scholarly journals THE DEVELOPMENT OF A UNIVERSAL CORROSION INHIBITOR

2021 ◽  
Vol 08 (04) ◽  
pp. 23-28
Author(s):  
Lala Haciyeva Lala Haciyeva ◽  
Mehin Baghirova Mehin Baghirova
Keyword(s):  
Fatty Acids ◽  
Hydrogen Sulfide ◽  
Practical Importance ◽  
Bactericidal Effect ◽  
Microbiological Analysis ◽  
Offshore Platforms ◽  
Condensation Products ◽  
Bactericidal Properties ◽  
Reducing Bacteria ◽  
Oilfield Equipment

In the article, in order to eliminate of the corrosion process, a universal bactericidal inhibitor was developed, based on the condensation products of aminoethylethanolamine and fatty acids. The bactericidal properties of the developed inhibitor were investigated. In wells operated on offshore platforms of O.G.E.O. on May 28, SOCSR carried out chemical and microbiological analysis of formation waters. The number of bactericidal cells of the investigated inhibitor and their vital activity indicate the bactericidal effect of its organizing advantage. The topic posed in this article is topical and has great theoretical and practical importance. An inhibiting composition has been developed, obtained on the basis of processing the residue of condensation products of aminoethylethanolamine and fatty acids, which have high inhibitory properties in model solutions. The optimal conditions for the synthesis of this inhibitor have been determined. The inhibiting properties of the composition of the new series, moreover, with a different composition in hydrogen sulfide media of oil fields of formation waters, imitating siphate-reducing bacteria, with respect to the bactericidal effect, have been established. Keywords: corrosion, oilfield equipment, inhibitor protection, aggressive protection, aggressive environment, hydrogen sulfide, carbon dioxide, oxygen, carbonate, dispersed particle.

scholarly journals APPLICATION OF NATURAL PETROLEUM ACIDS AS HEXAMETYLENDIAMIN COMPLEX COMBINES AS BACTERIA

2021 ◽  
Vol 10 (06) ◽  
pp. 58-63
Author(s):  
Teyyub İsmayılov, Sevinj Suleymanova Teyyub İsmayılov, Sevinj Suleymanova
Keyword(s):  
Room Temperature ◽  
Bactericidal Effect ◽  
Complex Compounds ◽  
Chemical Parameters ◽  
Sulfate Reducing ◽  
Bactericidal Properties ◽  
Physical And Chemical ◽  
Reducing Bacteria ◽  
Growth Of Bacteria ◽  
Petroleum Acid

Complex compounds were synthesized by mixing natural petroleum acids with hexamethylene diamine at a ratio of 1:1 and 2:1 at room temperature, IR spectra of the complexes were studied and confirmed, physical and chemical parameters were determined, solutions were prepared and bactericidal properties were studied. The bactericidal effect of a complex compound of natural petroleum acids synthesized with hexamethylenediamine in a ratio of 1: 1 mol at a concentration of 250 mg / l is 95%, a complex combination obtained at a concentration of 500 mg / l and 1000 mg / l is 100%, bactericidal at a concentration of 2: 1 mol at a concentration of 250 mg / l The effect was 98%, 100% at 500 and 1000 mg / l concentrations. According to the results, complex compounds of natural petroleum acids synthesized with hexamethylenediamine can be used to prevent the growth of bacteria. Keywords: natural petroleum acid, hexamethylenediamine, sulfate-reducing bacteria, complex compounds, bactericidal properties.

Bactericidal properties of a combined corrosion inhibitor in the presence of SRB

2020 ◽  
Vol 25 (3) ◽  
Keyword(s):  
Hydrogen Sulfide ◽  
Hydrogen Diffusion ◽  
Desulfovibrio Desulfuricans ◽  
Bacterial Cells ◽  
Bacteriostatic Effect ◽  
Sulfate Reducing ◽  
Bactericidal Properties ◽  
Number Of Microorganisms ◽  
Reducing Bacteria ◽  
Steel St3

The bactericidal properties of the combined inhibitor with respect to two types of Desulfovibrio desulfuricans and Desulfomicrobium sulfate-reducing bacteria were studied. The effect of the inhibitor on the number of bacterial cells and the formation of hydrogen sulfide in Postgate nutrient Postgate “B” was evaluated. It has been shown that the combined inhibitor exhibits a bacteriostatic effect on to sulphate-reducing bacteria. It was revealed that the degree of suppression of the number of microorganisms Desulfovibrio desulfuricans at a concentration of the combined inhibitor 100,0 mg/L is higher than Desulfomicrobium. In the latter case, to achieve this effect, 120,0 mg/L concentration of the combined inhibitor is required. The studied combination inhibitor causes the inhibition of hydrogen diffusion in steel St3 in the MI medium saturated with H2S and CO2 separately and together, and also contributes to preserving the ductile properties of the steel St3 after exposure to solutions compared to non-inhibited media.

