Integration Of Biomass Gasification With A Scandinavian Mechanical Pulp And Paper Mill - Consequences For Mass And Energy Balances And Global CO2 Emissions

• The Scandinavian mechanical pulp and paper industry has been facing great challenges during the pastdecades, mainly because of declining demand for newsprint, and higher prices on raw material andenergy. One way of increasing profitability is to produce more value-added products besides theproduction of pulp and paper. In this study, integration potentials of three possible future biomassgasification-based energy mills with an existing thermo-mechanical pulp (TMP) mill, co-located witha sawmill, have been evaluated. The product gas was utilized for electricity production in a gas turbine,for production of methanol or for production of FischereTropsch (FT) liquids. Integration of the energymills showed good potential as the TMP mill constitutes a heat sink for which the excess heat from theenergy mills can be utilized all year round. However, since there is little excess heat from the TMP mill atthe required level to be utilized for biomass drying, for example, heat integration is typically one way. Ithas also been shown that integration of biomass gasification with a TMP mill results in larger CO2emissions reduction than stand-alone operation. Still, compared to co-firing biomass in a coal powerplant, the energy mills all have lower potentials for CO2 emissions reduction.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Energiteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Energy Engineering (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Kemiteknik -- Kemiska processer (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Chemical Engineering -- Chemical Process Engineering (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Naturresursteknik -- Energisystem (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Environmental Engineering -- Energy Systems (hsv//eng)

Nyckelord

CO2 emissions

Thermo-mechanical pulp and paper mill

Biorefinery

Process integration

Biomass gasification

Energy efficiency

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