Continuous process for the aqueous carbonation of serpentinite leachate derived from carbonic acid
We present a modelling approach for the continuous aqueous carbonation of serpentinite leachate derived from carbonic acid, suitable for practical application to large-scale CO2sequestration. Experiments involved bubbling of gaseous carbon dioxide (CO2) at a partial pressure of 1 bar into an aqueous...
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ftmurdochunivall:oai:alma.61MUN_INST:11136280610007891 2024-09-15T18:01:37+00:00 Continuous process for the aqueous carbonation of serpentinite leachate derived from carbonic acid Oliver, T.K. Dlugogorski, B.Z. Kennedy, E.M. 2015 http://www3.aiche.org/Proceedings/Abstract.aspx?PaperID=397416 https://researchportal.murdoch.edu.au/esploro/outputs/conferencePaper/Continuous-process-for-the-aqueous-carbonation/991005544097907891 eng eng http://www3.aiche.org/Proceedings/Abstract.aspx?PaperID=397416 991005544097907891 https://researchportal.murdoch.edu.au/esploro/outputs/conferencePaper/Continuous-process-for-the-aqueous-carbonation/991005544097907891 alma:61MUN_INST/bibs/991005544097907891 © 2015 The Authors. event Conference Paper 2015 ftmurdochunivall 2024-08-15T00:52:49Z We present a modelling approach for the continuous aqueous carbonation of serpentinite leachate derived from carbonic acid, suitable for practical application to large-scale CO2sequestration. Experiments involved bubbling of gaseous carbon dioxide (CO2) at a partial pressure of 1 bar into an aqueous suspension of thermally activated serpentinite. Isothermal heating of the ground mineral (-53 μm) at 720 °C for a total period of 30 min resulted in a reactive mineral showing some development of forsterite from the predominantly antigorite basis, with residual hydroxyl content of 53.9 %. An Avrami-Erofe'ev solid state model was fitted to early stage dissolution data (<10 % Mg extraction) and this was used in conjunction with a kinetic formulation of the carbonate system to model continuous mineral dissolution. Dissolution over a contact time of 5 min was sufficient to produce an alkalised solution that was then degassed in a batch operation at 30°C yielding nesquehonite. X-ray powder diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses were used to assess changes to the heat activated serpentinite prior to and following dissolution. ICP-OES analysis, and alkalinity measurements were used to estimate magnesium (Mg) and carbon elemental balances. Conference Object Carbonic acid Murdoch University Research Portal |
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English |
description |
We present a modelling approach for the continuous aqueous carbonation of serpentinite leachate derived from carbonic acid, suitable for practical application to large-scale CO2sequestration. Experiments involved bubbling of gaseous carbon dioxide (CO2) at a partial pressure of 1 bar into an aqueous suspension of thermally activated serpentinite. Isothermal heating of the ground mineral (-53 μm) at 720 °C for a total period of 30 min resulted in a reactive mineral showing some development of forsterite from the predominantly antigorite basis, with residual hydroxyl content of 53.9 %. An Avrami-Erofe'ev solid state model was fitted to early stage dissolution data (<10 % Mg extraction) and this was used in conjunction with a kinetic formulation of the carbonate system to model continuous mineral dissolution. Dissolution over a contact time of 5 min was sufficient to produce an alkalised solution that was then degassed in a batch operation at 30°C yielding nesquehonite. X-ray powder diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses were used to assess changes to the heat activated serpentinite prior to and following dissolution. ICP-OES analysis, and alkalinity measurements were used to estimate magnesium (Mg) and carbon elemental balances. |
format |
Conference Object |
author |
Oliver, T.K. Dlugogorski, B.Z. Kennedy, E.M. |
spellingShingle |
Oliver, T.K. Dlugogorski, B.Z. Kennedy, E.M. Continuous process for the aqueous carbonation of serpentinite leachate derived from carbonic acid |
author_facet |
Oliver, T.K. Dlugogorski, B.Z. Kennedy, E.M. |
author_sort |
Oliver, T.K. |
title |
Continuous process for the aqueous carbonation of serpentinite leachate derived from carbonic acid |
title_short |
Continuous process for the aqueous carbonation of serpentinite leachate derived from carbonic acid |
title_full |
Continuous process for the aqueous carbonation of serpentinite leachate derived from carbonic acid |
title_fullStr |
Continuous process for the aqueous carbonation of serpentinite leachate derived from carbonic acid |
title_full_unstemmed |
Continuous process for the aqueous carbonation of serpentinite leachate derived from carbonic acid |
title_sort |
continuous process for the aqueous carbonation of serpentinite leachate derived from carbonic acid |
publishDate |
2015 |
url |
http://www3.aiche.org/Proceedings/Abstract.aspx?PaperID=397416 https://researchportal.murdoch.edu.au/esploro/outputs/conferencePaper/Continuous-process-for-the-aqueous-carbonation/991005544097907891 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_relation |
http://www3.aiche.org/Proceedings/Abstract.aspx?PaperID=397416 991005544097907891 https://researchportal.murdoch.edu.au/esploro/outputs/conferencePaper/Continuous-process-for-the-aqueous-carbonation/991005544097907891 alma:61MUN_INST/bibs/991005544097907891 |
op_rights |
© 2015 The Authors. |
_version_ |
1810438723080290304 |