Carbon dioxide capture from pulp mill using 2-amino-2-methyl-1-propanol and monoethanolamine blend: Techno-economic assessment of advanced process configuration

This project study involves the techno-economic assessment of two new advanced configurations for amine based carbon dioxide capture from a pulp mill. The newly proposed advanced configurations include advanced rich amine four split (ARA4S), and advanced rich amine three split with desorber inter-heating (ARA3S-DI) which is aimed at reducing carbon capture cost and carbon emissions. The rate-based model in ProMax (R) 4.0 was used for the simulation study while the flue gas was provided by a 365,000 air dry tonne of pulp (ADt Pulp) per annum pulp mill in British Columbia, Canada. Comparative analysis revealed that the Capture Cost (US$/tCO(2) and US$/ADt Pulp) of the 5 kmol/m(3) MEA system was lowest for the conventional configuration, while for the 2 kmol/m(3) AMP-3 kmol/m(3) MEA blend it was lowest for the advanced rich amine 3-split with desorber inter heating configuration. In addition, the Capture Costs of the MEA solution with a conventional configuration system is 8.7% higher than the AMP-MEA blend with advanced rich amine three split with desorber inter-heating configuration. Sensitivity analysis revealed that the combined effect of a carbon tax (US$ 40/tCO(2)), CO2 sales price (US$ 40/tCO(2)) and advanced configuration only led to a slight increase (2.6% for MBA and 2.1% for AMP-MEA blend) in the price of the northern bleached softwood kraft pulp. With an even better-performing solvent system and process configuration, the price of NBSK pulp may not be affected given the indicated CO2 tax and CO2 price regime.