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Decomposition of carbonates in capture of carbon dioxide from ambient air Campbell, James Stephen
Abstract
Direct Air Capture (DAC) is a technology for absorbing and concentrating CO₂ from air for geological sequestration or utilization. Capture is possible using alkali hydroxide solutions, forming alkali carbonates, with regeneration using lime or hematite. The CO₂-release step in each regeneration process requires high temperature, leading to high cost. A better understanding of the kinetics could reduce temperatures and facilitate integration with sustainable energy. In lime regeneration of KOH(aq), CaCO₃(s) decomposes forming CaO(s) and CO₂(g) (+178 kJ.mol⁻¹). In this thesis it was found that all CO₂ was released by 780°C during thermogravimetric analysis (N₂(g) flow rate of 60 ml.min⁻¹, heating rate of 20 °C.min⁻¹, particle size
Item Metadata
| Title |
Decomposition of carbonates in capture of carbon dioxide from ambient air
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| Creator | |
| Publisher |
University of British Columbia
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| Date Issued |
2019
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| Description |
Direct Air Capture (DAC) is a technology for absorbing and concentrating CO₂ from air for geological sequestration or utilization. Capture is possible using alkali hydroxide solutions, forming alkali carbonates, with regeneration using lime or hematite. The CO₂-release step in each regeneration process requires high temperature, leading to high cost. A better understanding of the kinetics could reduce temperatures and facilitate integration with sustainable energy.
In lime regeneration of KOH(aq), CaCO₃(s) decomposes forming CaO(s) and CO₂(g) (+178 kJ.mol⁻¹). In this thesis it was found that all CO₂ was released by 780°C during thermogravimetric analysis (N₂(g) flow rate of 60 ml.min⁻¹, heating rate of 20 °C.min⁻¹, particle size
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| Genre | |
| Type | |
| Language |
eng
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| Date Available |
2019-12-10
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| Provider |
Vancouver : University of British Columbia Library
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| Rights |
Attribution-NoDerivatives 4.0 International
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| DOI |
10.14288/1.0387012
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| URI | |
| Degree (Theses) | |
| Program (Theses) | |
| Affiliation | |
| Degree Grantor |
University of British Columbia
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| Graduation Date |
2020-05
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| Campus | |
| Scholarly Level |
Graduate
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| Rights URI | |
| Aggregated Source Repository |
DSpace
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Rights
Attribution-NoDerivatives 4.0 International