AMPP Store - Products tagged with 'supercritical co2'

Available for download

Effect Of H2S On The Performance Of Welded 13% Cr Steel In Supercritical CO2

Product Number: 51322-17886-SG

Author: Shiladitya Paul

Publication Date: 2022

$20.00

Carbon steels such as API 5L X65 are widely used oil and gas exploration, production and transportation service. However, these steels tend to corrode in the presence of wet CO2 and corrosion is more pronounced in the presence of dissolved salts and acids. Other metals, alloys and polymers also degrade in the presence of high pressure gaseous and supercritical CO2. The corrosion rate of carbon steels in some aqueous environments have been reported to be more than a few millimeters per year.9-10 The situation could be further exacerbated by H2S where cracking can be an issue for high strength steels.

Available for download

Effect of Operating Parameters on the Corrosion of Candidate Heat Exchanger Alloys in Advanced Thermal Power Plants

Product Number: 51324-21229-SG

Author: Minkang Liu; Yimin Zeng

Publication Date: 2024

$40.00

This study investigates the corrosion behavior of candidate steels with different Cr content in high-temperature s-CO2 environments and the influence of operating pressure. The results underscore the significant role of chromium, with content above 16 wt.% in the base metal proving effective in terms of conferring corrosion resistance. Moreover, the study reveals the substantial impact of operating pressure on weight gain, resulting in much thicker oxide layers. Further microscopic examinations may be required to gain deeper insights into oxide layer structure and composition. These findings advance our understanding of corrosion modes and extent within s-CO2 Brayton cycles.

Available for download

Enabling Carbon Steel With A Special scCO2 Corrosion Inhibitor – A Field Study

Product Number: 51322-18205-SG

Author: Tracey Jackson, Peng Jin, Jamie Wood, Johnathon Brooks

Publication Date: 2022

$20.00

In recent years the oil and gas industry has made significant commitments to carbon reduction.¹ Aligned with the goal of decreasing carbon emissions the authors have developed a corrosion inhibitor (CI-1) that is intended to protect scCO₂ systems that are wet or water contaminated (1000 ppm).² The development and composition of this corrosion inhibitor (CI) for dry scCO₂ is reported elsewhere.^2,3 While chemical companies have been treating high water cut, production enhanced, CO₂ floods (i.e. enhanced oil recovery [EOR]) for several decades there were no inhibitors designed specifically for CO₂ disposal systems or wet scCO₂ systems producing CO2 for sale.⁴

Available for download

Influence of High CO2 Partial Pressure on Top-of-the-Line Corrosion

Product Number: 51324-21220-SG

Author: Maryam Eslami; Bernardo Augusto Farah Santos; David Young; Sondre Gjertsen; Marc Singer

Publication Date: 2024

$40.00

Top-of-the-line corrosion (TLC) is an important type of material degradation that occurs due to the heat exchange between the pipeline and its surroundings, which results in water condensation on the internal surface of the pipe. This type of corrosion is specific to wet gas pipelines with stratified flow regimes. In this research, the effect of high CO2 partial pressure (pCO2) on TLC rate and mechanism was studied. The experiments were conducted in a high-pressure TLC autoclave with pCO2 ranging from 20 to 100 bar, solution temperatures of 30 and 50 °C, and different water condensation conditions (0.001-0.1 ml/m2.s). The experimental conditions covered environments where CO2 was either gaseous or supercritical. The results revealed that uniform and localized TLC rates increase with water condensation rate and solution temperature. However, as long as CO2 remained gaseous, pCO2 showed a negligible influence on both uniform and localized TLC rates. At a high CO2 content, the formation of a protective FeCO3 layer decreased the TLC rate, especially at lower water condensation rates. Nevertheless, the risk of localized corrosion at high and medium water condensation rates remained an issue. In the supercritical CO2 environment (pCO2 of 100 bar and solution temperature of 50 °C), the difference in temperature between the CO2 dense phase and the specimens caused water drop out and corrosion. In this environment, the high pCO2 and low pH of the dropped-out water led to high uniform and localized corrosion rates. However, under this condition, the difference in corrosion rates of specimens with different cooling rates was negligible due to their similar surface temperature.

