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51313-02133-Internal Corrosion of CO2 Pipelines for Carbon Capture and Storage

Picture for Internal Corrosion of CO2 Pipelines for Carbon Capture and Storage
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Product Number: 51313-02133-SG
ISBN: 02133 2013 CP
Author: Samson Son Sim
Publication Date: 2013
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Capturing and storage of anthropogenic CO2 requires the transport of CO2 with varying combinations of impurities depending on the capture technology and source. Traditional pipelines are not designed for the transport of such relatively low purity CO2 in fact initial research indicates that a low-purity CO2 environment poses a significant durability risk to conventional (gas) pipelines. If there is water present in a supercritical CO2 stream it will lead to acidic conditions via the formation of carbonic acid. In this work a series of experiments has been executed in aqueous solutions where CO2 has been added to water to form carbonic acid in-situ along with testing in sulfuric acid that was found to simulate the impact of carbonic acid upon steel. The role of Cl- NO3- and SO42- impurities was also investigated. Conclusions have been drawn from electrochemical weight loss and optical profilometry results with future work outlined and whilst not a replacement to supercritical CO2 experiments we see that there is significant merit in such high throughput tests to form an initial understanding which can be subsequently benchmarked by supercritical CO2 tests.

Capturing and storage of anthropogenic CO2 requires the transport of CO2 with varying combinations of impurities depending on the capture technology and source. Traditional pipelines are not designed for the transport of such relatively low purity CO2 in fact initial research indicates that a low-purity CO2 environment poses a significant durability risk to conventional (gas) pipelines. If there is water present in a supercritical CO2 stream it will lead to acidic conditions via the formation of carbonic acid. In this work a series of experiments has been executed in aqueous solutions where CO2 has been added to water to form carbonic acid in-situ along with testing in sulfuric acid that was found to simulate the impact of carbonic acid upon steel. The role of Cl- NO3- and SO42- impurities was also investigated. Conclusions have been drawn from electrochemical weight loss and optical profilometry results with future work outlined and whilst not a replacement to supercritical CO2 experiments we see that there is significant merit in such high throughput tests to form an initial understanding which can be subsequently benchmarked by supercritical CO2 tests.

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