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Kinetic Treatments for Catalyst Activation and Deactivation Processes based on Variable Time Normalization Analysis.

Alicia Martínez-Carrión^1,2, Michael G Howlett¹, Carla Alamillo-Ferrer¹

¹The University of Manchester, School of Chemistry, Oxford Road, Manchester, M13 9PL, UK.

Angewandte Chemie (International Ed. in English)

|May 1, 2019

Summary

This summary is machine-generated.

This study introduces two kinetic analysis methods to accurately interpret reaction profiles complicated by catalyst activation and deactivation. These novel treatments simplify complex kinetics, preventing erroneous conclusions in catalysis research.

Keywords:

catalyst activation catalyst deactivation concentration reaction profiles kinetics variable time normalization analysis

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Area of Science:

Chemical kinetics
Catalysis science
Reaction engineering

Background:

Reaction progress profiles are often influenced by concurrent catalyst activation and deactivation.
These side processes complicate kinetic analysis, potentially leading to inaccurate conclusions.
Accurate kinetic interpretation is crucial for understanding and optimizing chemical reactions.

Purpose of the Study:

To present two novel kinetic treatments for analyzing reactions with simultaneous catalyst activation and deactivation.
To provide methods for simplifying complex kinetic data affected by catalyst state changes.
To enable more reliable kinetic analysis in heterogeneous and homogeneous catalysis.

Main Methods:

Application of two kinetic treatments based on variable time normalization analysis.
Method 1: Removal of induction periods or deactivation effects when active catalyst quantity is measurable.
Method 2: Estimation of catalyst activation/deactivation profiles when reactant orders are known.

Main Results:

The first kinetic treatment effectively removes artifacts from catalyst deactivation, clarifying the true reaction profile.
The second treatment enables the quantitative assessment of catalyst activation or deactivation dynamics.
Both methods significantly improve the accuracy of kinetic analysis in complex catalytic systems.

Conclusions:

The developed kinetic treatments provide robust tools for dissecting complex reaction kinetics.
These methods address the challenge of catalyst deactivation and activation in kinetic studies.
Accurate kinetic analysis is achievable even in the presence of dynamic catalyst changes, advancing catalysis research.