کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
67848 48496 2008 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of peracetic acid from hydrogen peroxide, part II: Kinetics for spontaneous decomposition of peracetic acid in the liquid phase
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Preparation of peracetic acid from hydrogen peroxide, part II: Kinetics for spontaneous decomposition of peracetic acid in the liquid phase
چکیده انگلیسی

A homogeneous kinetic model was developed for describing the synthesis, hydrolysis and spontaneous decomposition of peracetic acid (PAA) in the liquid phase under an acid condition. It was found that the chelant (diethylenetriaminepenta acetic acid, DTPA) was not so effective for reduction of PAA decomposition in a strong acid solution as it in a neutral or alkaline aqueous solution. The expressions for calculating the rate constants of PAA synthesis and hydrolysis obtained in our previous work were still appropriate at a high temperature. The spontaneous decomposition of PAA under an acid condition was an observed second-order reaction with respect to PAA concentration. The observed rate constant was a relatively complicated function of temperature and H+ concentration. Addition of sulfuric acid could significantly decrease the PAA decomposition. The reaction mechanism was investigated. It was proved that the rate-determining step for the spontaneous decomposition of PAA was the reaction between PAA molecule and a proton-activated carbonyl intermediary. The application of the kinetic model was further discussed.

A homogeneous kinetic model with consideration of the synthesis, hydrolysis and spontaneous decomposition of peracetic acid (PAA) in the liquid phase under an acid condition was developed. The reaction mechanism was investigated. It was proved that the rate-determining step for the spontaneous decomposition of PAA was the reaction between PAA molecule and a proton-activated carbonyl intermediary. Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Catalysis A: Chemical - Volume 284, Issues 1–2, 2 April 2008, Pages 58–68
نویسندگان
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