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Microkinetic Analysis and Scaling Relations for Catalyst Design.

Ali Hussain Motagamwala1, Madelyn R Ball1, James A Dumesic1

  • 1Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA; email: motagamwala@wisc.edu , mball2@wisc.edu , jdumesic@wisc.edu.

Annual Review of Chemical and Biomolecular Engineering
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Summary
This summary is machine-generated.

Microkinetic analysis aids catalyst design by revealing surface chemistry. This review details microkinetic models, scaling relationships, and methods to optimize catalyst performance and overcome limitations.

Keywords:
BEP correlationsBrønsted-Evans-Polanyi correlationscatalyst designmaximum rate analysismicrokinetic analysisreaction kinetics

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Area of Science:

  • Chemical Engineering
  • Surface Chemistry
  • Catalysis

Background:

  • Microkinetic analysis is crucial for understanding catalyst performance by elucidating fundamental surface chemistry.
  • Scaling relationships are increasingly incorporated into microkinetic models to predict catalyst behavior.

Purpose of the Study:

  • To review the development and application of microkinetic models in catalyst design.
  • To highlight methods for optimizing catalyst performance and overcoming scaling relation limitations.

Main Methods:

  • Summarizing the evolution of microkinetic modeling techniques.
  • Discussing stoichiometric and thermodynamic consistency in model development.
  • Analyzing maximum rates of elementary steps to identify kinetically significant species.

Main Results:

  • Microkinetic analysis allows prediction of optimal surface coverages and binding energies.
  • Rate expressions can be derived based on transition state and intermediate binding energies.
  • Limitations imposed by scaling relations can be identified.

Conclusions:

  • Microkinetic modeling provides a pathway to predict and enhance catalyst performance.
  • Strategies like adding promoters or multi-functional catalysts can break scaling relations for further rate improvement.
  • Understanding fundamental surface chemistry is key to designing superior catalysts.