scholarly journals Prediction of the Biodegradation and Toxicity of Naphthenic Acids

10.5772/38431 ◽  
2012 ◽  
Author(s):  
Yana Koleva ◽  
Yordanka Tashev
Keyword(s):  
Naphthenic Acids

Catalytic Neutralization of Naphthenic Acid from Petroleum Crude Oil by Using Cerium Oxide Catalyst and 2- Methylimidazole in Polyethylene Glycol

2020 ◽  
Vol 13 ◽  
Author(s):  
Norshahidatul Akmar Mohd Shohaimi ◽  
Norfakhriah Jelani ◽  
Ahmad Zamani Ab Halim ◽  
Nor Hakimin Abdullah ◽  
Nurasmat Mohd Shukri
Keyword(s):  
Polyethylene Glycol ◽  
Crude Oil ◽  
Cerium Oxide ◽  
Active Sites ◽  
Naphthenic Acid ◽  
Naphthenic Acids ◽  
Catalyst Loading ◽  
High Concentration ◽  
Oil Refineries ◽  
Al2o3 Catalyst

: The presence of relatively high naphthenic acid in crude oil may contribute to the major corrosion in oil pipelines and distillation units in crude oil refineries. Thus, high concentration Naphthenic Acids crude oil is considered tobe of low quality and is marketed at lower prices. In order to overcome this problem, neutralization method had been developed to reduce the TAN value in crude oil. In this study, crude oil from Petronas Penapisan Melaka was investigated. The parameters studied were reagent concentration, catalyst loading, calcination temperature and reusability of the potential catalyst. Basic chemical used were 2- methylimidazole in polyethylene glycol (PEG 600) with concentration 100, 500 and 1000 ppm. Cerium oxide-based catalysts supported onto alumina prepared with different calcination temperatures. The catalyst was characterized by using Brunauer-Emmett-Teller (BET), Fourier Transform Infrared Spectroscopy (FTIR) and Thermogravimetry Analysis-Differential Thermal Gravity (TGA-DTG) to study physical properties of the catalyst. The Ce/Al2O3 catalyst calcined at 1000°C was the best catalyst due to larger surface area formation which lead to increment of active sites thus will boost the catalytic activity. The result showed that the Ce/Al2O3 catalyst meet Petronas requirement as the TAN value reduced to 0.6 mgKOH/g from original TAN value of 4.22 mgKOH/g. The best reduction of TAN was achieved by using catalyst loading of 0.39% and reagent of 1000 ppm.

scholarly journals Adamantane Carboxylic Acids Demonstrate Mitochondrial Toxicity Consistent with Oil Sands-Derived Naphthenic Acids

2021 ◽  
pp. 100092
Author(s):  
Kate I. Rundle ◽  
Mahmoud S. Sharaf ◽  
Don Stevens ◽  
Collins Kamunde ◽  
Michael R. Heuvel
Keyword(s):  
Carboxylic Acids ◽  
Oil Sands ◽  
Naphthenic Acids ◽  
Mitochondrial Toxicity

Predicting Sulfidic and Naphthenic Acid Corrosion

CORROSION ◽  
2009 ◽  
Vol 65 (12) ◽  
pp. 831-844 ◽  
Author(s):  
J. Hau
Keyword(s):  
Shear Stress ◽  
Exposure Time ◽  
Acid Corrosion ◽  
Naphthenic Acid ◽  
Naphthenic Acids ◽  
Sulfur Compounds ◽  
Velocity Shear ◽  
Threshold Behavior ◽  
Temperature Range ◽  
Si Content

Abstract This paper reviews the factors that are hindering the development of models to predict corrosion due to sulfur compounds, naphthenic acids, or both, acting simultaneously on steels within the temperature range typically from 230°C to 400°C. These factors are identified as data scattering that do not distribute normally, variables or factors that do not exert their influence in a gradual manner but as a threshold behavior, and the interactions between the factors of sulfidic and naphthenic acid corrosion; exposure time, temperature, and velocity (shear stress); and the chromium and molybdenum content of the steels (Si content is not discussed). Not dealing with the interactions is probably the largest obstacle, followed by data scattering.

