What question did this study set out to answer?

To investigate the impact of n-octadecylphosphonic acid (ODPA) coating on zeolite 5A for improved adsorptive separation of CO2 over C3H6.

February 8, 2026MoleculesOpen Access

Effect of n-Octadecylphosphonic Acid Coating on Zeolite 5A for Adsorptive Separation of Carbon Dioxide and Propylene

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Authors

MEMagdy Abdelghany ElsayedAl-Azhar University SZShixue ZhouShandong University of Science and Technology YLYao LiWannan Medical College

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Implication

This work demonstrates enhanced CO2/propylene selectivity in zeolite 5A through surface modification, indicating promising applications for efficient gas separation.

Key Points

To investigate the impact of n-octadecylphosphonic acid (ODPA) coating on zeolite 5A for improved adsorptive separation of CO2 over C3H6.
Modified zeolite 5A with varying ODPA concentrations
Measured CO2 and C3H6 adsorption capacities
Applied Sips isotherm model for data fitting
Conducted kinetic analysis for adsorption rates
Achieved CO2/C3H6 selectivity of 73 with 0.01 mol/L ODPA compared to 6.07 for pristine zeolite 5A
Calculated enthalpy changes of −30.70 kJ/mol for CO2 and −16.54 kJ/mol for C3H6
Found faster diffusion in pristine zeolite but enhanced selectivity with ODPA
Restoration of adsorption sites possible through tetrahydrofuran washing

Cite This Study

Elsayed et al. (2026) studied this question.

synapsesocial.com/papers/698828b90fc35cd7a8848801 https://doi.org/10.3390/molecules31030564

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Implication

This work demonstrates enhanced CO2/propylene selectivity in zeolite 5A through surface modification, indicating promising applications for efficient gas separation.

Effect of n-Octadecylphosphonic Acid Coating on Zeolite 5A for Adsorptive Separation of Carbon Dioxide and Propylene

Discussion

Member takes

Implication

Key Points

Cite This Study

Effect of n-Octadecylphosphonic Acid Coating on Zeolite 5A for Adsorptive Separation of Carbon Dioxide and Propylene

Discussion

Member takes

Implication

Key Points

Cite This Study

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