Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Synthesis of hierarchical MCM-22 zeolite via a swelling and pillaring approach
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Show others and affiliations
(English)Manuscript (preprint) (Other academic)
Abstract [en]

Zeolites are type of microporous crystalline material which have been widely used in various aspects of industry, such as separation, adsorption, and catalysis. However, great diffusion limitation can be provoked due to small pore size of mircoporus framework in catalytic reactions. Hierarchical zeolites have been proved to be a successful alternative to solve the diffusion problem. Particularly, the synthesis of hierarchical porous zeolite by swelling and pillaring lamellar MWW zeolitic precursor has been proved as an efficient approach to solve the diffusion limitations in the catalytic reactions. In this work, hierarchical MWW zeolite has been synthesized by swelling and pillaring of lamellar MWW zeolitic precursor (MCM-22) using D4R building units. The synthesis procedure has been carefully studied by various characterization methods, such as PXRD, TEM, N2 adsorption-desorption and etc.

Keywords [en]
porous materials
National Category
Chemical Sciences
Research subject
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:su:diva-159911OAI: oai:DiVA.org:su-159911DiVA, id: diva2:1246859
Funder
Swedish Research CouncilAvailable from: 2018-09-10 Created: 2018-09-10 Last updated: 2018-09-24Bibliographically approved
In thesis
1. Synthesis, characterization and applications of hierarchical porous inorganic materials: a multi-dimensional approach
Open this publication in new window or tab >>Synthesis, characterization and applications of hierarchical porous inorganic materials: a multi-dimensional approach
2018 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Zeolites are a type of microporous crystalline materials that have been widely used in industrial applications including separation, adsorption, and catalysis. However, great limitations on diffusion through these materials can arise due to the small pores present in mircoporous frameworks, and this can impact catalytic reactions in particular. The synthesis of hierarchical zeolites has solved the diffusion problem. In this thesis, various hierarchically porous materials have been synthesized and tested as catalysts.

In the first part of this thesis, a titanium-containing hierarchically porous silicate material has been constructed from double-four-ring (D4R) units as building blocks.

In the second part of this thesis, hierarchical MWW zeolites were synthesized by swelling and pillaring of a lamellar MWW zeolitic precursor (MCM-22) using D4R building units. The synthesis procedure has been carefully studied by various characterization methods, such as PXRD, TEM, N2 adsorption–desorption etc.

In the last part of this thesis, MFI zeolites with controllable hierarchical pore systems have been prepared. Firstly, hierarchical ZSM-5 and TS-1 with open pores were generated using a temperature programmed dissolution–recrystallization post-synthesis treatment and tested as catalysts for benzyl alcohol self-etherification and cyclohexanone ammoximation. Secondly, single-crystalline hierarchical shell-like ZSM-5 has been synthesized via a dissolution–recrystallization post-treatment of mesoporous ZSM-5. The post-treatment increased the catalytic activity of the ZSM-5 zeolite for the aldol condensation of bulky substrates.

Place, publisher, year, edition, pages
Stockholm: Department of Materials and Environmental Chemistry, Stockholm University, 2018. p. 96
Keywords
Zeolites, Porous material, Hierarchical, Synthesis, Catalysis, MFI zeolite, MWW zeolite, ZSM-5, TS-1
National Category
Chemical Sciences
Research subject
Inorganic Chemistry
Identifiers
urn:nbn:se:su:diva-159912 (URN)978-91-7797-444-4 (ISBN)978-91-7797-445-1 (ISBN)
Public defence
2018-10-24, Magnélisalen, Kemiska övningslaboratoriet Svante Arrhenius väg 16 B, Stockholm, 10:00 (English)
Opponent
Supervisors
Funder
Swedish Research Council
Note

At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 1: Manuscript. Paper 2: Manuscript. Paper 4. Accepted.

Available from: 2018-10-01 Created: 2018-09-10 Last updated: 2018-09-25Bibliographically approved

Open Access in DiVA

No full text in DiVA

Search in DiVA

By author/editor
Lin, JunzhongYuan, NingZheng, HaoquanSun, Junliang
By organisation
Department of Materials and Environmental Chemistry (MMK)
Chemical Sciences

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 48 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf