Skip to Main content Skip to Navigation
Journal articles

A sponge-like small pore zeolite with great accessibility to its micropores

Abstract : Small pore zeolites, due to pore size constraint, have limited applications. Post-modification on the materials is therefore important to widen their use. A CHA-type zeolite (SSZ-13) with unique sponge-like structure is obtained by fluoride leaching. The development of macroporosity started from the crystal surfaces and continued progressively into the crystal by prolonging treatment. Nitrogen physisorption measurements showed an increase in micropore volume and specific surface area as a consequence of the dissolution of low crystalline part of the zeolite. The impact of etching on the accessiblity through the pore network, evaluated by means of breakthrough experiments of CO2/N2 and CO2/CH4 binary mixtures, showed an improved accessibility thanks to the interconnected macropores which shortens the diffusion pathlength. The set of experimental data shows the sponge-like SSZ-13 crystals retaining the intrinsic zeolitic properties but having an improve accessibility and crystallinity.
Document type :
Journal articles
Complete list of metadatas

https://hal-normandie-univ.archives-ouvertes.fr/hal-03034214
Contributor : Valentin Valtchev <>
Submitted on : Wednesday, December 9, 2020 - 1:55:56 PM
Last modification on : Wednesday, December 16, 2020 - 3:36:02 AM

File

221_Haw_2020_Inorg Chem Front ...
Files produced by the author(s)

Identifiers

Citation

Kok-Giap Haw, Simona Moldovan, Lingxue Tang, Zhengxing Qin, Qianrong Fang, et al.. A sponge-like small pore zeolite with great accessibility to its micropores. Inorganic Chemistry Frontiers, Royal Society of Chemistry, 2020, 7 (11), pp.2154-2159. ⟨10.1039/D0QI00261E⟩. ⟨hal-03034214⟩

Share

Metrics

Record views

18

Files downloads

7