Résumé: This paper investigates the impact of combining CO<subscript>2 capture and storage with alternative systems for biomass-based combined heat and power production (CHP) in Kraft pulp and paper mills. We compare heat, power, and CO<subscript>2 balances of systems with alternative configurations of the CHP and CO<subscript>2-capture systems. Because the captured CO<subscript>2 comes from renewable biomass, the studied systems yield negative CO<subscript>2 emissions. It is shown that pulp mills and integrated pulp and paper mills have the potential to become net exporters of biomass-based electricity while at the same time removing CO<subscript>2 from the atmosphere on a net basis. The study shows that that the overall best CO<subscript>2 abatement is achieved when CO<subscript>2 capture is carried out within a biomass integrated gasifier with combined cycle where the syngas undergoes a CO-shift reaction. This configuration combines efficient energy conversion with a high CO<subscript>2 capture efficiency. Furthermore, cost curves are constructed, which show how the cost of CO<subscript>2 capture and storage in pulp and paper mills depends on system configuration and the CO<subscript>2 transportation distance.

Langue: Anglais