Performance of ectomycorrhizal alders exposed to specific Canadian oil sands tailing stressors under in vivo bipartite symbiotic conditions

2016 ◽  
Vol 62 (7) ◽  
pp. 543-549 ◽  
Author(s):  
Martin Beaudoin-Nadeau ◽  
André Gagné ◽  
Cyntia Bissonnette ◽  
Pier-Anne Bélanger ◽  
J. André Fortin ◽  
...  
Keyword(s):  
Oil Sands ◽  
Seedling Survival ◽  
Naphthenic Acids ◽  
Paxillus Involutus ◽  
Alnus Incana ◽  
In Vivo Selection ◽  
Alnus Viridis ◽  
Leaf Necrosis ◽  
Different Strains

Canadian oil sands tailings are predominately sodic residues contaminated by hydrocarbons such as naphthenic acids. These conditions are harsh for plant development. In this study, we evaluated the effect of inoculating roots of Alnus viridis ssp. crispa and Alnus incana ssp. rugosa with ectomycorrhizal fungi in the presence of tailings compounds. Seedlings were inoculated with 7 different strains of Paxillus involutus and Alpova diplophloeus and were grown under different treatments of NaCl, Na2SO4, and naphthenic acids in a growth chamber. Afterwards, seedling survival, height, dry biomass, leaf necrosis, and root mycorrhization rate were measured. Paxillus involutus Mai was the most successful strain in enhancing alder survival, health, and growth. Seedlings inoculated with this strain displayed a 25% increase in survival rate, 2-fold greater biomass, and 2-fold less leaf necrosis compared with controls. Contrary to our expectations, A. diplophloeus was not as effective as P. involutus in improving seedling fitness, likely because it did not form ectomycorrhizae on roots of either alder species. High intraspecific variation characterized strains of P. involutus in their ability to stimulate alder height and growth and to minimize leaf necrosis. We conclude that in vivo selection under bipartite symbiotic conditions is essential to select effective strains that will be of use for the revegetation and reclamation of derelict lands.

Profiling naphthenic acids in produced water using hollow fiber liquid-phase microextraction combined with gas chromatography coupled to Fourier transform Orbitrap mass spectrometry

2021 ◽  
Vol 1655 ◽  
pp. 462485
Author(s):  
Nathália de Aguiar Porto ◽  
Juliana Crucello ◽  
Roselaine Facanali ◽  
Iris Medeiros Junior ◽  
Rogerio Mesquita Carvalho ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Fourier Transform ◽  
Liquid Phase ◽  
Hollow Fiber ◽  
Produced Water ◽  
Naphthenic Acids ◽  
Liquid Phase Microextraction ◽  
Orbitrap Mass Spectrometry

scholarly journals Direct mass spectrometric analysis of naphthenic acids and polycyclic aromatic hydrocarbons in waters impacted by diluted bitumen and conventional crude oil

2021 ◽  
Vol 765 ◽  
pp. 144206
Author(s):  
Joseph Monaghan ◽  
Larissa C. Richards ◽  
Gregory W. Vandergrift ◽  
Lindsay J. Hounjet ◽  
Stanislav R. Stoyanov ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Crude Oil ◽  
Aromatic Hydrocarbons ◽  
Naphthenic Acids ◽  
Mass Spectrometric ◽  
Mass Spectrometric Analysis ◽  
Spectrometric Analysis ◽  
Polycyclic Aromatic

Esterification of petroleum naphthenic acids with acetylenic alcohols

2009 ◽  
Vol 49 (3) ◽  
pp. 229-234 ◽  
Author(s):  
M. G. Veliev ◽  
O. A. Sadygov ◽  
N. A. Mamedova ◽  
S. A. Mustafaev
Keyword(s):  
Naphthenic Acids

Role of Naphthenic Acids in Stabilizing Water-in-Diluted Model Oil Emulsions

2010 ◽  
Vol 114 (23) ◽  
pp. 7710-7718 ◽  
Author(s):  
Song Gao ◽  
Kevin Moran ◽  
Zhenghe Xu ◽  
Jacob Masliyah
Keyword(s):  
Naphthenic Acids ◽  
Oil Emulsions ◽  
Model Oil

scholarly journals Floating Photocatalysts for Passive Solar Degradation of Naphthenic Acids in Oil Sands Process-Affected Water

Water ◽  
2018 ◽  
Vol 10 (2) ◽  
pp. 202 ◽  
Author(s):  
Tim Leshuk ◽  
Harish Krishnakumar ◽  
Diogo de Oliveira Livera ◽  
Frank Gu
Keyword(s):  
Oil Sands ◽  
Naphthenic Acids ◽  
Passive Solar
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