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Title: Performance evaluation of trimethylamine-carbon dioxide thermolytic draw solution for engineered osmosis

Abstract

We evaluated the performance of trimethylamine-carbon dioxide (TMA-CO2) as a potential thermolytic draw solution for engineered osmosis. Water flux and reverse solute flux with TMA-CO2 draw solution were measured in forward osmosis (FO) and pressure retarded osmosis (PRO) modes using thin-film composite (TFC) and cellulose triacetate (CTA) FO membranes. Water flux with the TMA-CO2 draw solution was comparable to that obtained with the more common ammonia-carbon dioxide (NH3-CO2) thermolytic draw solution at similar (1 M) concentration. Using a TFC-FO membrane, the water fluxes produced by 1 M TMA-CO2 and NH3-CO2 draw solutions with a DI water feed were, respectively, 33.4 and 35.6 L m(-2) h(-1) in PRO mode and 14.5 and 152 L m(-2) h(-1) in FO mode. Reverse draw permeation of TMA-CO2 was relatively low compared to NH3-CO2, ranging from 0.1 to 0.2 mol m(-2) h(-1) in all experiments, due to the larger molecular size of TMA. Thermal separation and recovery efficiency for TMA-CO2 was compared to NH3-CO2 by modeling low-temperature vacuum distillation utilizing low-grade heat sources. We also discuss possible challenges in the use TMA-CO2, including potential adverse impact on human health and environments. (C) 2014 Elsevier B.V. All rights reserved.

Authors:
; ;
Publication Date:
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1211088
DOE Contract Number:  
DE-AR0000306
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Membrane Science; Journal Volume: 473
Country of Publication:
United States
Language:
English

Citation Formats

Boo, C, Khalil, YF, and Elimelech, M. Performance evaluation of trimethylamine-carbon dioxide thermolytic draw solution for engineered osmosis. United States: N. p., 2015. Web. doi:10.1016/j.memsci.2014.09.026.
Boo, C, Khalil, YF, & Elimelech, M. Performance evaluation of trimethylamine-carbon dioxide thermolytic draw solution for engineered osmosis. United States. doi:10.1016/j.memsci.2014.09.026.
Boo, C, Khalil, YF, and Elimelech, M. Thu . "Performance evaluation of trimethylamine-carbon dioxide thermolytic draw solution for engineered osmosis". United States. doi:10.1016/j.memsci.2014.09.026.
@article{osti_1211088,
title = {Performance evaluation of trimethylamine-carbon dioxide thermolytic draw solution for engineered osmosis},
author = {Boo, C and Khalil, YF and Elimelech, M},
abstractNote = {We evaluated the performance of trimethylamine-carbon dioxide (TMA-CO2) as a potential thermolytic draw solution for engineered osmosis. Water flux and reverse solute flux with TMA-CO2 draw solution were measured in forward osmosis (FO) and pressure retarded osmosis (PRO) modes using thin-film composite (TFC) and cellulose triacetate (CTA) FO membranes. Water flux with the TMA-CO2 draw solution was comparable to that obtained with the more common ammonia-carbon dioxide (NH3-CO2) thermolytic draw solution at similar (1 M) concentration. Using a TFC-FO membrane, the water fluxes produced by 1 M TMA-CO2 and NH3-CO2 draw solutions with a DI water feed were, respectively, 33.4 and 35.6 L m(-2) h(-1) in PRO mode and 14.5 and 152 L m(-2) h(-1) in FO mode. Reverse draw permeation of TMA-CO2 was relatively low compared to NH3-CO2, ranging from 0.1 to 0.2 mol m(-2) h(-1) in all experiments, due to the larger molecular size of TMA. Thermal separation and recovery efficiency for TMA-CO2 was compared to NH3-CO2 by modeling low-temperature vacuum distillation utilizing low-grade heat sources. We also discuss possible challenges in the use TMA-CO2, including potential adverse impact on human health and environments. (C) 2014 Elsevier B.V. All rights reserved.},
doi = {10.1016/j.memsci.2014.09.026},
journal = {Journal of Membrane Science},
number = ,
volume = 473,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 2015},
month = {Thu Jan 01 00:00:00 EST 2015}
}