Engine corrosion has been a long prevalent problem which is further aggravated by acids produced during combustion of fuels. Sulphur containing fuels produce sulphuric acid which must be neutralized in order to prevent corrosion at the engine cylinder lining and piston rings. In order to prevent this corrosion, lubrication oil used in combustion engines contains basic additives like CaCO3-based reverse micelles for neutralizing the acid produced. The mechanism and rate limiting step in the reaction between acid droplets and basic reverse micelles has long been a subject of study. Literature on sulpluric acid droplets neutralization speculates that diffusion of micelles towards the acid droplet is the rate limiting step. However, through this research, we have proved that a diffusion-controlled mechanism alone is not applicable. This has been done by studying various capillary video microscopy experiments on sulphuric, nitric and acetic acid. To prove the invalidity of a diffusion-controlled mechanism, we have assessed the diffusion coefficient and the viscosity at different temperature. Models for finding the diffusion coefficient & viscosity are based on Fick’s law and Stokes Einstein equation respectively. The obtained viscosity from assuming a diffusion-controlled model is compared to observed viscosity (actual viscosity) in lubricant oil to measure deviation of diffusion-controlled model from actual neutralization kinetics. Finally, we have hypothesized alternative reaction mechanisms to explain the considerable deviation found in viscosity values.
| Published in | American Journal of Chemical and Biochemical Engineering (Volume 5, Issue 2) |
| DOI | 10.11648/j.ajcbe.20210502.12 |
| Page(s) | 49-54 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2021. Published by Science Publishing Group |
Acid Droplet Neutralization, Diffusion-Controlled Kinetics, Acid Droplet Neutralization, Lubricant Oil, Maritime Diesel Engines
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APA Style
Divit Gulati, Jayesh Jawandhia. (2021). Assessing Validity of Diffusion Controlled Model in Acid Neutralization of Lubricant Oil. American Journal of Chemical and Biochemical Engineering, 5(2), 49-54. https://doi.org/10.11648/j.ajcbe.20210502.12
ACS Style
Divit Gulati; Jayesh Jawandhia. Assessing Validity of Diffusion Controlled Model in Acid Neutralization of Lubricant Oil. Am. J. Chem. Biochem. Eng. 2021, 5(2), 49-54. doi: 10.11648/j.ajcbe.20210502.12
AMA Style
Divit Gulati, Jayesh Jawandhia. Assessing Validity of Diffusion Controlled Model in Acid Neutralization of Lubricant Oil. Am J Chem Biochem Eng. 2021;5(2):49-54. doi: 10.11648/j.ajcbe.20210502.12
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Download@article{10.11648/j.ajcbe.20210502.12,
author = {Divit Gulati and Jayesh Jawandhia},
title = {Assessing Validity of Diffusion Controlled Model in Acid Neutralization of Lubricant Oil},
journal = {American Journal of Chemical and Biochemical Engineering},
volume = {5},
number = {2},
pages = {49-54},
doi = {10.11648/j.ajcbe.20210502.12},
url = {https://doi.org/10.11648/j.ajcbe.20210502.12},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajcbe.20210502.12},
abstract = {Engine corrosion has been a long prevalent problem which is further aggravated by acids produced during combustion of fuels. Sulphur containing fuels produce sulphuric acid which must be neutralized in order to prevent corrosion at the engine cylinder lining and piston rings. In order to prevent this corrosion, lubrication oil used in combustion engines contains basic additives like CaCO3-based reverse micelles for neutralizing the acid produced. The mechanism and rate limiting step in the reaction between acid droplets and basic reverse micelles has long been a subject of study. Literature on sulpluric acid droplets neutralization speculates that diffusion of micelles towards the acid droplet is the rate limiting step. However, through this research, we have proved that a diffusion-controlled mechanism alone is not applicable. This has been done by studying various capillary video microscopy experiments on sulphuric, nitric and acetic acid. To prove the invalidity of a diffusion-controlled mechanism, we have assessed the diffusion coefficient and the viscosity at different temperature. Models for finding the diffusion coefficient & viscosity are based on Fick’s law and Stokes Einstein equation respectively. The obtained viscosity from assuming a diffusion-controlled model is compared to observed viscosity (actual viscosity) in lubricant oil to measure deviation of diffusion-controlled model from actual neutralization kinetics. Finally, we have hypothesized alternative reaction mechanisms to explain the considerable deviation found in viscosity values.},
year = {2021}
}
TY - JOUR T1 - Assessing Validity of Diffusion Controlled Model in Acid Neutralization of Lubricant Oil AU - Divit Gulati AU - Jayesh Jawandhia Y1 - 2021/10/12 PY - 2021 N1 - https://doi.org/10.11648/j.ajcbe.20210502.12 DO - 10.11648/j.ajcbe.20210502.12 T2 - American Journal of Chemical and Biochemical Engineering JF - American Journal of Chemical and Biochemical Engineering JO - American Journal of Chemical and Biochemical Engineering SP - 49 EP - 54 PB - Science Publishing Group SN - 2639-9989 UR - https://doi.org/10.11648/j.ajcbe.20210502.12 AB - Engine corrosion has been a long prevalent problem which is further aggravated by acids produced during combustion of fuels. Sulphur containing fuels produce sulphuric acid which must be neutralized in order to prevent corrosion at the engine cylinder lining and piston rings. In order to prevent this corrosion, lubrication oil used in combustion engines contains basic additives like CaCO3-based reverse micelles for neutralizing the acid produced. The mechanism and rate limiting step in the reaction between acid droplets and basic reverse micelles has long been a subject of study. Literature on sulpluric acid droplets neutralization speculates that diffusion of micelles towards the acid droplet is the rate limiting step. However, through this research, we have proved that a diffusion-controlled mechanism alone is not applicable. This has been done by studying various capillary video microscopy experiments on sulphuric, nitric and acetic acid. To prove the invalidity of a diffusion-controlled mechanism, we have assessed the diffusion coefficient and the viscosity at different temperature. Models for finding the diffusion coefficient & viscosity are based on Fick’s law and Stokes Einstein equation respectively. The obtained viscosity from assuming a diffusion-controlled model is compared to observed viscosity (actual viscosity) in lubricant oil to measure deviation of diffusion-controlled model from actual neutralization kinetics. Finally, we have hypothesized alternative reaction mechanisms to explain the considerable deviation found in viscosity values. VL - 5 IS - 2 ER -
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