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Updated: Jan 15, 2026

On-line Analysis of Nitrogen Containing Compounds in Complex Hydrocarbon Matrixes
Published on: August 5, 2016
A theoretical study of CH3SH pyrolysis kinetics.
Roméo Veillet1,2, Olivia Venot1, Fabiola Citrangolo Destro3
1Université Paris Cité and Univ Paris Est Creteil, CNRS, LISA, F-75013 Paris, France.
This study details the pyrolysis decomposition mechanism of methanethiol (CH3SH) using advanced electronic structure calculations. The findings accurately predict species abundance across various temperatures, crucial for understanding combustion and industrial processes.
Area of Science:
- Chemical Kinetics
- Theoretical Chemistry
- Combustion Science
Background:
- Methanethiol (CH3SH) decomposition is critical for understanding combustion and industrial sulfur chemistry.
- Accurate kinetic models are needed to predict species formation during pyrolysis.
Purpose of the Study:
- To elucidate the decomposition mechanism of methanethiol (CH3SH) under pyrolysis conditions.
- To develop a pressure-dependent kinetic model for methanethiol pyrolysis.
Main Methods:
- High-level electronic structure calculations (CCSD(T)-F12, CASPT2-F12).
- Master equation calculations to determine pressure-dependent reaction rates.
- Phase space theory to account for van der Waals complex formation.
Main Results:
- Detailed potential energy surfaces for key reaction pathways were mapped.
- Complex reaction dynamics with low energy barriers were identified for CH2S + SH addition.
- Calculated rates and mechanisms were validated against experimental data.
Conclusions:
- The developed mechanism robustly predicts the abundance of main species in methanethiol pyrolysis.
- The study provides a validated kinetic model for methanethiol decomposition.
- Understanding these mechanisms is vital for controlling sulfur emissions and optimizing industrial processes.
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