Direct and indirect aqueous mineralization using red gypsum for carbon dioxide sequestration

Carbon capture and storage is gaining prominence as a means of combating climate change. Mineral carbonation is the only known form of permanent and leakage-free carbon storage. The aim of this research was to investigate the suitability and feasibility of utilizing red gypsum as the calcium source...

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Main Author:	Azdarpour, Amin
Format:	Thesis
Language:	English
Published:	2015
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/77595/1/AminAzdarpourPFPREE2015.pdf
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spelling	my-utm-ep.775952018-06-25T08:55:21Z Direct and indirect aqueous mineralization using red gypsum for carbon dioxide sequestration 2015-01 Azdarpour, Amin TP Chemical technology Carbon capture and storage is gaining prominence as a means of combating climate change. Mineral carbonation is the only known form of permanent and leakage-free carbon storage. The aim of this research was to investigate the suitability and feasibility of utilizing red gypsum as the calcium source for the mineral carbonation process. The physico-chemical analysis of red gypsum showed that calcium and iron are its major constituents, which makes it a highly suitable and potential feedstock for mineral carbonation. The direct carbonation of red gypsum showed that both the purity of the product and the efficiency of the reaction were very low even at elevated reaction temperature and CO2 pressure. The maximum CaCO3 purity of 23.63% and carbonation efficiency of 41.04% were achieved during direct aqueous carbonation of red gypsum. The red gypsum dissolution studies showed that H2SO4 resulted in higher calcium extraction efficiency compared to HCl and HNO3. Increasing the reaction temperature from 30 °C to 70 °C and also increasing the reaction time from 5 to 120 minutes were found to be effective in enhancing the degree of extraction for all three types of acid used. The maximum of 100% and 84.6% extraction efficiency was achieved for Ca and Fe, respectively. Kinetic analysis found that the dissolution rate of red gypsum is controlled by the combination of product layer diffusion and chemical reaction control. The carbonation efficiency was found to be in direct relationship with CO2 pressure where the maximum carbonation efficiency of 100% was achieved at 8 bar CO2 pressure. The pH swing experiments resulted in CaCO3 with a maximum purity of 98%. The pH swing carbonation of red gypsum could be further investigated as a promising method for large scale CO2 sequestration. 2015-01 Thesis http://eprints.utm.my/id/eprint/77595/ http://eprints.utm.my/id/eprint/77595/1/AminAzdarpourPFPREE2015.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:97121 phd doctoral Universiti Teknologi Malaysia, Faculty of Petroleum and Renewable Energy Engineering Faculty of Petroleum and Renewable Energy Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Azdarpour, Amin Direct and indirect aqueous mineralization using red gypsum for carbon dioxide sequestration
description	Carbon capture and storage is gaining prominence as a means of combating climate change. Mineral carbonation is the only known form of permanent and leakage-free carbon storage. The aim of this research was to investigate the suitability and feasibility of utilizing red gypsum as the calcium source for the mineral carbonation process. The physico-chemical analysis of red gypsum showed that calcium and iron are its major constituents, which makes it a highly suitable and potential feedstock for mineral carbonation. The direct carbonation of red gypsum showed that both the purity of the product and the efficiency of the reaction were very low even at elevated reaction temperature and CO2 pressure. The maximum CaCO3 purity of 23.63% and carbonation efficiency of 41.04% were achieved during direct aqueous carbonation of red gypsum. The red gypsum dissolution studies showed that H2SO4 resulted in higher calcium extraction efficiency compared to HCl and HNO3. Increasing the reaction temperature from 30 °C to 70 °C and also increasing the reaction time from 5 to 120 minutes were found to be effective in enhancing the degree of extraction for all three types of acid used. The maximum of 100% and 84.6% extraction efficiency was achieved for Ca and Fe, respectively. Kinetic analysis found that the dissolution rate of red gypsum is controlled by the combination of product layer diffusion and chemical reaction control. The carbonation efficiency was found to be in direct relationship with CO2 pressure where the maximum carbonation efficiency of 100% was achieved at 8 bar CO2 pressure. The pH swing experiments resulted in CaCO3 with a maximum purity of 98%. The pH swing carbonation of red gypsum could be further investigated as a promising method for large scale CO2 sequestration.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Azdarpour, Amin
author_facet	Azdarpour, Amin
author_sort	Azdarpour, Amin
title	Direct and indirect aqueous mineralization using red gypsum for carbon dioxide sequestration
title_short	Direct and indirect aqueous mineralization using red gypsum for carbon dioxide sequestration
title_full	Direct and indirect aqueous mineralization using red gypsum for carbon dioxide sequestration
title_fullStr	Direct and indirect aqueous mineralization using red gypsum for carbon dioxide sequestration
title_full_unstemmed	Direct and indirect aqueous mineralization using red gypsum for carbon dioxide sequestration
title_sort	direct and indirect aqueous mineralization using red gypsum for carbon dioxide sequestration
granting_institution	Universiti Teknologi Malaysia, Faculty of Petroleum and Renewable Energy Engineering
granting_department	Faculty of Petroleum and Renewable Energy Engineering
publishDate	2015
url	http://eprints.utm.my/id/eprint/77595/1/AminAzdarpourPFPREE2015.pdf
_version_	1747817785670500352

Direct and indirect aqueous mineralization using red gypsum for carbon dioxide sequestration

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