Catalytic decomposition of aliphatic peroxy acids

Dutka, V. S.; Zagorskaya, V. V.; Dutka, Yu. V.

doi:10.1134/s0023158410030067

Cited by 9 publications

(4 citation statements)

References 2 publications

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“…Lastly, solvent plays an important role in the PO hydrolysis. ,, Water can dramatically accelerate the decomposition of α-HAHPs and α-AAHPs. A nonlinear dependence was observed between the hydrolysis rate of α-HAHPs and solvent water content, which was attributed to the availability of water molecules in the water–organic solvent cluster.…”

Section: Multiphase Chemical Transformation Of Pos In the Atmospherementioning

confidence: 99%

Organic Peroxides in Aerosol: Key Reactive Intermediates for Multiphase Processes in the Atmosphere

et al. 2023

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Organic peroxides (POs) are organic molecules with one or more peroxide (−O−O−) functional groups. POs are commonly regarded as chemically labile termination products from gas-phase radical chemistry and therefore serve as temporary reservoirs for oxidative radicals (HO x and RO x ) in the atmosphere. Owing to their ubiquity, active gasparticle partitioning behavior, and reactivity, POs are key reactive intermediates in atmospheric multiphase processes determining the life cycle (formation, growth, and aging), climate, and health impacts of aerosol. However, there remain substantial gaps in the origin, molecular diversity, and fate of POs due to their complex nature and dynamic behavior. Here, we summarize the current understanding on atmospheric POs, with a focus on their identification and quantification, state-of-the-art analytical developments, molecular-level formation mechanisms, multiphase chemical transformation pathways, as well as environmental and health impacts. We find that interactions with SO 2 and transition metal ions are generally the fast PO transformation pathways in atmospheric liquid water, with lifetimes estimated to be minutes to hours, while hydrolysis is particularly important for α-substituted hydroperoxides. Meanwhile, photolysis and thermolysis are likely minor sinks for POs. These multiphase PO transformation pathways are distinctly different from their gas-phase fates, such as photolysis and reaction with OH radicals, which highlights the need to understand the multiphase partitioning of POs. By summarizing the current advances and remaining challenges for the investigation of POs, we propose future research priorities regarding their origin, fate, and impacts in the atmosphere.

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Section: Multiphase Chemical Transformation Of Pos In the Atmospherementioning

confidence: 99%

Organic Peroxides in Aerosol: Key Reactive Intermediates for Multiphase Processes in the Atmosphere

et al. 2023

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“…A decrease in activation energy E a indicates that heterogeneous catalytic decomposition of peroxides on the surface has a redox character. In systems containing Fe 2 O 3 and V 2 O 5 , the decomposition yields free radicals similarly to the known homogeneous and heterogeneous systems [19][20][21]. When studying the thermal decomposition of peroxides in the presence of V 2 O 5 , we observed a change in the color of the dispersed oxide, which sug gested a change in the oxidation state of vanadium ions.…”

Section: Resultsmentioning

confidence: 57%

Adsorption and decomposition of diacylic peroxides on the surfaces of dispersed oxides

Dutka

Koval’skii²,

Dutka

2013

Colloid J

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The adsorption of oligo(sebacoyl peroxide) on Aerosil and MgO and benzoyl peroxide on Fe 2 O 3 , Cr 2 O 3 , and V 2 O 5 has been studied. It has been established that peroxide adsorption on the considered adsor bents is described by the Langmuir equation. Benzoyl peroxide adsorption increases in the series Fe 2 O 3 < Cr 2 O 3 < V 2 O 5 . The process of thermal decomposition of peroxides in the presence of the listed adsorbents has been studied. The overall reaction of peroxide decomposition comprises two components, i.e., the decompo sition processes occurring in a solution and on an adsorbent surface. Kinetic and activation parameters of the thermal decomposition reactions in the solutions and on the surfaces have been determined.

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“…Через певні проміжки часу з реактора відбирали проби, аналізуючи їх на вміст непрореагованої ПК йодометрично [10] Каталітична активність іонів нікелю та заліза невелика. Як відомо [17], реакція каталітичного розкладу ПК за наявності іонів металу змінного ступеня окиснення охоплює дві стадії: на першій стадії швидко формується проміжна сполука каталізатор  ПК, яка, розкладаючись на другому етапі, дає продукти реакції. Як на першу, так і на другу стадію органічний розчинник впливає.…”

Section: матеріали та методика експериментуunclassified