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Techno‐economic assessment of CO 2 capture from aluminum smelter emissions using PZ activated AMP solutions
Author(s) -
Lassagne Olivier,
Iliuta Maria C.,
Gosselin Louis,
Désilets Martin
Publication year - 2016
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.22437
Subject(s) - greenhouse gas , activated carbon , capital cost , carbon capture and storage (timeline) , ton , chemistry , waste management , environmental science , organic chemistry , engineering , adsorption , ecology , climate change , fishery , electrical engineering , biology
In order to reduce its greenhouse gas emissions without drastically changing currently‐used processes, the primary aluminum industry will need to consider capturing CO 2 released in the electrolytic cells. In order to make the capture more economically attractive to the aluminum industry, the possibility of using a blended amine absorption solution which combines the advantages of two different amines (a fast reactivity from a cyclic polyamine, piperazine (PZ), and a high absorption capacity and low regeneration cost from a sterically‐hindered alkanolamine) is considered in this work. Specific to an aluminum plant, not only the costs and benefits of a CO 2 capture facility are evaluated, but also the possibility and cost of coupling the capture process with a waste heat recovery strategy. A mixture of 0.08 g/g PZ and 0.32 g/g AMP appears to be the most appropriate, reducing the capital costs by 25 % and operating costs by 29 % compared to the use of MEA (monoethanolamine) solutions. The capture cost is evaluated to be 65.10 $/ton of CO 2 avoided (without carbon tax). A thermal integration of the capture plant within the primary aluminum smelter could further reduce the cost to 57.57 $/ton of CO 2 avoided, or equivalently, 69.56 $/ton of Al produced (without carbon tax).