Tuning Gas Adsorption Selectivity and Diffusion Rates in Zeolites with Phosphonic Acid Monolayers

Ellis, Lucas D.; Parker, Surya T.; Hu, Jeremy; Zaccarine, Sarah; Stellato, Michael J.; Funke, Hans H.; Sievers, Carsten; Pylypenko, Svitlana; Falconer, John L.; Medlin, J. Will

doi:10.1016/j.xcrp.2020.100036

Cited by 3 publications

(4 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another way that organic layers on oxides can potentially be important in catalysis is to achieve enhanced control over transport within porous structures. Recently, PAs were deposited onto molecular sieves such as zeolite 5A . Alkyl PAs were generally found to bind to the external surface of the zeolite, slowing transport of various gases into the zeolite crystals.…”

Section: Perspectives and Conclusionmentioning

confidence: 99%

“…More complex scenarios are also possible. For example, the short-chain methyl PA was found to penetrate the subsurface region of the 5A zeolite crystals, creating a structure that more dramatically influenced gas diffusion into the pores . Interestingly, the suppression of propane diffusion was much greater than that for propylene, resulting in high ideal selectivity for propylene adsorption and therefore propane/propylene separation.…”

Section: Perspectives and Conclusionmentioning

confidence: 99%

“…Recently, PAs were deposited onto molecular sieves such as zeolite 5A. 50 Alkyl PAs were generally found to bind to the external surface of the zeolite, slowing transport of various gases into the zeolite crystals. By manipulating the chemistry of the PA tail groups to preferentially attract or repel particular gases, it may be possible to selectively retard transport to the interior of the zeolite, providing a new basis for selectivity control.…”

Section: ■ Perspectives and Conclusionmentioning

confidence: 99%

“…For example, the shortchain methyl PA was found to penetrate the subsurface region of the 5A zeolite crystals, creating a structure that more dramatically influenced gas diffusion into the pores. 50 Interestingly, the suppression of propane diffusion was much greater than that for propylene, resulting in high ideal selectivity for propylene adsorption and therefore propane/ propylene separation. Thus, organic functionalization of the interior of porous oxide structures may provide a route for controlling access of reactants to active sites that goes beyond tradition pore size/shape control.…”

Section: ■ Perspectives and Conclusionmentioning

confidence: 99%

See 3 more Smart Citations

Controlling Heterogeneous Catalysis with Organic Monolayers on Metal Oxides

Jenkins

Medlin

2021

Acc. Chem. Res.

Self Cite

View full text Add to dashboard Cite

Section: Perspectives and Conclusionmentioning

confidence: 99%

Section: Perspectives and Conclusionmentioning

confidence: 99%

Section: ■ Perspectives and Conclusionmentioning

confidence: 99%

Section: ■ Perspectives and Conclusionmentioning

confidence: 99%

See 2 more Smart Citations

Controlling Heterogeneous Catalysis with Organic Monolayers on Metal Oxides

Jenkins

Medlin

2021

Acc. Chem. Res.

Self Cite

View full text Add to dashboard Cite

Mechanism of selectivity control for zeolites modified with organic monolayers

Zhou

Falconer

Medlin

2022

Microporous and Mesoporous Materials

View full text Add to dashboard Cite

Zeolites: A Theoretical and Practical Approach with Uses in (Bio)Chemical Processes

et al. 2023

View full text Add to dashboard Cite

This review provides a state-of-the-art summary of distributed zeolite technology, as well as identifying strategies to further promote the absorption of these materials in various areas of study. Zeolites are materials that can be synthesized or found in natural rock deposits a with a basic composition consisting in Al, Si, and O. Zeolite’s consideration as a future material is due to many facile synthesis methods to obtain different structures with variations in pore size, surface area, pore volume and physical properties. These methods are developed using the control of relevant synthesis parameters that influences structure formation, such as crystallization temperature, time of aging and/or crystallization, stoichiometric relationships between components of synthesis gel, pH of the medium, and in some cases the type of structure-directing agent. Each method will lead to geometric changes in the framework formation, making possible the formation of typical chemical bonds that are the fingerprint of any zeolitic structure (O-Si-O and Al-O-Si), forming typical acid sites that give specificity in zeolite and allows it to act as a nanoreactor. The specificity is a characteristic that in some cases depends on selectivity, a fundamental property derived of the porosity, mostly in processes that occur inside the zeolite. In processes outside the structure, the surface area is the main factor influencing this property. Moreover, there are many natural sources with adequate chemical composition to be used as precursors. Some of these sources are waste, minimizing the deposition of potential hazardous materials that can be recalcitrant pollutants depending on the environment. Besides its uses as a catalyst, zeolite serves as a support for many bioprocesses; therefore, this review aims to explain relevant aspects in chemical nature, physical properties, main methods of synthesis, main precursors used for synthesis, and relevant applications of zeolites in chemical catalysis and biological processes.

show abstract

Tuning Gas Adsorption Selectivity and Diffusion Rates in Zeolites with Phosphonic Acid Monolayers

Cited by 3 publications

References 38 publications

Controlling Heterogeneous Catalysis with Organic Monolayers on Metal Oxides

Controlling Heterogeneous Catalysis with Organic Monolayers on Metal Oxides

Mechanism of selectivity control for zeolites modified with organic monolayers

Zeolites: A Theoretical and Practical Approach with Uses in (Bio)Chemical Processes

Contact Info

Product

Resources

About