<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>The paper presents a new model of the mechanism of mechanocatalysis and tribocatalysis. The reason for the increase in heterogeneous catalysis effect after mechanical activation of a catalyst has not been fully understood yet. There is no known theory, which would explain the mechanism of the influence of mechanical energy introduced to catalyst particles on the rate of chemical reaction. All existing theories are based on Arrhenius equation and assume that catalysts increase reaction rate due to decreasing of activation energy E
                        a. We hypothesize that both for standard and catalyzed heterogeneous reactions the same E
                        a (real activation energy) is needed to trigger the reaction processes and the catalytic effect is the result of energy introduced to the reaction system, its accumulation by a catalyst and then emission of high flux of energy to the space near the catalyst particles. This energy emitted by molecules of reagents can reach a value equal to the value of E
                        a at lower ambient temperature than it would result from Arrhenius equation. This hypothesis is based on α
                        i model described in previous papers by Kajdas and Kulczycki as well as the results of tribochemical research described by Hong Liang et al., which demonstrate that the reaction rate is higher than that resulting from temperature.</p></abstract>

The paper presents a new model of the mechanism of mechanocatalysis and tribocatalysis. The reason for the increase in heterogeneous catalysis effect after mechanical activation of a catalyst has not been fully understood yet. There is no known theory, which would explain the mechanism of the influence of mechanical energy introduced to catalyst particles on the rate of chemical reaction. All existing theories are based on Arrhenius equation and assume that catalysts increase reaction rate due to decreasing of activation energy E
                        a. We hypothesize that both for standard and catalyzed heterogeneous reactions the same E
                        a (real activation energy) is needed to trigger the reaction processes and the catalytic effect is the result of energy introduced to the reaction system, its accumulation by a catalyst and then emission of high flux of energy to the space near the catalyst particles. This energy emitted by molecules of reagents can reach a value equal to the value of E
                        a at lower ambient temperature than it would result from Arrhenius equation. This hypothesis is based on α
                        i model described in previous papers by Kajdas and Kulczycki as well as the results of tribochemical research described by Hong Liang et al., which demonstrate that the reaction rate is higher than that resulting from temperature.

On the mechanism of catalysis induced by mechano-activation of solid body

Air Force Institute of Technology, Warsaw, Poland

Institute of Chemistry in Plock, Warsaw University of Technology, Warsaw, Poland

Department of Mechanical Engineering, Texas A&M University, College Station, USA

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"On the mechanism of catalysis induced by mechano-activation of solid body"}

The paper presents a new model of the mechanism of mechanocatalysis and tribocatalysis. The reason for the increase in heterogeneous catalysis effect after...

On the mechanism of catalysis induced by mechano-activation of solid body

Pubblicato online: 19 dic 2014

Pagine: 583 - 591

DOI: https://doi.org/10.2478/s13536-014-0228-7

Parole chiave
tribochemistry, activation energy, catalysis

© 2014 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

On the mechanism of catalysis induced by mechano-activation of solid body

Pubblicato online: 19 dic 2014

Pagine: 583 - 591

DOI: https://doi.org/10.2478/s13536-014-0228-7

Parole chiavetribochemistry, activation energy, catalysis

© 2014 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Parole chiave
tribochemistry, activation energy, catalysis