scholarly journals On the p(x) approximation in the non-isothermal reaction kinetics by a generalized exponential integral the concept

2021 ◽  
Vol 25 (Spec. issue 2) ◽  
pp. 321-326
Author(s):  
Jordan Hristov ◽  
Veronika Karadjova
Keyword(s):  
Reaction Kinetics ◽  
Basic Concept ◽  
Exponential Integral ◽  
Arrhenius Model ◽  
Isothermal Reaction ◽  
Model Based

A non-Arrhenius model based on the Mittag-Leffler function has been conceived as a basic concept. This approach allows modelling both sub-Arrhenius and super-Arrhenius behaviours and giving rise to modified temperature integrals.

Isothermal Reaction Kinetics of Kraft Delignification of Douglas-Fir

1990 ◽  
Vol 10 (3) ◽  
pp. 293-310 ◽  
Author(s):  
Vincent L. Chiang ◽  
Jun Yu ◽  
Robert C. Eckert
Keyword(s):  
Reaction Kinetics ◽  
Douglas Fir ◽  
Isothermal Reaction ◽  
Kinetics Of

REACTION KINETICS OF HEXAMETHYLENE DIISOCYANATE AND POLYPROPYLENE GLYCOLS

2014 ◽  
Vol 87 (4) ◽  
pp. 617-628
Author(s):  
Min-Tzung Ye ◽  
Shinn-Gwo Hong
Keyword(s):  
Reaction Kinetics ◽  
Frequency Factor ◽  
Mechanical Analysis ◽  
Hexamethylene Diisocyanate ◽  
Empirical Equations ◽  
Ozawa Method ◽  
Scanning Calorimetry ◽  
Isothermal Reaction ◽  
Molecular Weights ◽  
Kinetics Of

ABSTRACT The kinetics of the reaction between hexamethylene diisocyanate (HDI) and polypropylene glycols (PPG) of different molecular weights toward the synthesis of polyurethanes with versatile properties was studied using differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). From the dynamic exotherms observed in DSC, it was found that the Kissinger equation modified by an additional temperature term in its frequency factor term was able to accurately describe the isothermal reaction kinetics of all HDI/PPG reactions. The modification can be justified by analyses with the Ozawa method and the modulus observed under DMA measurements. Regardless of the type of PPG used, the frequency factors changed with respect to the degree of conversion and maximized at near 70% conversion. The derivation of the modified kinetic equation is presented. In addition, the empirical equations describing the dependence of the activation energies and frequency factors on the molecular weights of PPG were also derived.

Analysis of non-isothermal reaction kinetics

1992 ◽  
Vol 203 ◽  
pp. 93-110 ◽  
Author(s):  
Ravindra K. Agrawal
Keyword(s):  
Reaction Kinetics ◽  
Isothermal Reaction

scholarly journals PENGEMBANGAN MANUSIA INDONESIA SEUTUHNYA BERDASARKAN MODEL KAMPUS “REHUH” (RELIGIUS, HUMANIS, HARMONIS)

Curricula ◽  
2019 ◽  
Vol 4 (2) ◽  
pp. 84
Author(s):  
Yusutria Yusutria ◽  
Rina Febriana
Keyword(s):  
Human Development ◽  
Basic Concept ◽  
Research Method ◽  
Campus Culture ◽  
Model Based ◽  
Library Research ◽  
Good Manner

<p align="center"><em>Education in Indonesia cannot be separated from the ideals of humanity and justice for all nations, as well as the realization of godly national intelligence, therefore a concept is needed to develop Indonesian people as a whole based on "REHUH" which is a religious, humane and harmonious campus. The research method is library research by analyzing descriptive. Indonesian human development is entirely based on the "REHUH" campus model, based on religion, intellectual, emotional, moral and psychological.</em></p><p><em>The basic concept is with; (1) inviting; (2) provide guidance and lessons; (3) conduct deliberations in a good manner; (4) asking God for guidance. Human development is based on; (1), Support the development of a humanistic culture in developing HR that is creative, innovative and friendly. (2). Instill religious and moral campus culture. (3). The lecturer is a minimum S-2, and has four main competencies, professional, pedagogic, personal and social</em></p><p align="center"> </p>

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