A Case Study of Partial Capture of CO2 From a Pulp Mill – The CO2 Capture Cost

Paper i proceeding, 2018

This work presents a detailed cost estimation of carbon capture from a modern kraft pulp mill. Both the lime kiln and the recovery boiler have been studied as CO2 sources by using several alternatives for suppling steam to to power the capture unit. The results show that a considerably lower specific capture cost can be achieved with partial capture of CO2. In partial pressure the fraction of CO2 that is captured is controlled by the amount of available energy at “low” cost. The cost of partial capture and compression of CO2 to 110 bar resulted in 41 €/t compared to 56 €/t CO2 captured for a full capture case. The cost for electricity, including subsidies for renewable electricity generation, and steam is important to the results.