
Kemisk energiteknik
Energisystem

Chalmers infrastruktur