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Corrosion in aqueous solution of two alkanolamines with CO2 and H2S / Rafael Eustaquio-Rincon in Industrial & engineering chemistry research, Vol. 47 n°14 (Juillet 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°14 (Juillet 2008) . - p. 4726–4735 Titre : Corrosion in aqueous solution of two alkanolamines with CO2 and H2S : N-methyldiethanolamine + diethanolamine at 393 K Type de document : texte imprimé Auteurs : Rafael Eustaquio-Rincon, Auteur ; Maria Esther Rebolledo-Libreros, Auteur ; Arturo Trejo, Auteur ; René Molnar, Auteur Année de publication : 2008 Article en page(s) : p. 4726–4735 Note générale : Bibliogr. p. 4734-4735 Langues : Anglais (eng) Mots-clés : Metal  corrosion;  Carbon  steel;  Well-known  weight  loss  method Résumé : In this work we have used an apparatus constructed in our laboratory to systematically study the corrosion rate on metals and evaluate specialty chemical products for preventing metal corrosion in industrial plants. We performed experimental studies on the effect of specific variables on corrosion rates over carbon steel, such as pressure, concentration of alkanolamines in aqueous solution, and amount of acid gases (CO2 and H2S). The technique utilized to evaluate the corrosion rate is the well-known weight loss method. With the experimental apparatus and method developed in this work we have determined the corrosion rate of AISI 1010 carbon steel in aqueous solutions of known concentration of N-methyldiethanolamine (MDEA) and diethanolamine (DEA), individually, with and without acid gases, and in different alkanolamine blends with total alkanolamine mass fraction in the range 15−60%, with mass ratios of MDEA/DEA of 3.5/1 and 2/1, with the addition of different amounts of H2S and CO2 at a pressure range of 276−5861 kPa (40−850 psig). Corrosion rates over carbon steel were determined in the liquid phase and also in some runs in both liquid and vapor phases, at 393.15 K. In the studied systems the corrosion rate decreases when the concentration of the alkanolamine increases. It was also possible to establish the effect of the amount of CO2 and H2S, in an individual way as well as in a mixture, on the corrosion rate of the carbon steel. The results show that corrosion rate of the alkanolamine solutions is not affected by CO2 in the range 0−0.35 mol; however, the presence of H2S drastically increases the corrosion rate as the amount of H2S increases. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071557r [article] Corrosion in aqueous solution of two alkanolamines with CO2 and H2S : N-methyldiethanolamine + diethanolamine at 393 K [texte imprimé] / Rafael Eustaquio-Rincon, Auteur ; Maria Esther Rebolledo-Libreros, Auteur ; Arturo Trejo, Auteur ; René Molnar, Auteur . - 2008 . - p. 4726–4735. Bibliogr. p. 4734-4735 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°14 (Juillet 2008) . - p. 4726–4735 Mots-clés : Metal  corrosion;  Carbon  steel;  Well-known  weight  loss  method Résumé : In this work we have used an apparatus constructed in our laboratory to systematically study the corrosion rate on metals and evaluate specialty chemical products for preventing metal corrosion in industrial plants. We performed experimental studies on the effect of specific variables on corrosion rates over carbon steel, such as pressure, concentration of alkanolamines in aqueous solution, and amount of acid gases (CO2 and H2S). The technique utilized to evaluate the corrosion rate is the well-known weight loss method. With the experimental apparatus and method developed in this work we have determined the corrosion rate of AISI 1010 carbon steel in aqueous solutions of known concentration of N-methyldiethanolamine (MDEA) and diethanolamine (DEA), individually, with and without acid gases, and in different alkanolamine blends with total alkanolamine mass fraction in the range 15−60%, with mass ratios of MDEA/DEA of 3.5/1 and 2/1, with the addition of different amounts of H2S and CO2 at a pressure range of 276−5861 kPa (40−850 psig). Corrosion rates over carbon steel were determined in the liquid phase and also in some runs in both liquid and vapor phases, at 393.15 K. In the studied systems the corrosion rate decreases when the concentration of the alkanolamine increases. It was also possible to establish the effect of the amount of CO2 and H2S, in an individual way as well as in a mixture, on the corrosion rate of the carbon steel. The results show that corrosion rate of the alkanolamine solutions is not affected by CO2 in the range 0−0.35 mol; however, the presence of H2S drastically increases the corrosion rate as the amount of H2S increases. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071557r

Interfacial tension and density of water + branched hydrocarbon bnary systems in the range 303-343 K / Carlos Gilberto Aranda-Bravo in Industrial & engineering chemistry research, Vol. 48 N°3 (Février 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°3 (Février 2009) . - p. 1476–1483 Titre : Interfacial tension and density of water + branched hydrocarbon bnary systems in the range 303-343 K Type de document : texte imprimé Auteurs : Carlos Gilberto Aranda-Bravo, Auteur ; Ascención Romero-Martínez, Auteur ; Arturo Trejo, Auteur Année de publication : 2009 Article en page(s) : p. 1476–1483 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Interfacial  Tension  Thermophysical  Water  --  Density  Hydrocarbon Résumé : Experimental results for the liquid-liquid interfacial tension of water + branched hydrocarbon binary systems were obtained using the pendant drop method. The branched hydrocarbons included in this study were 2-methylpentane and 3-methylpentane as structural isomers of C6H14; 2,3-dimethylpentane as isomer of C7H16; and 2,2,4-trimethylpentane and 2,3,4-trimethylpentane as isomers of C8H18. The temperatures at which the experiments were carried out were 303.15, 313.15, 323.15, 333.15, and 343.15 K. Density values of both saturated liquid phases were also experimentally determined. An experimental apparatus for achieving the liquid−liquid equilibrium with online sampling and density measurement was developed. Density values obtained for both saturated liquid phases follow the expected behavior with temperature: they decrease with increasing temperature, whereas the effect of the structural isomerism on density was mainly observed on the results for the hydrocarbon-rich liquid phase. Also, the interfacial tension values decrease with increasing temperature for a given water + hydrocarbon binary system and as the size of the hydrocarbon increases. Estimated values for the interfacial tension of the systems with the different branched isomers were obtained using a method developed in previous work. