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Influence of dryer type on the performance of a biomass gasification combined cycle co-located with an integrated pulp and paper mill

Johan Isaksson (Institutionen för energi och miljö, Värmeteknik och maskinlära) ; Anders Åsblad ; Thore Berntsson (Institutionen för energi och miljö, Värmeteknik och maskinlära)
Biomass & Bioenergy (0961-9534). Vol. 59 (2013), p. 336-347.
[Artikel, refereegranskad vetenskaplig]

Integration of biomass gasification with a pulp and paper mill is a possible route to create more value-added products. This route facilitates, for example, more advanced electricity generation and production of biomass based transportation fuels or chemical feedstock. Each unit operation in such a process affects overall efficiency as well as possibilities for process integration. In this paper, the impact of different dryer types in a biomass gasification combined cycle (BIGCC) has been evaluated in terms of efficiency and economic performance. The BIGCC was sized so that the excess heat would replace the current steam production from bark and oil. The results show that the dryer type can have a significant impact on economic performance and efficiencies. A BIGCC with an integrated belt dryer, utilizing excess heat to heat the drying air from the mill, can result in electrical efficiencies of up to around 40%, while e.g. a steam dryer can reach 36e37%. Choice of oxidant, air or oxygen, in the gasifier affects both capital and operational cost. Air was proven to be the most cost efficient solution for the cases evaluated in this study. The investment of around 100 to 140 million Euros for a BIGCC facility is profitable for most evaluated cases for an annuity factor of 0.1, while the net annual profit is negative for most cases when the annuity factor was increased to 0.2, even when including financial support for renewable electricity.

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Denna post skapades 2013-12-19. Senast ändrad 2014-09-29.
CPL Pubid: 190148


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Institutioner (Chalmers)

Institutionen för energi och miljö, Värmeteknik och maskinlära (2005-2014)


Hållbar utveckling
Termisk energiteknik

Chalmers infrastruktur

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Denna publikation ingår i:

Biomass Gasification-Based Biorefineries in Pulp and Paper Mills – Greenhouse Gas Emission Implications and Economic Performance