Optimising carbon capture and solids recovery using seawater reverse osmosis desalination brine

There is an urgent need to reduce carbon emissions globally to curb the worsening climate change. It is also important to cause minimal disruption to current processes in the short term to limit job loss. Concurrently, there is also a need to address the increasing volume of desalination brine that...

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Main Author: Oo, Guoxuan
Other Authors: Grzegorz Lisak
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2024
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Online Access:https://hdl.handle.net/10356/176354
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spelling sg-ntu-dr.10356-1763542024-05-17T15:34:49Z Optimising carbon capture and solids recovery using seawater reverse osmosis desalination brine Oo, Guoxuan Grzegorz Lisak School of Civil and Environmental Engineering Residues and Resource Reclamation Centre g.lisak@ntu.edu.sg Engineering Carbon capture Desalination brine There is an urgent need to reduce carbon emissions globally to curb the worsening climate change. It is also important to cause minimal disruption to current processes in the short term to limit job loss. Concurrently, there is also a need to address the increasing volume of desalination brine that has an adverse impact on the environment due to its high salinity. The potential solution to both problems is carbon capture using desalination brine. The focus of this paper is on pretreatment of brine for chlor-alkali process. This paper found the optimal final pH for sequential addition of NaOH and bubbling of CO2 to be 12.5 and 11.5, respectively. At these pH values, the formation of calcium carbonate was maximised, maximising the carbon capture aspect of brine pretreatment, resulting in near 100% Ca and Mg removal. Optimal pH of alternative alkali for pretreatment of brine at 25°C were also identified: pH 10.5 for sodium carbonate, corresponding to 95% Ca and 75% Mg removal; and pH 7.9 for sodium bicarbonate, corresponding to 97% Ca and 38% Mg removal. These parameters serve as a guide for system design for large scale desalination brine treatment and carbon capture system. Bachelor's degree 2024-05-16T05:46:10Z 2024-05-16T05:46:10Z 2024 Final Year Project (FYP) Oo, G. (2024). Optimising carbon capture and solids recovery using seawater reverse osmosis desalination brine. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/176354 https://hdl.handle.net/10356/176354 en EN-09 application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering
Carbon capture
Desalination brine
spellingShingle Engineering
Carbon capture
Desalination brine
Oo, Guoxuan
Optimising carbon capture and solids recovery using seawater reverse osmosis desalination brine
description There is an urgent need to reduce carbon emissions globally to curb the worsening climate change. It is also important to cause minimal disruption to current processes in the short term to limit job loss. Concurrently, there is also a need to address the increasing volume of desalination brine that has an adverse impact on the environment due to its high salinity. The potential solution to both problems is carbon capture using desalination brine. The focus of this paper is on pretreatment of brine for chlor-alkali process. This paper found the optimal final pH for sequential addition of NaOH and bubbling of CO2 to be 12.5 and 11.5, respectively. At these pH values, the formation of calcium carbonate was maximised, maximising the carbon capture aspect of brine pretreatment, resulting in near 100% Ca and Mg removal. Optimal pH of alternative alkali for pretreatment of brine at 25°C were also identified: pH 10.5 for sodium carbonate, corresponding to 95% Ca and 75% Mg removal; and pH 7.9 for sodium bicarbonate, corresponding to 97% Ca and 38% Mg removal. These parameters serve as a guide for system design for large scale desalination brine treatment and carbon capture system.
author2 Grzegorz Lisak
author_facet Grzegorz Lisak
Oo, Guoxuan
format Final Year Project
author Oo, Guoxuan
author_sort Oo, Guoxuan
title Optimising carbon capture and solids recovery using seawater reverse osmosis desalination brine
title_short Optimising carbon capture and solids recovery using seawater reverse osmosis desalination brine
title_full Optimising carbon capture and solids recovery using seawater reverse osmosis desalination brine
title_fullStr Optimising carbon capture and solids recovery using seawater reverse osmosis desalination brine
title_full_unstemmed Optimising carbon capture and solids recovery using seawater reverse osmosis desalination brine
title_sort optimising carbon capture and solids recovery using seawater reverse osmosis desalination brine
publisher Nanyang Technological University
publishDate 2024
url https://hdl.handle.net/10356/176354
_version_ 1806059880920907776