The significant effects of the alkali-metal cations on ZSM-5 zeolite synthesis: From mechanism to morphology

Liu, Chunyan; Gu, Wenjia; Kong, Dejia; Guo, Hongchen

doi:10.1016/j.micromeso.2013.08.037

Cited by 64 publications

(40 citation statements)

References 30 publications

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“…Effect of sodium. pH is buffered by NaOH additions in this study and by KOH additions in the one of Gin and Mestre (2001) and sodium seems to slightly favor resumption of alteration compared to potassium , Inagaki et al, 2002, Inagaki et al, 2006, possibly because of the important "structure-forming" function of Na + during zeolite precipitation (Liu et al, 2014). Effect of pH stability.…”

Section: Testmentioning

confidence: 63%

Resumption of Alteration at High Temperature and pH: Rates Measurements and Comparison with Initial Rates

Fournier

Frugier

Gin

2014

Procedia Materials Science

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Section: Testmentioning

confidence: 63%

Resumption of Alteration at High Temperature and pH: Rates Measurements and Comparison with Initial Rates

Fournier

Frugier

Gin

2014

Procedia Materials Science

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“…That is, the catalysts synthesized in the presence of TMAOH had broader XRD peaks which are oen seen with nanocrystalline materials. 16,29 The nature of these catalysts was further evident in their SEM images. Fig.…”

Section: Characterization Of Different Catalystsmentioning

confidence: 93%

Designing ferrierite-based catalysts with improved properties for skeletal isomerization of n-butene to isobutene

et al. 2017

RSC Adv.

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The crystal morphology and size of ferrierite catalysts were controlled by a suite of crystallization methods and structure-directing agents. In particular, nano-sized ferrierite could be obtained by using tetramethylammonium hydroxide and pyrrolidine as double structure-directing agents under dynamic crystallization. The catalysts were analysed by XRD, SEM, N 2 adsorption-desorption, NMR, XRF, NH 3 -TPD, Py-IR, and TGA, and the characteristics were correlated with their catalytic performance in the skeletal isomerization of n-butene. The results clearly indicated that all the catalysts have a similar crystallinity, Si/Al ratio, and total number of acid sites, while a decrease in their crystal size leads to more pore mouth acid sites. The nano-sized ferrierite showed better stability and higher activity, which were related to their crystal morphology, size, and pore mouth acid. In addition, we further confirmed that high isobutene selectivity can be produced by monomolecular reaction.

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“…The appropriate concentration of NaOH can substantially create mesoporous and microporous [14] . Combined with the ICP-OES result, the alkalis modification would dissolve impurity K in the channel and Si, Al in the framework.…”

Section: Methodsmentioning

confidence: 99%

Physicochemical properties and mechanism study of clinoptilolite modified by NaOH

Lin

Liu

Dong

et al. 2015

Microporous and Mesoporous Materials

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The significant effects of the alkali-metal cations on ZSM-5 zeolite synthesis: From mechanism to morphology

Cited by 64 publications

References 30 publications

Resumption of Alteration at High Temperature and pH: Rates Measurements and Comparison with Initial Rates

Resumption of Alteration at High Temperature and pH: Rates Measurements and Comparison with Initial Rates

Designing ferrierite-based catalysts with improved properties for skeletal isomerization of n-butene to isobutene

Physicochemical properties and mechanism study of clinoptilolite modified by NaOH

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