کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9693959 | 1459635 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Study of the dichromate-catalysed hydrogen peroxide decomposition: Comparison of different batch mode reactors for the kinetics determination
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Study of the dichromate-catalysed hydrogen peroxide decomposition: Comparison of different batch mode reactors for the kinetics determination Study of the dichromate-catalysed hydrogen peroxide decomposition: Comparison of different batch mode reactors for the kinetics determination](/preview/png/9693959.png)
چکیده انگلیسی
This paper deals with an experimental batch mode study of a chemical homogeneous reaction: the dichromate-catalysed hydrogen peroxide decomposition. The thermodynamic properties and the kinetic parameters of the reaction are simultaneously determined using a calorimetric approach. Various batch-operating modes (adiabatic, isoperibolic, or differential thermal analysis) are compared and it is shown that the determined parameters do not depend on the operating mode. A complete kinetic law is proposed. The reaction rate constant is assumed to follow the Arrhenius rate law. The Arrhenius parameters are determined as frequency factor k0Â =Â 1.39Â ÃÂ 109Â sâ1 and activation energy EÂ =Â 54.9Â kJÂ molâ1. The measured enthalpy of reaction is ÎrHÂ =Â â94Â kJÂ molâ1. The reaction order is between 0 and 2 in hydrogen peroxide according to operating conditions and depends linearly on the initial dichromate concentration. The reaction can be managed by two parameters: on one hand the released reaction heat directly depends on the hydrogen peroxide concentration, and on the other hand, the kinetic rate can be increased in increasing the dichromate concentration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 437, Issues 1â2, 15 October 2005, Pages 48-58
Journal: Thermochimica Acta - Volume 437, Issues 1â2, 15 October 2005, Pages 48-58
نویسندگان
Nader Frikha, Eric Schaer, Jean-Léon Houzelot,