Synergistic effect of O2, H2S and SO2 impurities on the corrosion behavior of X65 steel in water-saturated supercritical CO2 system

Sun, Chi‐Lu; Sun, Jianbo; Wang, Yong; Lin, Xufeng; Li, Xueda; Cheng, Xiangkun; Liu, Huifeng

doi:10.1016/j.corsci.2016.02.032

Cited by 97 publications

(46 citation statements)

References 27 publications

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“…However, studies related to the corrosion in CO 2 -containing environment where O 2 and H 2 S exist simultaneously are still limited [10,14,15,16]. To our best knowledge, the coupling effect of O 2 and H 2 S in the simulated flue gas injection environment has been rarely reported.…”

Section: Introductionmentioning

confidence: 99%

The Coupling Effect of O2 and H2S on the Corrosion of G20 Steel in a Simulating Environment of Flue Gas Injection in the Xinjiang Oil Field

et al. 2018

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Flue gas injection for heavy oil recovery has received a great deal of attention, because it is more cost effective than lots of other injection methods. However, the corrosion could occur easily, because the flue gas usually contains corrosive gases such as CO2, H2S, and O2. In this work, the corrosion behaviors of G20 steel in flue gas injection environment simulating Xinjiang oil field (China) were investigated using weight loss measurement and surface characterization techniques. The effect of environments including the O2-containing environment, the H2S-containing environment, and the O2-H2S-coexisting environment on the corrosion of G20 steel in gas phase and liquid phase was discussed. The results show that the corrosion rate of G20 steel in the O2-H2S-coexisting environment is much higher than the sum of corrosion rates of the O2-containing environment and the H2S-containing environment, regardless of the gas phase and the liquid phase. This indicates that there is a coupling effect between O2 and H2S, which can further accelerate the corrosion of steel in O2-H2S-coexisting environment. The results of surface characterization demonstrate that in a typical flue gas injection environment, the corrosion products are composed of FeCO3, FeS, FeO(OH), and elemental sulfur. Elemental sulfur could obviously accelerate the corrosion of steel. Therefore, it can be considered that the coupling effect of O2 and H2S on corrosion of G20 steel in flue gas injection environment is caused by the formation of elemental sulfur in corrosion products.

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Section: Introductionmentioning

confidence: 99%

The Coupling Effect of O2 and H2S on the Corrosion of G20 Steel in a Simulating Environment of Flue Gas Injection in the Xinjiang Oil Field

et al. 2018

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“…In our prior work, we have reported the synergistic effect of O 2 , H 2 S and SO 2 impurities on the corrosion of X65 steel in water-saturated supercritical CO 2 system at 10 MPa and 50 • C [39]. Although the interactions among O 2 , H 2 S and SO 2 promoted the formation H 2 SO 4 and elemental sulfur, X65 steel still occurred uniform corrosion after being corroded for 120 h. Therefore, under test conditions, the localized corrosion should be closely related to the special corrosion phenomenon formed in water-saturated supercritical CO 2 system containing NO 2 : The spherical corrosion products could form which were similar to the shape of water droplets (Figs.…”

Section: Effect Of Sour Impurity On Corrosion Of X65 Steelmentioning

confidence: 99%

“…Many studies indicated that when O 2 , H 2 S or SO 2 are present in supercritical CO 2 system containing NO 2 , the interactions among these impurities can promote the formation of H 2 SO 4 and elemental sulfur [32,36,39]. The solubility of H 2 SO 4 in CO 2 is very low (high dew point) due to the hydrogen bonding [15,36].…”

Section: Effect Of Sour Impurity On Corrosion Of X65 Steelmentioning

confidence: 99%

Effect of impurity on the corrosion behavior of X65 steel in water-saturated supercritical CO2 system

Sun

Wang

Sun

et al. 2016

The Journal of Supercritical Fluids

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“…Water-saturated experiments in general report higher corrosion rates compared to dissolved water experiments. Sun et al performed several test series [21][22][23][24] with water-saturated conditions and multiple impurities. For CO 2 -H 2 O-SO 2 they reported 0.5 mm/y and the addition of O 2 increased the corrosion rate to 1.0 mm/y.…”

Section: Introductionmentioning

confidence: 99%

Effect of SO₂, O₂, NO₂, and H₂O Concentrations on Chemical Reactions and Corrosion of Carbon Steel in Dense Phase CO₂

Morland

Norby

Tjelta³

et al. 2019

CORROSION

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Carbon capture, utilization, and storage is expected to be an important method for reducing CO2emissions to prevent global warming. Several species (impurities) could follow the CO2through the capture plant as carry over. It is expected that nitrogen dioxide (NO2), sulfur dioxide (SO2), oxygen (O2), and water (H2O) can be present as impurities (concentrations at the ppmv level) in the captured CO2. The exact composition will depend on the flue gas type, the CO2capturing process, and multiple other parameters. Some of these impurities are reactive and may cause corrosion in carbon steel pipelines and could therefore be a threat for safe CO2transport. The present study used a novel experimental setup to realistically simulate a CO2transport pipeline system with a controlled and variable concentration of impurities at a total pressure of 10 MPa and a temperature of 25°C. The water concentration was increased and decreased with constant concentration of SO2and O2, to observe and identify possible reactions or threshold levels which could cause corrosion. A similar experiment was conducted with NO2. First, experiments were performed without steel coupons, to observe uncatalyzed reactions, and then with coupons to measure corrosion rates. The first sign of corrosion appeared at 350 ppmv of water with NO2present. At 670 ppmv water with 75 ppmv NO2the overall corrosion rate was about 0.57 mm/y and the main product was iron oxide. The corrosion process for SO2, O2, and water was much slower, and the first sign of corrosion appeared around 1,900 ppmv of water, with about 75 ppmv of SO2and 230 ppmv of O2. The corrosion rate increased some when the water concentration was increased to 2,400 ppmv, but the overall corrosion rate was only 3.6 μm/y and the main product on the surface was iron sulfate.

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Synergistic effect of O2, H2S and SO2 impurities on the corrosion behavior of X65 steel in water-saturated supercritical CO2 system

Cited by 97 publications

References 27 publications

The Coupling Effect of O2 and H2S on the Corrosion of G20 Steel in a Simulating Environment of Flue Gas Injection in the Xinjiang Oil Field

The Coupling Effect of O2 and H2S on the Corrosion of G20 Steel in a Simulating Environment of Flue Gas Injection in the Xinjiang Oil Field

Effect of impurity on the corrosion behavior of X65 steel in water-saturated supercritical CO2 system

Effect of SO₂, O₂, NO₂, and H₂O Concentrations on Chemical Reactions and Corrosion of Carbon Steel in Dense Phase CO₂

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Synergistic effect of O2, H2S and SO2 impurities on the corrosion behavior of X65 steel in water-saturated supercritical CO2 system

Cited by 97 publications

References 27 publications

The Coupling Effect of O2 and H2S on the Corrosion of G20 Steel in a Simulating Environment of Flue Gas Injection in the Xinjiang Oil Field

The Coupling Effect of O2 and H2S on the Corrosion of G20 Steel in a Simulating Environment of Flue Gas Injection in the Xinjiang Oil Field

Effect of impurity on the corrosion behavior of X65 steel in water-saturated supercritical CO2 system

Effect of SO2, O2, NO2, and H2O Concentrations on Chemical Reactions and Corrosion of Carbon Steel in Dense Phase CO2

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Effect of SO₂, O₂, NO₂, and H₂O Concentrations on Chemical Reactions and Corrosion of Carbon Steel in Dense Phase CO₂