Optimal aluminum-assisted mesoporosity development in MFI zeolites by desilication

Article Abstract:

The mechanism of intracrystalline mesopore formation by desilication in alkaline medium is controlled by tetrahedrally coordinated aluminum in MFI zeolite frameworks. A controlled mesoporosity development with preserved crystalline and acidic properties is enabled by the optimal molar Si/Al ratio in the range 25-50. This leads to more efficient zeolite utilization by improved diffusion characteristics.

Crystallization, Structure

---

Effect of the surface energy barrier on sorbate diffusion in AlPO(sub 4)-5

Article Abstract:

Two molecular modeling techniques were used for evaluating the importance of pore exit effects and the surface energy barrier on the sorbate diffusion in AlPO(sub -4)-5. Results indicate that the importance of the exit effects increases as the ratio of the size of the sorbate molecule to the pore size approaches unity.

---

Study of type-A zeolites. part2: effect of dehydration on the effective aperture dimension

Article Abstract:

A new insight into the role played by water molecules in the crystalline framework of type-A zeolites is provided. Water content is seen to be a valuable tool for studying the roles played by different mechanisms that determine the effective apertures dimension in A zeolites.

Similar abstracts:

• Abstracts: Structure and dynamics of a Bronsted acid site in a zeolite: ab initio study of hydrogen sodalite. On the role of Ti(IV) as a Lewis acid in the chemistry of titanium zeolites: Formation, structure, reactivity, and aging of Ti-peroxo oxidizing intermediates: A first principles study
• Abstracts: Theoretical investigation of the nature of aluminum-containing species present in alkaline solution. Atomistic modeling of gibbsite: cation incorporation
• Abstracts: Unravelling the disordered hydrogen bonding arrangement in solid triphenylmethanol. Dynamic properties of the tetrahydrofuran clathrate hydrate, investigated by solid state (super)2H NMR spectroscopy
• Abstracts: Surfactant-imposed interference in the optical characterization of GaP nanocrystals. Observation of a phase transformation of Ga2S3 in a quartz effusion cell above 1230 K by means of neutron scattering

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.