Evaluation of generic inhibitors behavior for multiphase systems (Steel-Brine-CO2/H2S) by using electrochemical techniques
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| Format: | Artículo científico |
| Language: | en |
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ECOPETROL S.A.
2007
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| _version_ | 1876486961668030464 |
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| author | Adriana Forero B. |
| author_facet | Adriana Forero B. |
| contents | Evaluation of generic inhibitors behavior for multiphase systems (Steel-Brine-CO2/H2S) by using electrochemical techniques Adriana Forero B. Darío-Yesid Peña B. Custodio Vásquez Q. Ingeniería amines sulfide acid carbon dioxide multiphase system corrosion inhibitor One of the main ways to inhibit the corrosion is the adsorption of organic compounds on the surfaceof a metal. This study reports the behavior of six different organic inhibitors in a system carbon steelAISI-SAE1020/brine 3%w of NaCl/ gas mixture of 6% volume of CO2/10 ppm of H2S/ hydrocarbon.Two primary amines with sixteen and eighteen atoms of carbon were used, a secondary amine with twentyatoms and three carboxylic acids of sixteen, eighteen and twenty carbon atoms.Linear polarization resistance measurements were used, along with Tafel extrapolation and electrochemicalimpedances to assess the influence of temperature, velocity of fluid, inhibitor concentration and concentrationof oleic phase on the inhibition efficiency in the Electrode of Rotational Cylinder, ECR.Activation and adsorption energies were calculated for the processes of corrosion in the system; accordingto the values derived, it was possible to define the system brine/CO2/H2S/ inhibitor, as a process with mixedcontrol, where the phenomenon of mass transfer and that of charge transfer are in competition and the valuesobtained for the energy of adsorption of Gibbs, allowed checking that these compounds showed a chemicaladsorption on the metallic surface. Under critical testing conditions (4 m/s, 59ºC or 332,15K) the aminespresent a better efficiency than carboxylic acids, thus complying with the electro-negativity theory applied toinhibitors. It was then possible to establish by the results obtained for the with hydrocarbon cuts tests, thatthis parameter adversely affects the percentage efficiency of the inhibitor. 2007 artículo científico 0122-5383 https://www.redalyc.org/articulo.oa?id=46530311 en http://www.redalyc.org/revista.oa?id=465 CT&F Ciencia, Tecnología y Futuro application/pdf ECOPETROL S.A. CT&F Ciencia, Tecnología y Futuro (Colombia) Num.3 Vol.3 |
| format | Artículo científico |
| id | redalyc_46530311 |
| institution | Redalyc |
| language | en |
| publishDate | 2007 |
| publisher | ECOPETROL S.A. |
| spellingShingle | Evaluation of generic inhibitors behavior for multiphase systems (Steel-Brine-CO2/H2S) by using electrochemical techniques Adriana Forero B. Ingeniería amines sulfide acid carbon dioxide multiphase system corrosion inhibitor Evaluation of generic inhibitors behavior for multiphase systems (Steel-Brine-CO2/H2S) by using electrochemical techniques Adriana Forero B. Darío-Yesid Peña B. Custodio Vásquez Q. Ingeniería amines sulfide acid carbon dioxide multiphase system corrosion inhibitor One of the main ways to inhibit the corrosion is the adsorption of organic compounds on the surfaceof a metal. This study reports the behavior of six different organic inhibitors in a system carbon steelAISI-SAE1020/brine 3%w of NaCl/ gas mixture of 6% volume of CO2/10 ppm of H2S/ hydrocarbon.Two primary amines with sixteen and eighteen atoms of carbon were used, a secondary amine with twentyatoms and three carboxylic acids of sixteen, eighteen and twenty carbon atoms.Linear polarization resistance measurements were used, along with Tafel extrapolation and electrochemicalimpedances to assess the influence of temperature, velocity of fluid, inhibitor concentration and concentrationof oleic phase on the inhibition efficiency in the Electrode of Rotational Cylinder, ECR.Activation and adsorption energies were calculated for the processes of corrosion in the system; accordingto the values derived, it was possible to define the system brine/CO2/H2S/ inhibitor, as a process with mixedcontrol, where the phenomenon of mass transfer and that of charge transfer are in competition and the valuesobtained for the energy of adsorption of Gibbs, allowed checking that these compounds showed a chemicaladsorption on the metallic surface. Under critical testing conditions (4 m/s, 59ºC or 332,15K) the aminespresent a better efficiency than carboxylic acids, thus complying with the electro-negativity theory applied toinhibitors. It was then possible to establish by the results obtained for the with hydrocarbon cuts tests, thatthis parameter adversely affects the percentage efficiency of the inhibitor. 2007 artículo científico 0122-5383 https://www.redalyc.org/articulo.oa?id=46530311 en http://www.redalyc.org/revista.oa?id=465 CT&F Ciencia, Tecnología y Futuro application/pdf ECOPETROL S.A. CT&F Ciencia, Tecnología y Futuro (Colombia) Num.3 Vol.3 |
| title | Evaluation of generic inhibitors behavior for multiphase systems (Steel-Brine-CO2/H2S) by using electrochemical techniques |
| topic | Ingeniería amines sulfide acid carbon dioxide multiphase system corrosion inhibitor |
| url | https://www.redalyc.org/articulo.oa?id=46530311 |