Comparative life cycle assessment of potassium carbonate and monoethanolamine solvents for CO2 capture from post combustion flue gases

被引：0
|
作者：
Grant, Tim [1 ]
Anderson, Clare [2 ]
Hooper, Barry [2 ]
机构：
[1] Life Cycle Strategies, Melbourne, VIC 3000, Australia
[2] The Cooperative Research Centre for Greenhouse Gas Technologies (CO2CRC), Department of Chemical and Biomolecular Engineering, The University of Melbourne, VIC 3055, Australia
来源：
International Journal of Greenhouse Gas Control | 2014年 / 28卷
关键词：
Carbon capture and storage (CCS) has the potential to enable significant reductions in carbon dioxide (CO2) emissions from stationary sources such as coal-fired power stations. The most advanced carbon capture technology is CO2 absorption using amine-based solvents; such as monoethanolamine (MEA). However; there is concern that the increased use of amine-based solvents will lead to other potential negative environmental impacts; such as increased human toxicity. The use of benign inorganic solvents; such as potassium carbonate; which do not degrade in the presence of oxygen or other impurities such as sulphurous or nitrous oxides offer significant advantages over amine-based solvents in terms of environmental impact.A comparative life cycle assessment (LCA) between the use of MEA and the CO2CRC's potassium carbonate based UNO MK 3 technology for the capture of 1tonne of CO2 from a brown-coal fired power station has been completed. The results reveal that the UNO MK 3 process is significantly better than MEA on ecotoxicity and carcinogen emissions and substantially better on all other indicators. The benefits of the UNO MK 3 process compared with MEA are due to avoidance of emissions from MEA degradation along with the savings in energy use for CO2 removal.The significant environmental benefits of the UNO MK 3 process compared with MEA were not altered by an uncertainty analysis or sensitivity analysis of key inputs and assumptions. © 2014 Elsevier Ltd;
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页码：35 / 44
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