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801101r [article] Interfacial tension and density of water + branched hydrocarbon bnary systems in the range 303-343 K [texte imprimé] / Carlos Gilberto Aranda-Bravo, Auteur ; Ascención Romero-Martínez, Auteur ; Arturo Trejo, Auteur . - 2009 . - p. 1476–1483. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°3 (Février 2009) . - p. 1476–1483 Mots-clés : Interfacial  Tension  Thermophysical  Water  --  Density  Hydrocarbon Résumé : Experimental results for the liquid-liquid interfacial tension of water + branched hydrocarbon binary systems were obtained using the pendant drop method. The branched hydrocarbons included in this study were 2-methylpentane and 3-methylpentane as structural isomers of C6H14; 2,3-dimethylpentane as isomer of C7H16; and 2,2,4-trimethylpentane and 2,3,4-trimethylpentane as isomers of C8H18. The temperatures at which the experiments were carried out were 303.15, 313.15, 323.15, 333.15, and 343.15 K. Density values of both saturated liquid phases were also experimentally determined. An experimental apparatus for achieving the liquid−liquid equilibrium with online sampling and density measurement was developed. Density values obtained for both saturated liquid phases follow the expected behavior with temperature: they decrease with increasing temperature, whereas the effect of the structural isomerism on density was mainly observed on the results for the hydrocarbon-rich liquid phase. Also, the interfacial tension values decrease with increasing temperature for a given water + hydrocarbon binary system and as the size of the hydrocarbon increases. Estimated values for the interfacial tension of the systems with the different branched isomers were obtained using a method developed in previous work. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801101r

Remediation of soils contaminated with total petroleum hydrocarbons and polycyclic aromatic hydrocarbons / Marco Antonio Ávila-Chávez in Industrial & engineering chemistry research, Vol. 49 N° 7 (Avril 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 7 (Avril 2010) . - pp. 3342–3348 Titre : Remediation of soils contaminated with total petroleum hydrocarbons and polycyclic aromatic hydrocarbons : extraction with supercritical ethane Type de document : texte imprimé Auteurs : Marco Antonio Ávila-Chávez, Auteur ; Arturo Trejo, Auteur Année de publication : 2010 Article en page(s) : pp. 3342–3348 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Soils  Contaminated  Remediation  Petroleum  Hydrocarbons  Polycyclic  Aromatic  Hydrocarbons  Supercritical  Ethane Résumé : In this work two natural certified soils were extracted with supercritical ethane. One sample was polluted with total petroleum hydrocarbons (THP−soil) and the second one with polycyclic aromatic hydrocarbons (PAH−soil). The extraction studies were carried out using a high-pressure experimental device constructed in our laboratory. The extraction conditions for the TPH−soil were 27.1 MPa and 308.15 K, whereas those for the PAH−soil were 23.7 MPa and 308.15 K. Four independent extractions were performed on each test soil varying the volume of solvent: 10, 20, 30, and 40 L. Infrared spectroscopy was used to quantify the hydrocarbons in the residues after supercritical extraction of the TPH−soil, whereas high-performance liquid chromatography was employed, with a photodiode array detector and a fluorescence detector, to analyze seven polycyclic aromatic hydrocarbons (PAHs) in the residues after supercritical extraction of the PAH−soil. The extraction results show that there is a reduction of hydrocarbons of 76% using 10 L of ethane while the reduction is 90% using 40 L of ethane for the TPH−soil sample. For the sample of PAH−soil there is a reduction greater than 80% for the concentration of six of the seven PAHs studied. Naphthalene behaves as a refractory compound; hence, it presents the lowest reduction in concentration. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901502c [article] Remediation of soils contaminated with total petroleum hydrocarbons and polycyclic aromatic hydrocarbons : extraction with supercritical ethane [texte imprimé] / Marco Antonio Ávila-Chávez, Auteur ; Arturo Trejo, Auteur . - 2010 . - pp. 3342–3348. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 7 (Avril 2010) . - pp. 3342–3348 Mots-clés : Soils  Contaminated  Remediation  Petroleum  Hydrocarbons  Polycyclic  Aromatic  Hydrocarbons  Supercritical  Ethane Résumé : In this work two natural certified soils were extracted with supercritical ethane. One sample was polluted with total petroleum hydrocarbons (THP−soil) and the second one with polycyclic aromatic hydrocarbons (PAH−soil). The extraction studies were carried out using a high-pressure experimental device constructed in our laboratory. The extraction conditions for the TPH−soil were 27.1 MPa and 308.15 K, whereas those for the PAH−soil were 23.7 MPa and 308.15 K. Four independent extractions were performed on each test soil varying the volume of solvent: 10, 20, 30, and 40 L. Infrared spectroscopy was used to quantify the hydrocarbons in the residues after supercritical extraction of the TPH−soil, whereas high-performance liquid chromatography was employed, with a photodiode array detector and a fluorescence detector, to analyze seven polycyclic aromatic hydrocarbons (PAHs) in the residues after supercritical extraction of the PAH−soil. The extraction results show that there is a reduction of hydrocarbons of 76% using 10 L of ethane while the reduction is 90% using 40 L of ethane for the TPH−soil sample. For the sample of PAH−soil there is a reduction greater than 80% for the concentration of six of the seven PAHs studied. Naphthalene behaves as a refractory compound; hence, it presents the lowest reduction in concentration. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901502c