Increasing resolution of selectivity in alkene hydrogenation via diffusion length in core-shell MFI zeolite

Xicheng Jia, Yanghwan Jeong, Hionsuck Baik, Jungkyu Choi, Alex C.K. Yip

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


We designed a core-shell zeolite structure comprises of palladium-deposited ZSM-5 core and silicalite-1 (S-1) shell which favors selectivity towards light olefin in hydrogenation via increased diffusion length. A well designed S-1/Pd/ZSM-5 core-shell structure was prepared via secondary crystallization of S-1 layer on the Pd/ZSM-5 core. The catalytic and selectivity performance of the S-1/Pd/ZSM-5 composite was evaluated in catalytic hydrogenation of alkenes in liquid phase. The synthesized S-1/Pd/ZSM-5 gives a much higher selectivity towards 1-hexene (87%) over cyclohexene (13%) even though both reactants are able to enter the 10-membered ring channels of the core-shell structure. The zeolitic core-shell composite also showed an increasing selectivity towards 1-hexene over 1-heptene as the S-1 layers built up, even though both are linear alkenes with similar kinetic diameter that are accessible to the MFI framework. In this work, we demonstrate a strong correlation between the thickness of the S-1 shell layer and the selectivity towards light olefins due to faster mass transfer rate. The design of the core-shell MFI structure is a new example of how selectivity in a zeolite-catalyzed reaction can be changed and enhanced without relying on typical molecular size exclusion process.

Original languageEnglish
Pages (from-to)94-100
Number of pages7
JournalCatalysis Today
Publication statusPublished - 2018 Sept 15

Bibliographical note

Funding Information:
The authors would like to thank the Royal Society of New Zealand for supporting this project partially under the Catalyst: Seeding General grant ( 16-UOC-002-CSG ). This research was also supported by the Super Ultra Low Energy and Emission Vehicle Engineering Research Center (SULEEV ERC) ( 2016R1A5A1009592 ) through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT . TEM characterization was conducted at the Seoul Center in the Korea Basic Science Institute (KBSI)

Publisher Copyright:
© 2018 Elsevier B.V.


  • Alkene hydrogenation
  • Core-shell structure
  • Diffusion length
  • MFI zeolite
  • Zeolite selectivity

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry


Dive into the research topics of 'Increasing resolution of selectivity in alkene hydrogenation via diffusion length in core-shell MFI zeolite'. Together they form a unique fingerprint.

Cite this