A coarse-graining approach for the proton complex in protonated aluminosilicates

Area of Science:

• Computational chemistry
• Materials science
• Adsorption science

Background:

• Protonated aluminosilicates (zeolites) are crucial industrial catalysts.
• Simulating alkane adsorption in these materials is complex due to hydrated protons.
• Fully atomistic simulations are computationally intensive and difficult.

Discussion:

• A coarse-graining computational framework was developed for alkane adsorption in protonated aluminosilicates.
• This model simplifies the complex hydrated proton environment.
• The approach is validated by MP2 quantum mechanical simulations.

Key Insights:

• The coarse-graining model accurately predicts experimental adsorption isotherms and Henry coefficients.
• Heats of adsorption and oxygen-proton distances are well-described by the model.
• The framework shows excellent agreement with experimental data beyond its calibration set.

Outlook:

• This simplified model offers a more accessible method for studying zeolite-framework interactions.
• Potential applications in optimizing industrial catalytic processes involving zeolites.
• Further development could extend the model to other complex zeolite systems.