期刊
CATALYSTS
卷 9, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/catal9020174
关键词
dehydrogenation; propane; propylene; hierarchical zeolite nanosheets; silicalite-1
资金
- Vidyasirimedhi Institute of Science and Technology (VISTEC)
- Thailand Research Fund (TRF) [MRG6180099]
- Office of Higher Education Commission (OHEC)
- TTSF by Thailand Toray Science Foundation
- National Nanotechnology Center (NANOTEC)
- NSTDA
- Ministry of Science and Technology, Thailand, through its program of Research Network NANOTEC (RNN)
Propane dehydrogenation (PDH) is the extensive pathway to produce propylene, which is as a very important chemical building block for the chemical industry. Various catalysts have been developed to increase the propylene yield over recent decades; however, an active site of monometallic Pt nanoparticles prevents them from achieving this, due to the interferences of side-reactions. In this context, we describe the use of promoter-free hierarchical Pt/silicalite-1 nanosheets in the PDH application. The Pt dispersion on weakly acidic supports can be improved due to an increase in the metal-support interaction of ultra-small metal nanoparticles and silanol defect sites of hierarchical structures. This behavior leads to highly selective propylene production, with more than 95% of propylene selectivity, due to the complete suppression of the side catalytic cracking. Moreover, the oligomerization as a side reaction is prevented in the presence of hierarchical structures due to the shortening of the diffusion path length.
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