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51313-02372-Corrosion Stability of Piping Steels in a Circulating Supercritical Impure CO2 Environment

Product Number: 51313-02372-SG
ISBN: 02372 2013 CP
Author: Oleksandra Yevtushenko
Publication Date: 2013
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In order to reduce CO2 emission into the Earth’s atmosphere new technologies for CO2 separation from flue gas and its subsequent transportation and storage are currently under development and meet the interest of scientists and industry all over the world. However the corrosion effect of impure CO2 on pipeline steels needs to be investigated in more detail.

Within the project COORAL (German acronym for “CO2 purity for capture and storage”) studies on piping steels exposed to circulating supercritical impure CO2 have been carried out. For this purpose a loop consisting of compressors flow meter and two autoclaves was constructed. In order to simulate the real conditions in pipelines impurities such as H2O CO SO2 NO2 and O2 were added to the CO2 stream before compression. Exposure experiments were carried out with steel specimens placed in the autoclaves. C- Cr- CrNi- and CrNiMo-steels have been exposed to circulating supercritical impure CO2 for one week at 60 °C and 100 bar. Surface analysis and weight loss experiments in order to determine the corrosion products and the corrosion rates have been carried out. First results are presented and the materials for long time exposure tests are selected in order to perform an appropriate pipeline material ranking.
 

In order to reduce CO2 emission into the Earth’s atmosphere new technologies for CO2 separation from flue gas and its subsequent transportation and storage are currently under development and meet the interest of scientists and industry all over the world. However the corrosion effect of impure CO2 on pipeline steels needs to be investigated in more detail.

Within the project COORAL (German acronym for “CO2 purity for capture and storage”) studies on piping steels exposed to circulating supercritical impure CO2 have been carried out. For this purpose a loop consisting of compressors flow meter and two autoclaves was constructed. In order to simulate the real conditions in pipelines impurities such as H2O CO SO2 NO2 and O2 were added to the CO2 stream before compression. Exposure experiments were carried out with steel specimens placed in the autoclaves. C- Cr- CrNi- and CrNiMo-steels have been exposed to circulating supercritical impure CO2 for one week at 60 °C and 100 bar. Surface analysis and weight loss experiments in order to determine the corrosion products and the corrosion rates have been carried out. First results are presented and the materials for long time exposure tests are selected in order to perform an appropriate pipeline material ranking.
 

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