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Correction Cite This: Environ. Sci. Technol. Lett. XXXX, XXX, XXX−XXX
pubs.acs.org/journal/estlcu
Correction to Low-Temperature Carbon Capture Using Aqueous Ammonia and Organic Solvents Ethan J. Novek, Evyatar Shaulsky, Zachary S. Fishman, Lisa D. Pfefferle, and Menachem Elimelech* Environ. Sci. Technol. Lett. 2016, 3 (8), 291−296. DOI: 10.1021/acs.estlett.6b00253
F
igure 3 compares the energy and temperature values of the CO2 capture technology introduced in this paper with values from conventional CO2 capture technologies: MEA and chilled ammonia. In Figure 3, a reboiler temperature of 140 °C is incorrectly associated with a reboiler duty of 13 MJ/kg of CO2 for MEA. The reboiler duty of MEA in the figure represents an MEA process that uses an additional vacuum to operate at a reboiler temperature of 94 °C.1 At a reboiler temperature of 140 °C, standard MEA processes consume ∼3.7 MJ/kg of CO2 captured.2,3 With this correction, the DMM and acetone versions of the process introduced in this work require more regeneration energy than the MEA process does but continue to require lower temperatures. Notably, the acetaldehyde version of our technology continues to require temperatures and a regeneration energy lower than those of the MEA and chilled ammonia processes. The overarching conclusions of this work are not affected by this correction. First, current CO2 capture processes require high-temperature heat, generally supplied by steam diverted from power generation. Second, the process introduced in this work regenerates at lower temperatures, enabling the use of abundant low-temperature waste heat. Lastly, the acetaldehyde version of the process introduced in this work requires less regeneration energy and lower temperatures than current processes do.
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REFERENCES
(1) Dugas, R. E. Pilot plant study of carbon dioxide capture by aqueous monoethanolamine. MSE Thesis, The University of Texas at Austin, Austin, TX, 2006. (2) Songolzadeh, M.; Soleimani, M.; Takht Ravanchi, M.; Songolzadeh, R. Carbon dioxide separation from flue gases: a technological review emphasizing reduction in greenhouse gas emissions. Sci. World J. 2014, 2014, 1−34. (3) Mangalapally, H. P.; Notz, R.; Hoch, S.; Asprion, N.; Sieder, G.; Garcia, H.; Hasse, H. Pilot plant experimental studies of post combustion CO2 capture by reactive absorption with MEA and new solvents. Energy Procedia 2009, 1 (1), 963−970.
Received: February 5, 2018 Accepted: February 6, 2018
© 2016 American Chemical Society
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DOI: 10.1021/acs.estlett.8b00062 Environ. Sci. Technol. Lett. XXXX, XXX, XXX−XXX
