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Acetic Acid - Astrophysics Data System

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Last Updated: 10 December 2022

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Effect of Formic and Acetic Acids on Corrosion of 410 Stainless Steel in Bio-Oils

Bio-oils' composition is variable both depending on the biomass source and the production method. Formic and acetic acids are two of the most common carboxylic acids present in fast-pyrolysis bio-oils, and they pose a danger to metal alloy corrosion. In the current research, we varied the amounts of carboxylic acids in a forest residue fast pyrolysis bio-oil to see their effects on corrosion of type 410 stainless steel. We exposed 410SS specimens in FR3 in short-term, mild temperature exposures to investigate the effects of formic and acetic acids on corrosion in bio-oils. With a baseline reduced total acid number value of 50. 1 mg of KOH per gram of bio-oil, the 410SS specimens were polished, weighed, and exposed to fast pyrolysis bio-oil. In a FR3 bio-oil at room temperature, electrochemical Impedance Spectroscopy was also used to investigate corrosion behavior of 410SS.

Source link: https://ui.adsabs.harvard.edu/abs/2022ECSMA2022..692S/abstract


Thermodynamic Modeling and Experimental Validation of Acetic Acid Attack on Hardened Cement Paste: Effect of Silica Fume

This paper aims to experimentally verify the thermodynamic modeling of cement pastes in the face of acetic acid attack. The 11% substitution of cement by silica fume resulted in a 60 or 70% reduction of Portlandite content in the hardened cement paste, resulting in a higher percentage of CSH phases, which has an effect on dissolution processes and a higher pH with elevated acid values.

Source link: https://ui.adsabs.harvard.edu/abs/2022Mate...15.8355B/abstract


Improved efficiency of polymer solar cells via utilizing Alcohol-Soluble Small Molecules N-(2-Carboxyethyl)iminodi acetic acid as cathode interfacial layer

N-iminodiacetic acid layers in various amounts were embedded on the photoactive layer PTB7-Th:PC 71 BM film and used as the cathode interface modification material for PSCs' traditional device assembly. The efficiency of the photovoltaic unit was found at 8. 86% at a C 7 H 11 NO 6 concentration of 1 mg mL -1, which was around 56% higher than the reference device's performance.

Source link: https://ui.adsabs.harvard.edu/abs/2022OptMa.13312981Z/abstract


Effect and Mechanism of Acetic Acid to Improve the Hydration Activity of Steel Slag

To a certain extent, acetic acid can dehydrate steel slag powder and improve its strength. Silica gel and calcium silicate hydrate gel were two of the key hydration products, and calcium silicate hydrate gel was the main hydration aid. With the increase in acetic acid content, the number of hydration products increased, and total porosity decreased. However, if the concentration was too high, more H+ reacted with the carbonate and iron in the steel slag, resulting in more CO 2 and H 2 creation and more air pores in the steel slag paste, while still producing more air pores in the steel slag paste.

Source link: https://ui.adsabs.harvard.edu/abs/2022JOM...tmp..561C/abstract


Adsorption kinetics of acetic acid into ZnO/castor oil-derived polyurethanes

Hybrid systems made of a castor oil-derived polymeric network and a disperse phase of zinc oxide particles may be more effective absorbers of acetic acid than state-of-the-art materials, provided that the hybrid's acid uptake mechanism is defined and optimized. The polymer matrix could act as a transporter, according to the starting case, although acid adsorption could take place at the ZnO particles surface. ZnO micro- and nano-particles in the hybrid networks' morphological and fractal dimensions were investigated and correlated to the adsorption kinetics. For the first time, the presence of a two-step mechanism for AcOH uptake by the hybrids was shown for the first time: in the COP matrix, a combination of Fickian diffusion and Case-II transport occurs, and adsorption dominates acid uptake at the particles surface, with Fickian diffusion and Case-II transport occurring in the Fickian diffusion and Case-II transport. Microparticles are smaller and ramified fractal clusters that are able to absorb AcOH more efficiently than microparticles.

Source link: https://ui.adsabs.harvard.edu/abs/2023JCIS..632A..74Z/abstract


Structural, spectroscopic and O-H⋯O hydrogen bonding interaction on monomer and dimer form of hydroxy phenoxy acetic acid derivatives by experimental and computational techniques

Experimental and theoretical IR, Raman, UV-Vis, and NMR methods demonstrated the chemical's cardiovascular activity by the presence of the compound's cardiovascular activity. The molecular descriptors generated by the DFT technique were used for the QSAR model and estimating HPAA's cytotoxicity.

Source link: https://ui.adsabs.harvard.edu/abs/2020JMoSt120427471B/abstract


Structural, spectroscopic and computational investigations on (4,6-dimethyl-benzofuran-3-yl)-acetic acid hydrazide

Through various spectroscopic techniques and quantum chemical computations, the present work investigates the atomic and spectroscopic characteristics of -acetic acid hydrazide. Using B3LYP from density functional with a 6-311++G basis set, quantum chemical calculations are performed with a high degree of theory. The numerically simulation and Raman wavenumbers are compared to experimental results to determine the structure corresponding to local minima and local maxima from the potential energy surface. Chemical shifts of 1H and 13 C NMR chemical shifts are investigated and then compared with computed NMR results.

Source link: https://ui.adsabs.harvard.edu/abs/2020JMoSt122028748K/abstract


Comparisons of I - and Cl - concentrations on the corrosion behavior of TA4 titanium alloy in azeotropic acetic acid solutions

The corrosion issues relating to corroding of TA4 titanium alloy trays were urgent to be addressed in the safe and efficient production process of the acetic acid distillation column. Electrochemical impedance spectroscopy and potentiodynamic polarization measurements were applied to a variety of I - and Cl - concentrations in simulated azeotropic acetic acid solutions with a series of I - and Cl - concentrations, according to the actual corrosion environment of the distillation column. Cl's inhibition of passive film formation on the surface of a TA4 titanium alloy by Cl - is higher than that of I -.

Source link: https://ui.adsabs.harvard.edu/abs/2022JPhCS2368a2009D/abstract

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions