Integrated Black Liquor Gasification Polygeneration System with CO2Capture in Pulp and Paper Mills to Produce Methanol and Electricity
- 9 March 2011
- journal article
- research article
- Published by Taylor & Francis Ltd in International Journal of Green Energy
- Vol. 8 (2), 275-293
- https://doi.org/10.1080/15435075.2010.550077
Abstract
Based on KAM a aThe eco-cyclic pulp mill—KAM—a Swedish national research and development program, is a reference kraft pulp mill based on the best available technology in Sweden and Finland. View all notes pulp and paper mill, a polygeneration system integrated with a black liquor gasifier is proposed. The effects of CO2 captured by oxygen-fuel combustion and Selexol absorption on the performance of the polygeneration system are studied in terms of both thermodynamic performance and cost assessment. Using the Aspen Plus simulator, the performance of the studied polygeneration systems are analyzed from the perspectives of the first and second laws of thermodynamics. Compared with the reference system, the first law efficiency of the polygeneration system increased from 15.7% to 29.3%, with an investment increment of 17.9%. The investment incremental rates for CO2 capture by oxyfuel combustion and Selexol absorption are 15.1% and 16.7%, respectively. Energy penalty due to CO2 capture and compression is 0.61 MJ electricity/kg CO2, avoided in the oxygen-fuel method at a cost of $29.6/tonne CO2. However, energy penalty can reach 1.03 MJ product (electricity and methanol) per kg CO2, avoided in the Selexol absorption CO2 capture process at a cost of $46.0/tonne CO2.Keywords
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