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Methanesulfonic Acid - Crossref

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Last Updated: 23 April 2022

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Simplified mechanism for new particle formation from methanesulfonic acid, amines, and water via experiments and ab initio calculations

Airborne particles influence human health and greatly influence visibility and climate. However, accurately forecasting new particle formation in both laboratory tubes and in air has been difficult. Both of organosulfur acid and sulfuric acid are present in particles in coastal regions as well as inland during the oxidation of organosulfur compounds. Amines develop particles on reaction with methanesulfonic acid, water vapor is required, and particle assembly can be quantitatively replicated by a semiempirical kinetics model backed by quantum chemical analyses of likely intermediate clusters.

Source link: https://doi.org/10.1073/pnas.1211878109


Microscopic Insights Into the Formation of Methanesulfonic Acid–Methylamine–Ammonia Particles Under Acid-Rich Conditions

Understanding the microscopic mechanisms of new particle formation under acid-rich conditions is of utmost in atmospheric science. All bases are protonated, and they establish stable ion pairs with MSA, which aid in charge transfer and cluster stability. NPF can be synergistic under acid-rich environments, and NH3's role in NH3 becomes more prominent as cluster size rises.

Source link: https://doi.org/10.3389/fevo.2022.875585


Optimisation of Thiourea Concentration in a Decorative Copper Plating Acid Bath Based on Methanesulfonic Electrolyte

For copper deposition and application in the decorative electroplating and fashion accessory industries, the role of thiourea as an organic additive in the nucleation and growth mechanism was investigated. We investigated the nucleation and growth mechanism of copper using voltametric and chronoamperometric measurements with a brightener concentration ranging from 0 to 90 ppm. For the thickness determination of the copper deposits and the electrodeposition efficiencies correlated to thiourea concentration, X-ray fluorescence spectroscopy was used. Lastly, the optimal concentration of thiourea for the used formulation of copper plating was determined to be 60 ppm.

Source link: https://doi.org/10.3390/coatings12030376


The role of organic acids in new particle formation from methanesulfonic acid and methylamine

Methanesulfonic acid -driven new particle formation is expected to rise atmospheric organic acids. Initially, we investigated the OAs in ternary MA–MSA–OA cluster formation by considering the onset of the 111 clusters' free energies and their atmospheric concentrations of the OAs. Formic acid had the highest ability to stabilize the MA–MSA clusters, according to the authors. The second step is to expand the MSA–MA–ForA system to larger cluster sizes. ForA's findings reveal that Under atmospheric conditions, ForA can indeed raise MSA-MA NPF, raising MSA-MA NPF, indicating that ForA may play a key role in MSA-driven NPF.

Source link: https://doi.org/10.5194/acp-22-2639-2022


The Role of Organic Acids in New Particle Formation from Methanesulfonic Acid and Methylamine

Atmospheric organic acids are predicted to raise methanesulfonic acid -driven new particle formation. We started investigating the earliest possible OAs in ternary MA-MSA-OA cluster formation by considering the onset free energies of the 111 clusters and the atmospheric concentrations of the OAs. Formic acid has the highest ability to stabilize the MA-MSA clusters, according to it. ForA's results show that it can indeed improve MSA-MA NPF at atmospheric temperatures, indicating that ForA may play a vital role in MSA-driven NPF.

Source link: https://doi.org/10.5194/acp-2021-831


Isolation and characterization of methanesulfonic Acid-degrading bacteria from the marine environment

An inducible NADH-dependent monooxygenase, which converted methanesulfonic acid into formaldehyde and sulfite, initiated methanesulfonic acid metabolism in these strains. Cell suspensions of bacteria grown on methanesulfonic acid produced complete oxidized methanesulfonic acid to carbon dioxide and sulfite with a stoichiometry of 1. 0:2. 0. Although these strains grew on methanol and other one-carbon compounds, as well as a slew of heterotrophic carbon sources, it was discovered that methanol is not a precursor in methanesulfonic acid metabolism.

Source link: https://doi.org/10.1128/aem.61.6.2388-2393.1995


Effects of Thiourea and Allyl Thioura on the Electrodeposition and Microstructures of Copper from Methanesulfonic Acid Baths

From the polarization results obtained by the rotating ring disk electrode voltammograms and chronopotentiometric steady state electrode potential evaluations, TU and ATU demonstrate Cu deposition suppression capability, although ATU's interaction strength is weaker than that between Cu 2+ and TU. Both additives are of the same molecular structures and have demonstrated a suppression capability on Cu grains, with TU and ATU significantly different influences on Cu grain nucleation and growth leading to the production of very different surface morphologies and surface roughness of resultant Cu films.

Source link: https://doi.org/10.1149/1945-7111/abec56


Activation of methane: A selective industrial route to methanesulfonic acid

Methane oxidation on the plus side Industrial conversion of methane to alcohol derivatives begins with overoxidation to carbon monoxide. D'urush and Ott describe a reaction at a pilot-scale that incorporates methane and sulfur trioxide directly in sulfuric acid to produce methanesulfonic acid with no by-products.

Source link: https://doi.org/10.1126/science.aav0177


Molecular-level evidence for marine aerosol nucleation of iodic acid and methanesulfonic acid

Field experiments have established both iodic acid and methanesulfonic acid as important precursors of new particle formation in marine areas. Hence, we investigated the IA-MSA nucleation system under various atmospheric conditions and demonstrated the corresponding nucleation mechanism at a molecular level for the first time using quantum chemical approach and Atmospheric Cluster Dynamics Code. The IA-MSA nucleation device, in addition to self-nucleation of IA, can also participate in the nucleation process directly, and their role in the polar regions with abundant MSA and sparse IA is especially prominent in the polar regions with high MSA and sparse IA.

Source link: https://doi.org/10.5194/acp-2021-595


Refining of Precious Metal Bearing Materials from Secondary Sources-Methanesulfonic Acid Leaching of Raw Silver Granules as a Promising Approach towards a Green Way of Silver Refining

Both from a technological and an ecological perspective, the state-of-the-art method of raw silver refining in a silver nitrate-based electrorefining process is accompanied by numerous drawbacks. In addition, rising amounts of essential impurities from secondary sources, such as palladium, in raw silver, pose a new threat to silver refining's future. Methanesulfonic acid, a potential base chemical for the development of a cost-effective refining process based on leaching of raw silver and electrowinning, with reduced environmental and technological challenges. Agitation leaching experiments were carried out on a laboratory scale, and the effects of the solid concentration, the hydrogen peroxide dosage, and the temperature were determined as leaching parameters were investigated.

Source link: https://doi.org/10.3390/ma14206095

* 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