Available for download

Investigating The Effect Of H2S And Corrosion Inhibitor On The Corrosion Of Mild Steel Under High Pressure CO2 Conditions

Product Number: 51322-17943-SG

Author: Yoon-Seok Choi, Fernando Farelas, Luciano Paolinelli, Ahmad Zaki B Abas, Azmi Mohammed Nor, Muhammad Firdaus Suhor

Publication Date: 2022

$20.00

Over the past decade, there has been increasing interest in the corrosion behavior of carbon steels in supercritical CO₂ conditions. Unlike the case of carbon capture and storage (CCS) where small amounts of water are present, the exploitation of fields with high pressures of CO₂ needs to consider the presence of formation water, which presents strong corrosivity. It has been reported that the aqueous corrosion rate of carbon steel at high CO₂ pressures (liquid and supercritical CO₂) without protective FeCO₃ corrosion product layers is very high (>20 mm/y) due to the high concentrations of corrosive species such as H⁺ and H₂CO_³.^1-5 Steels with low Cr contents (i.e., 1% Cr and 3% Cr) have shown no beneficial effect in terms of reducing the corrosion rate to admissible values.6 Therefore, controlling corrosion in these cases usually involves the use of corrosion resistant alloys (CRAs) or corrosion inhibitors (CI). Adequate protection of carbon steel was achieved by applying CI in high pressure CO₂ environments.⁶

Available for download

Performance of API 5L X65 in 138 MPa Supercritical CO2

Product Number: 51323-18863-SG

Author: Shiladitya Paul

Publication Date: 2023

$20.00

Carbon steels and low alloy steels are the workhorse of several industries where properties such as strength, fracture toughness and weldability play a key role. In addition to these properties, carbon steels are also the most cost effective materials is several applications. Of particular interest is the API 5L X65 which is widely used in oil and gas exploration, production and transportation service.

Available for download

Performance of Thermally Sprayed Aluminium in 10MPa Supercritical CO2

Product Number: 51324-21069-SG

Author: Shiladitya Paul; Catherine Leahy

Publication Date: 2024

$40.00

This paper reports the performance of thermally sprayed aluminium (TSA) in an aqueous solution pressurized with 10MPa supercritical CO2 at 40°C. Carbon steel specimen (BS EN 10025 S355) was coated with TSA and exposed to 3.5 wt.% NaCl solution pressurised with 10MPa CO2. The specimen was taken out after the 168h test and post-test examination was carried out. Post-test visual examination indicate no significant signs of damage which was confirmed by microstructural characterization. The SEM micrographs indicated promising behaviour of TSA with no corrosion was seen at the TSA-steel interface. However, one must note that the test was carried out for 168h and such short term test seldom give long-term corrosion performance. Nonetheless, the initial results looks interesting and provides some indication of TSA’s promise for protection of steel against CO2 corrosion.

Available for download

Performance of Thermally Sprayed Corrosion Resistant Alloy (CRA) Coatings in 50MPa Supercritical CO2

Product Number: 51317--9007-SG

ISBN: 9007 2017 CP

Author: Shiladitya Paul

Publication Date: 2017

$20.00

This paper reports the performance of HVOF-sprayed corrosion resistant alloy (CRA) coatings in an aqueous solution bubbled with 50MPa supercritical CO2.

Available for download

Predicting Corrosion Severity of Pipeline Steels in Supercritical CO2 Environments Using Supervised Machine Learning

Product Number: 51324-20803-SG

Author: Emily Seto; Meifeng Li; Jing Liu

Publication Date: 2024

$40.00

The importance of effective corrosion management in carbon capture, utilization, and storage (CCUS) networks has significantly increased. Captured CO2 is often transported in the supercritical state (s-CO2) and can contain impurities like H2O, O2, SOx, or NOx. While repurposing existing oil and gas pipelines for s-CO2 transport has been suggested, further testing and risk assessment is required to validate this strategy and its associated risks. Given the substantial amount of corrosion data available from recent corrosion studies, machine learning (ML) has emerged as a promising tool for corrosion prediction and management. This study aims to utilize supervised ML techniques to predict the corrosion severity of pipeline steels operating in s-CO2 systems. The selected algorithms, random forest (RF), K-nearest neighbor (KNN), and support vector machine (SVM) were trained on a comprehensive data set of X-series pipeline steels which includes corrosion rates, impurity levels, temperatures, pressures, and exposure times. Additional testing data set and error and accuracy scores were used to determine the most accurate algorithm. An additional experimental testing was performed to verify the predictions of the model. It was found that the RF model had the best accuracy of 65.3% out of the three tested models and KNN had the worst accuracy of 59.2%. In multiple impurity environments the RF model was able to accurately predict corrosion severity but overestimated corrosion severity in environments with short exposure times.

Products tagged with 'supercritical co2'

Association for Materials Protection and Performance