Fluorescence chemosensors for hydrogen sulfide detection in biological systems

The Analyst ◽  
2015 ◽  
Vol 140 (6) ◽  
pp. 1772-1786 ◽  
Author(s):  
Zhi Guo ◽  
Guiqiu Chen ◽  
Guangming Zeng ◽  
Zhongwu Li ◽  
Anwei Chen ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Biological Systems ◽  
Sulfate Reducing Bacteria ◽  
Fluorescence Sensing ◽  
Sulfate Reducing ◽  
Potential Applications ◽  
Reducing Bacteria

The development of H2S fluorescence-sensing strategies and their potential applications in the determination of sulfate-reducing bacteria activity.

scholarly journals Formation of Thiophene under Simulated Volcanic Hydrothermal Conditions on Earth—Implications for Early Life on Extraterrestrial Planets?

Life ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 149
Author(s):  
Thomas Geisberger ◽  
Jessica Sobotta ◽  
Wolfgang Eisenreich ◽  
Claudia Huber
Keyword(s):  
Fatty Acids ◽  
Hydrogen Sulfide ◽  
Early Life ◽  
Organic Molecules ◽  
Metal Sulfides ◽  
Early Earth ◽  
Hydrothermal Conditions ◽  
Evolution Of Metabolism ◽  
Thiophene Derivatives ◽  
The Origin Of Life

Thiophene was detected on Mars during the Curiosity mission in 2018. The compound was even suggested as a biomarker due to its possible origin from diagenesis or pyrolysis of biological material. In the laboratory, thiophene can be synthesized at 400 °C by reacting acetylene and hydrogen sulfide on alumina. We here show that thiophene and thiophene derivatives are also formed abiotically from acetylene and transition metal sulfides such as NiS, CoS and FeS under simulated volcanic, hydrothermal conditions on Early Earth. Exactly the same conditions were reported earlier to have yielded a plethora of organic molecules including fatty acids and other components of extant metabolism. It is therefore tempting to suggest that thiophenes from abiotic formation could indicate sites and conditions well-suited for the evolution of metabolism and potentially for the origin-of-life on extraterrestrial planets.

scholarly journals Effect of abiotic factors on sulfidogenic activity of bacteria Desulfuromonas sp.

2020 ◽  
Vol 11 (2) ◽  
pp. 170-174
Author(s):  
O. M. Сhaіka ◽  
T. B. Peretyatko
Keyword(s):  
Hydrogen Sulfide ◽  
Cell Density ◽  
Elemental Sulfur ◽  
Abiotic Factors ◽  
Electron Acceptors ◽  
Stress Factors ◽  
Sulfide Concentration ◽  
Sulfur Concentration ◽  
Reducing Bacteria ◽  
Hydrogen Sulfide Concentration

Sulfur-reducing bacteria are promising agents for the development of new methods of wastewater treatment with the removal of ions of heavy metals and organic compounds. Study of the effect of various environmental factors on the growth and sulfidogenic activity of sulfur-reducing bacteria allows one to investigate the adaptability of these microorganisms to stress factors. The paper deals with the effect of рН, different concentrations of elemental sulfur, hydrogen sulfide and presence of various electron acceptors on the growth and sulfidogenic activity of bacteria Desulfuromonas sp. YSDS-3. The calculation of C/S ratio for sulfur-reducing bacteria Desulfuromonas sp. YSDS-3 was made, with the comparison with similar parameters of sulfate-reducing bacteria. In the medium with elemental sulfur, concentration of hydrogen sulfide increased with the concentration of elemental sulfur. Bacteria Desulfuromonas sp. YSDS-3 accumulated their biomass in the most effective way at the concentration of elemental sulfur of 10–100 mM. In the medium with polysulfide form of sulfur at the neutral pH, bacteria produced hydrogen sulfide and accumulated biomass the best. Hydrogen sulfide at the concentration of 3 mM did not inhibit the bacterial growth, but further increase in the hydrogen sulfide concentration inhibited the growth of bacteria. The bacteria did not grow at the hydrogen sulfide concentration of 25 mM and above. As the concentration of elemental sulfur and cell density increases, sulfidogenic activity of the bacteria grows. Presence of two electron acceptors (S and K2Cr2O7, S and MnO2, S and Fe (III)) did not affect the accumulation of biomass of the bacteria Desulfuromonas sp. YSDS-3. However, under such conditions the bacteria accumulated 1.5–2.5 times less hydrogen sulfide than in the test medium. After 12–24 h of cultivation, different concentrations of elemental sulfur had a significant effect on the sulfidogenic activity. However, during 3–16 days of cultivation, the percentage of effect of elemental sulfur concentration decreased to 31%, while the percentage of effect of cell density increased threefold. Presence in the medium of the electron acceptors (Cr (VI), MnO2, Fe (III)) alternative to elemental sulfur led to a significant decrease in the content of hydrogen sulfide produced by sulfur-reducing bacteria.

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