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Title: Techno-Economic Analysis of Magnesium Extraction from Seawater via a Catalyzed Organo-Metathetical Process

Abstract

Magnesium (Mg) has many useful applications especially in various Mg alloys which can decrease weight while increasing strength. To increase the affordability and minimize environment consequence, a novel catalyzed organo-metathetical (COMET) process was proposed to extract Mg from seawater aiming to achieve significant reduction in total energy and production cost comparing with the melting salt electrolysis method currently adopted by US Mg LLC. A process flowsheet for a reference COMET process was set-up using Aspen Plus which included five key steps, anhydrous MgCl2 production, transmetallation, dibutyl Mg decomposition, n-BuLi regeneration, and LiCL electrolysis. The energy and production cost and CO2 emission were estimated based on the Aspen modeling using Aspen economic analyzer. Our results showed that it is possible to produce Mg from seawater with a production cost of $2.0/kg-Mg while consuming about 35.3 kWh/kg-Mg and releasing 7.0 kg CO2/kg-Mg. A simplified US Mg manufacturing process was also generated using Aspen and the cost and emission results were estimated for comparison purpose. Under our simulation conditions, the reference COMET process maintain a comparable CO2 emission rate and can save about 40% in production cost and save about 15% energy compared to the simplified US Mg process.

Authors:
ORCiD logo; ; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1427911
Report Number(s):
PNNL-SA-119113
Journal ID: ISSN 1047-4838; CJ0100000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
JOM. Journal of the Minerals, Metals & Materials Society
Additional Journal Information:
Journal Volume: 70; Journal Issue: 3; Journal ID: ISSN 1047-4838
Publisher:
Springer
Country of Publication:
United States
Language:
English

Citation Formats

Liu, Jian, Bearden, Mark D., Fernandez, Carlos A., Fifield, Leonard S., Nune, Satish K., Motkuri, Radha K., Koech, Philip K., and McGrail, B. Pete. Techno-Economic Analysis of Magnesium Extraction from Seawater via a Catalyzed Organo-Metathetical Process. United States: N. p., 2018. Web. doi:10.1007/s11837-017-2735-6.
Liu, Jian, Bearden, Mark D., Fernandez, Carlos A., Fifield, Leonard S., Nune, Satish K., Motkuri, Radha K., Koech, Philip K., & McGrail, B. Pete. Techno-Economic Analysis of Magnesium Extraction from Seawater via a Catalyzed Organo-Metathetical Process. United States. doi:10.1007/s11837-017-2735-6.
Liu, Jian, Bearden, Mark D., Fernandez, Carlos A., Fifield, Leonard S., Nune, Satish K., Motkuri, Radha K., Koech, Philip K., and McGrail, B. Pete. Tue . "Techno-Economic Analysis of Magnesium Extraction from Seawater via a Catalyzed Organo-Metathetical Process". United States. doi:10.1007/s11837-017-2735-6.
@article{osti_1427911,
title = {Techno-Economic Analysis of Magnesium Extraction from Seawater via a Catalyzed Organo-Metathetical Process},
author = {Liu, Jian and Bearden, Mark D. and Fernandez, Carlos A. and Fifield, Leonard S. and Nune, Satish K. and Motkuri, Radha K. and Koech, Philip K. and McGrail, B. Pete},
abstractNote = {Magnesium (Mg) has many useful applications especially in various Mg alloys which can decrease weight while increasing strength. To increase the affordability and minimize environment consequence, a novel catalyzed organo-metathetical (COMET) process was proposed to extract Mg from seawater aiming to achieve significant reduction in total energy and production cost comparing with the melting salt electrolysis method currently adopted by US Mg LLC. A process flowsheet for a reference COMET process was set-up using Aspen Plus which included five key steps, anhydrous MgCl2 production, transmetallation, dibutyl Mg decomposition, n-BuLi regeneration, and LiCL electrolysis. The energy and production cost and CO2 emission were estimated based on the Aspen modeling using Aspen economic analyzer. Our results showed that it is possible to produce Mg from seawater with a production cost of $2.0/kg-Mg while consuming about 35.3 kWh/kg-Mg and releasing 7.0 kg CO2/kg-Mg. A simplified US Mg manufacturing process was also generated using Aspen and the cost and emission results were estimated for comparison purpose. Under our simulation conditions, the reference COMET process maintain a comparable CO2 emission rate and can save about 40% in production cost and save about 15% energy compared to the simplified US Mg process.},
doi = {10.1007/s11837-017-2735-6},
journal = {JOM. Journal of the Minerals, Metals & Materials Society},
issn = {1047-4838},
number = 3,
volume = 70,
place = {United States},
year = {2018},
month = {1}
}

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