Sökning: onr:"swepub:oai:DiVA.org:su-159912" >
Synthesis, characte...
Synthesis, characterization and applications of hierarchical porous inorganic materials: a multi-dimensional approach
-
- Lin, Junzhong, 1987- (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
-
- Sun, Junliang, docent (preses)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
-
- Guo, Xinwen, Professor (opponent)
- Dalian University of Technology, China
-
(creator_code:org_t)
- ISBN 9789177974444
- Stockholm : Department of Materials and Environmental Chemistry, Stockholm University, 2018
- Engelska 96 s.
- Relaterad länk:
-
https://su.diva-port... (Preview)
-
visa fler...
-
https://su.diva-port... (primary) (Raw object)
-
https://urn.kb.se/re...
-
visa färre...
Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- Zeolites
- Porous material
- Hierarchical
- Synthesis
- Catalysis
- MFI zeolite
- MWW zeolite
- ZSM-5
- TS-1
- Inorganic Chemistry
- oorganisk kemi
Publikations- och innehållstyp
- vet (ämneskategori)
- dok (ämneskategori)
Hitta via bibliotek
Till lärosätets databas